location details disclosure 2009 daf act rti · 2019-08-11 · rti act 2009 . biosecurity...

Biosecurity Queensland

National Red Imported Fire Ant Eradication Program Date prepared: 3/08/2018 of 7

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Fire Ant Significant Detection Report

Significant detection report (SDR) Blenheim

Pest Red Imported Fire Ant (Solenopsis invicta Buren)

Initial notification to the Steering Committee 18 May 2018

Notification to the National Biosecurity Management Consultative Committee (NBMCC)

18 May 2018

SDR finalised 27 July 2018

Definition of a Significant Detection Significant detections are defined as new infestation discovered beyond the operational boundary. The Operational boundary is the boundary surrounding 5 km buffer around known infestation detected within a set timeframe1. This boundary is reviewed and adapted on an annual basis.

LOCATION DETAILS Location Jims Road, Blenheim

Local Government Area Lockyer Valley Regional Council

Distance from closest known infestation

This Blenheim detection is located approximately 1.7 km to the west (2018) and 5.2 km to the south (2017) of infestations also in the suburb of Blenheim (Map 1).

Distance from operational boundary (2017–18)

370 m (Map 1)

Outside the fire ant biosecurity zones

No (Map 1)

DETECTION DETAILS Detection date(s) 5 April 2018

Source(s) The colony was reported by the property owners to one of the Program teams working in the area following a letterbox campaign. This campaign followed an earlier detection also in the suburb of Blenheim but within the operational boundary.

Description (including land use) One colony was detected in a rural area, within a house yard. More specifically, the colony was located at the edge of the house yard, between a vegetable garden and the neighbouring paddock, which is regularly cultivated.

INFESTATION DETAILS Incidence One colony comprised of one mound. The mound was small at 40 cm

in length, 30 cm in width, and 15 cm in height.

Severity (low, medium, high) Low – The mound is small and relatively isolated. Delineation surveillance conducted within 500 m of the colony has found no additional infestation.

Colony assessment The colony included worker ants, reproductive pupae, and female

1 Five years – 2012 to 30 June 2017

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alates.

Reproductive area of infestation2 Yes.

INITIAL RESPONSE DETAILS Delineation surveillance out to a minimum of 500 m

Delineation surveillance was completed on 1 May 2018 over the immediate property and adjoining properties with suitable habitat. The distance surveyed from the colony varied from 240m at its closest out to 800m. The average radius was approximately 400 m. (Map 2) No additional infestation was found as a result of this delineation surveillance.

Insect Growth Regulator (IGR) bait treatment out to 500 m

IGR bait treatment was conducted at the time of delineation surveillance over the 69 hectares. (Map 2).

Destruction of the colony by direct nest injection (DNI) using the contact insecticide fipronil

DNI was conducted on 24 April 2018.

FURTHER RESPONSE DETAILS Surveillance of targeted high risk sites between 500 m – 2 km of the detection(s)

Other targeted surveillance within the area between 500m and 2km of the detection is currently being completed.

Surveillance of targeted high risk sites beyond 2 km from the detection(s)

See ‘Further recommendations/actions’ below.

COMPLIANCE ACTIONS Fire ant carriers brought on site from within the fire ant biosecurity zones?

No.

Will fire ant carriers be leaving the infested site(s)?

No.

Movement controls implemented No movement controls are necessary, as the landowners do not plan to move fire ant carriers offsite. Landowners have been made aware of their general biosecurity obligation.

TRACING INVESTIGATIONS

INBOUND CARRIERS (in the past 12 months) Carrier Date brought on Source location

Soil Nil

Turf Nil

Mulch Nil

Sands Nil

Gravels Nil

Potted plants Nil

2 A reproductive area of infestation is defined as multiple colonies containing alates of alternate sexes within a 2 km buffer.

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INBOUND CARRIERS (in the past 12 months) Other – specify and list

Nil

OUTBOUND CARRIERS (in the past 12 months) None removed from site.

Tracing investigations summary

Tracing enquiries confirmed that fire ant carriers have not been brought onto the residential property in the past 12 months.

GENETICS As per standard procedure, genetic analysis has been conducted on the bulk samples extracted from the colony during DNI treatment. Testing has revealed:

New incursion No

Social form Monogyne

Relationship testing (matrilineal relationships)

Genetic testing occurred between the most recent detections in Blenheim in April 2018 and previous detections in that area.

Results summary of relationship testing (if known)

Genetic testing has determined that this detection is the daughter of a previous detection found in July 2017, approximately 5.2 km to the north. In addition, the colony of this detection provided the queen and males that resulted in the nearby nest, also located in Blenheim and detected in April 2018. Due to the inbreeding occurring between these nests, testing of additional nests in the area has presented difficulties in clarifying the relationships between these and older detections.

COMMUNICATION AND STAKEHOLDER ENGAGEMENT ACTIVITIES Notification to government representatives

Lockyer Regional Council notified of detection in monthly detection report issued on 3 May 2018.

Notification to residents within 2 / 5 km of the detection

23 April 2018, 1,438 ‘Fire ants found in your area’ alert flyers sent to residents and businesses within Blenhiem, Mount Berryman, Mulgowie, Thornton, Lower Tenthill, Rockside, Ropeley and Woodlands

Summary of additional engagement activities

19 April, display held with the mobile office unit at Gatton Square Shopping Centre engaging directly with 140 local residents.

23 April, Aka the fire ant tracker presentation delivered to 50 students at Thornton State School

26 April, corflute road signage placed in Blenheim, Gatton, Thornton and Ropeley

27 April, display held at Laidley Friday Market directly engaging with 120 people

2 May, fire ant awareness training session delivered to 28 participants from the Marburg, Grandchester and Lower Mt Walker rural fire brigades

23 May, Aka school presentation delivered to 65 students at Grandchester State School.

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BUDGET IMPLICATIONS – COST OF THE BLENHEIM DETECTION

Cost of operational activities completed

$21 707

Cost of operational activities planned Cost of compliance activities completed

$1 233

Cost of communication activities completed

$1 879

Cost of genetic activities completed

$2 177

Total cost $26 996

FURTHER RECOMMENDATIONS / ACTIONS Surveillance activities With this detection and a number of others in the Thornton valley the

targeted and sentinel surveillance program for the winter of 2018 has been bolstered to provide additional intensity of surveillance in this area.

Movement controls No movement controls are necessary.

Tracing investigations No further tracing investigation is required given that the property is a residential block and no carriers have been received.

Genetics No further genetic tests are necessary.

Communications No further plans at this stage, however consideration will be given to further target communication and engagement activities if the need arises.

Can this be implemented within the existing budget?

Yes.

CONCLUSIONS Significance of detection The significance of this Blenheim detection is high due to the risk of

spread, as evidenced by the presence of alates and its location beyond the western limits of the operational boundary.

Possibility of human assisted spread in relation to this significant detection

The likelihood that the infestation is a direct result of human assisted movement is very low given no fire ant carriers are reported by the landholder as having been brought on site from within the fire ant biosecurity zones. No evidence has been found to challenge this conclusion.

Possibility of nuptial flight spread in relation to this significant detection

Given proven genetic relationships between this detection and other known colonies in the area, it is highly likely Blenheim is a result of nuptial flight. The presence of female alates creates a high risk of further spread by nuptial flight, given the other next closest detection was found to comprise male alates.

Future eradication planning The Program is currently considering whether this detection and those to the south in the Thornton valley can be baited aerially during the 2018-19 treatment season. These infestations have received limited amount of IGR broadcast bait treatment to date. The lack of any strong relationship between this detection and the Thornton detections further to the south would also suggest that more infestation may exist in the area. An out-of-session paper on this issue will be submitted to the Steering Committee.

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MAPS Map 1: Location of the Blenheim detection in proximity to nearby known infestation and the 2017–18 Operational Boundary.

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Map 2: Surveillance and treatment completed and planned in response to the Blenheim detection.

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Map 3: Close-up view of land use out to 5 km from the Blenheim detection.

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Biosecurity Queensland Control Centre Date prepared: 28/03/2018 Page 1 of 9

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RIFA Significant Detection Report

Significant detection report (SDR) Bridgeman Downs


Initial notification to the Steering Committee 9 January 2018


9 January 2018

SDR finalised 28 March 2018

Definition of a Significant Detection Significant detections are defined as new infestation discovered beyond the operational boundary. The Operational boundary is defined as a 5 km buffer around known infestation (active and inactive) detected within a set timeframe1. This boundary is reviewed and adapted on an annual basis.

LOCATION DETAILS Location Darien Street Park, Bridgeman Downs

Local Government Area Brisbane City Council

Distance from closest known infestation (inactive and active)

The Bridgeman Downs detection is located approximately 4 km to the west of infestation in the suburb of Fitzgibbon (2017) and approximately 6 km from infestation in Bracken Ridge (2016) (Map 1).


1.4 km (Map 1)


Yes (Map 1)

DETECTION DETAILS Detection date(s) 5 January 2018

Source(s) Public – the suspect nest was reported to the National Program by a Brisbane City Council employee, highlighting the importance of community surveillance and the fire ant general awareness training that is provided to the public and industry by the National Program.

Description (including land use) One small nest has been detected on the edge of a sports field where some minor construction works (shaded seating area and access ramp construction) have recently been carried out. The sports field is currently not in use while facility upgrade works are in progress.

INFESTATION DETAILS Incidence One colony comprised of small one mound. The nest was small at

30 cm in length, 30 cm in width, and 5 cm in height. Images 1 and 2 show the size and visibility of the mound.

Severity (low, medium, high) Low – Delineation surveillance conducted with 500 m of the colony has found no additional infestation.

Colony assessment Only worker ants and worker pupae were found within the colony.


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There may be an absence of alates and the full range of castes within the colony for the following reasons:

The full caste of brood and alates may have been present however were not found.

The queen may have already perished.

Less likely reasons are:

The nest may be too young to produce alates. The nest may have established at another location and

subsequently transported to this location without a queen. The alates may have already flown. Over the past 4–5 months

there have a number of occasions when weather conditions were suitable for nuptial flight, however surveillance out to 500 m from this colony did not detect any other colonies as would be expected if a nuptial flight had occurred.

Reproductive area of infestation2 No


Delineation surveillance commenced on 9 January 2018 and was completed on 11 January 2018. The surveillance was undertaken by field staff with 86 hectares surveyed (Map 2). No further fire ants were detected.


IGR bait treatment was conducted at the time of direct nest injection out to 10 m surrounding the nests. Further IGR baiting out to 500 metres was completed on 11 January 2018 (Map 3).


DNI was conducted on 5 January 2018.


Targeted high-risk sites for surveillance have been identified through consultation with the Science and Compliance teams, and include development sites, sports fields and disturbed land (Map 2). A total of 236 ha of targeted surveillance has been completed. All targeted sites within the 2 km buffer zone have either been completed or are partially completed (Map 2).


See ‘Further recommendations/actions’ below.


No.


There are no planned movements of fire ant carriers off-site.

Movement controls implemented No movement controls are necessary, as the landowners do not plan to move fire ant carriers offsite. Landowners have been made aware of their general biosecurity obligation.


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Soil - -

Turf June 16 to Dec 17

Gleneagle (outside zones).

Mulch - -

Sands June 16 to Dec 17

Sand underlay sourced from Ningi (outside zones).

Gravels - -

Potted plants - -

Other – specify and list

- -

OUTBOUND CARRIERS (in the past 12 months) None removed from site.


Investigations revealed that no carriers from inside the fire ant biosecurity zones were received at the site within the past 12 months, and there are currently no planned movement of fire ant carriers from the site.

At the time of the detection, some small soil stockpiles were present at the crematorium adjacent to the infested sports field but were determined to have originated from the crematorium site, and would remain on site.

A number of sites in the area surrounding this infestation known to have received turf from a high-risk business in Stockleigh were visited. However no further infestation was apparent on these sites.

A number of checks at new residential developments and soil disposal sites in the area surrounding the detection all of which appear to be compliant.


New incursion No



Genetic testing occurred between:

Bridgeman Downs and the 2017 Fitzgibbon detections (nearest known infestation)

Bridgeman Downs and the 2016 Bracken Ridge detection (next closest known infestation)

The 2017 Fitzgibbon detection and the 2016 Bracken Ridge detection.


Analysis has shown the Bridgeman Downs colony was a result of mating between a Bracken Ridge queen and a Fitzgibbon male. As Bridgeman Downs is in close proximity to both Bracken Ridge and Ftizgibbon it can be concluded the infestation at Bridgeman Downs was founded through nuptial flight.

Samples from both the Fitzgibbon and the Bracken Ridge infestations were previously tested for links to the Brisbane Airport infestation, and none were found.

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Holding statement and speaking points provided to the Minister’s Office on 05/01/2018 and updated points provided on 25/01/2018.

Brisbane City Council notified on 10/01/2018. Significant stakeholders notified on 10/01/2018. Local, state and federal representatives notified on 10/01/2018.


On 29/01/2018 alert flyers were mailed out to 2795 properties in Bridgeman Downs, and 18,020 properties in the nearby suburbs of Aspley, Carseldine, Albany Creek and McDowall.

Facebook advertising was conducted from 15–29/01/2018 for two weeks, targeting residents in Bridgeman Downs and 16 surrounding suburbs. The advertisements reached 111,760 people with extremely successful engagement figures of 750 reactions, 489 comments, and 934 shares.

254 new Biosecurity Queensland Facebook likes can be attributed to the success of this advertising.


Signage placement in local open spaces and high vehicular and pedestrian traffic areas.

Local community, environmental and sporting groups identified and requested to distribute information through their communication channels.

Primary and secondary schools in Bridgeman Downs and surrounding suburbs were contacted and provided with content for their newsletters.

Community Facebook groups in the area were identified and requested they post information about the detection on their pages.

Four interactive displays were held at local retail hubs in the surrounding area, with officers directly engaging with over 500 residents.

BUDGET IMPLICATIONS – COST OF THE BRIDGEMAN DOWNS DETECTION Cost of operational activities completed

$58,677

Cost of operational activities planned

$63,401

Cost of compliance activities completed

$1,023


$10,096


$2,121

Total cost $135,318

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FURTHER RECOMMENDATIONS / ACTIONS Surveillance activities A total of 255 ha is identified for future targeted surveillance, at both

partially completed sites within the 2 km buffer zone and beyond, in areas surrounding Bridgeman Downs and on suitable habitat between Bridgeman Downs, and Bracken Ridge and Fitzgibbon (Map 2).

It is anticipated targeted surveillance not yet completed will be undertaken in the two weeks following the submission of this report, likely to be done when field staff are unable to treat due to wet weather.

Movement controls Nil. No movement controls are necessary.

Tracing investigations Nil. No further tracing investigation is required given that genetic analysis has already determined the founding of this colony is a result of nuptial flight.

Genetics Nil. No further genetic tests are necessary.

Communications No further plans at this stage, however consideration will be given to further target communication and engagement activities if the need arises.


Yes

CONCLUSIONS Significance of detection The significance of this detection is high due to the location and

because it has been proven to be the result of a nuptial flight. Surveillance in the surrounding areas to date, however, has not found any additional infestation.


Nil


Genetic testing has proven a queen from Bracken Ridge mated with a Fitzgibbon male, and founded this colony at Bridgeman Downs.

Future eradication planning This detection will be considered during the annual assessment of the operational boundary, and for remote sensing activities in future years.

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IMAGES: BRIDGEMAN DOWNS

Image 1: image of the nest with shaded seating areas in the background

Image 2: image of the nest facing east

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MAPS Significant Detection Maps

Map 1: Location of the Bridgeman Downs detection in proximity nearby known infestation and the 2017–18 Operational Boundary.

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Map 2: Surveillance and treatment conducted in response to the Bridgeman Downs, Bracken Ridge and Fitzgibbon detections, and planned targeted surveillance surrounding the Bridgeman Downs detection.

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Map 3: Close-up view of landuse out to 2 km from the Bracken Ridge detection.

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Significant detection report (SDR) Thornton No.1


Initial notification to the Steering Committee 6 April 2018


6 April 2018

SDR finalised 8 June 2018

Definition of a Significant Detection Significant detections are defined as new infestation discovered beyond the operational boundary. The Operational boundary is defined as a 5 km buffer around known infestation (active and inactive) detected within a set timeframe1. This boundary is reviewed and adapted on an annual basis.

LOCATION DETAILS Location Main Camp Creek Road, Thornton

Local Government Area Lockyer Valley Regional Council


The Thornton No.1 detection is located approximately 1.45 km to the north east of infestation also recently detected in the suburb of Thornton (2018). It is approximately 6 km to the west of infestation in the suburb of Mount Mort (2014) and approximately 11 km to the west of the next closest active infestation at Rosevale (2017) (Map 1).


1.1 km (Map 1)


Yes (Map 1)

DETECTION DETAILS Detection date(s) 4 April and 29 April 2018

Source(s) National Red Imported Fire Ant Eradication Program – the infestation was detected by Program staff during planned targeted surveillance. Further infestation was found as a result of response activities concerning the initial detection.

Description (including land use) Seven medium sized nests were detected on a farm in a fallow field, previously cultivated for the production of lucerne hay.

INFESTATION DETAILS Incidence Two colonies comprised of seven mounds.

Severity (low, medium, high) Medium due to the presence of both male and female alates.

Colony assessment One colony contained both male and female alates and larvae. Both colonies contained worker and reproductive pupae. One comprised of two medium sized nests, the largest measuring 90 cm in length, 70 cm in width, and 10 cm in height. Images 1 and 2 show the size and


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visibility of the nests. The other colony comprised five smaller nests, the largest of which measured 25cm in length, 25cm in width, and 20 cm in height.

Reproductive area of infestation2 No.


This detection occurred during a planned targeted surveillance of 742 hectares. Delineation surveillance commenced on 4 April 2018 and was completed on 11 April 2018. The surveillance was completed on602 hectares of the target 742 hectares (Map 2). The remaining area was unable to be surveyed at the time due to mature crops. Follow up surveillance will occur once the crops have been harvested.


IGR bait treatment was conducted at the time of delineation. Further IGR baiting out to 500 metres was completed on 28 April 2018 (Map 2). A further five nests were detected during this latter treatment and the 500m radius for IGR baiting extended accordingly. 13 hectares was not able to be IGR baited due to the maturity of the crops. These areas will be revisited in coming weeks following harvest.


DNI was conducted on 6 April and 30 April 2018.


A total of 602 ha of targeted surveillance has been completed. All targeted sites within the 2 km buffer zone have either been completed or are to be completed when the sites are accessible.


Targeted high-risk sites for surveillance have been identified through consultation with the Science and Compliance teams (Map 2). These areas will form part of the targeted surveillance and sentinel surveillance for the winter months.


No.


There are no planned movements of fire ant carriers off-site. Hay has been produced and sold from this site within the last 12 months. The landholder has stated that the remaining hay will be kept onsite to feed cattle.

Movement controls implemented No biosecurity order has been issued as the landowner does not plan to move fire ant carrier’s offsite. The landholder is aware of his general biosecurity obligation.



Soil Nil. Nil.


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INBOUND CARRIERS (in the past 12 months) Turf Nil. Nil.

Mulch Nil. Nil.

Sands Nil. Nil.

Gravels Nil. Nil.

Potted plants Nil. Nil.

Other – specify and list

Nil. Nil.

OUTBOUND CARRIERS (in the past 12 months) Approximately 40 round hay bales produced on the site were sold to Gorwie Little Plains (west of Toowoomba) earlier in 2018. Multiple smaller hay consignments have been sold from a roadside stall. The landholder does not have records of the destination of hay sold from the roadside stall. Discussions with the landholder suggest the hay was produced and stored using techniques that reduce the risk of infestation by fire ants.


Compliance has contacted the purchaser of the 40 round hay balesHe has fed the hay to cattle at Little Gowrie Plain. has not observed any suspect fire ants at the site. has been provided with a fact sheet on identifying fire ants.

The Science Monitoring Team completed surveillance on this property on 17 May. No fire ants were detected.


New incursion No



Genetic testing occurred between:

Thornton and Lower Mount Walker

Thornton and Grandchester

Thornton and Laidley South


Testing indicates strong relationship between one of the colonies to a colony in Lower Mount Walker. Testing indicates no strong relationship between the two colonies detected separately but at this same site location.

COMMUNICATION AND STAKEHOLDER ENGAGEMENT ACTIVITIES Holding statement and speaking points

A holding statement was provided to the Media Manager to send up to Ministers office on 6 April. Speaking points were provided to Media Manager, Customer Service Centre DAF and Richlands and to Program Managers for distribution on 9 April.

Notification to government representatives and industry stakeholders

On 9 April notification was sent to representations at all three levels of government. On 10 April notification was provided to stakeholders including our council operational contacts in the Lockyer Valley and key industry stakeholders including Nursery and Garden Industry Qld,

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Telstra, Ag Force, Qld Farmers Federation, Growcom, Department of Transport and Main Roads, Qld Urban Utilities and Plant Biosecurity and Product Integrity.


23 April, 1,438 ‘Fire ants found in your area’ alert flyers sent to residents and businesses within Blenhiem, Mount Berryman, Mulgowie, Thornton, Lower Tenthill, Rockside, Ropeley and Woodlands


19 April, display held with the mobile office unit at Gatton Square Shopping Centre engaging directly with 140 local residents.

23 April, Aka the fire ant tracker presentation delivered to 50 students at Thornton State School

26 April, corflute road signage placed in Blenheim, Gatton, Thornton and Ropeley.

27 April, display held at Laidley Friday Market directly engaging with 120 people

2 May fire ant awareness training session delivered to 28 participants from the Marburg, Grandchester and Lower Mt Walker rural fire brigades.

BUDGET IMPLICATIONS – COST OF THE THORNTON DETECTION Cost of operational activities completed

$48,104.71

Cost of operational activities planned

$31,749.57

Cost of compliance activities completed

$3,742.73


$5,315.86


$5,709.22

Total cost $94,622.10

FURTHER RECOMMENDATIONS / ACTIONS Surveillance activities Nil.

Movement controls Nil.

Tracing investigations Further investigation of the movement of fire ant carriers to the area will be undertaken following the completion of delineation surveillance.

Genetics Further testing will be undertaken against samples of colonies from recent detections at Blenheim.

Communications Nil.


Yes.

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CONCLUSIONS Significance of detection The significance of this Thornton No.1 detection is high due to the risk

of spread, as evidenced by the presence of both male and female alates and its location beyond the western limits of the Operational Boundary.


The likelihood that the infestation is a direct result of human assisted movement is low given no fire ant carriers are reported by the landholder as having been brought on site from within the fire ant biosecurity zones. No evidence has been found to challenge this conclusion.


Based on the current information, the likelihood that the infestation is related to nuptial flight spread (more than one flight) is medium. A higher confidence in nuptial flight cannot be established as the strongest known genetic relationship is with a colony detected in excess of 10km away at Lower Mount Walker.

Future eradication planning The Program is currently considering whether this detection and the Thornton valley in which it is located can be baited aerially during the 2018-19 treatment season. These infestations have received limited amount of IGR broadcast bait treatment to date. It is possible that this infestation was not the result of a direct human–assisted movement. The lack of any strong relationship between the two colonies comprising this detection, and another colony more recently detected nearby, would also suggest that more infestation may exist in the area. An out-of-session paper on this issue will be submitted to the Steering Committee.

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IMAGES: THORNTON Image 1: image of the nest 1.

Image 2: image of the nest 2.

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Map 1: Location of the Thornton detection in proximity nearby known infestation and the 2017–18 Operational Boundary.

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Map 2: Surveillance and treatment conducted in response to the Thornton detection.

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Map 3: Close-up view of landuse out to 5 km from the Thornton detection.

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Significant detection report (SDR) Beaudesert


Initial notification to the Steering Committee 25 September 2017


25 September 2017

SDR finalised 15 December 2017

SDR submitted to the Steering Committee 20 December 2017

Definition of a Significant Detection Significant detections are defined as new infestation discovered beyond the operational boundary. The Operational boundary is defined as a 5km buffer around known infestation (active and inactive) detected within a set timeframe. This boundary is reviewed and adapted on an annual basis.

LOCATION DETAILS Location Oakland Way and Parker Court, Beaudesert

Local Government Area Scenic Rim Regional Council


The Beaudesert detection is located 11 km south from infestation in Woodhill (2016) and 12 km south from infestation in Allenview (2016).


Approximately 6 km


Yes

DETECTION DETAILS Detection date(s) 20 September 2017

Source(s) Operational – detected as part of Sentinel site surveillance activities.

Description (including land use) A total of two colonies have been detected on a housing development site. The first colony is located on the grounds of a newly built school / college that is currently under continuing development. The second colony has been detected on a vacant residential lot just over 150 metres away from the first colony and within the same housing development.

INFESTATION DETAILS Incidence Two colonies comprised of five mounds.

Severity Medium – the colonies contained alates of both sexes and a full range of castes so were reproductively viable. However only two colonies were detected. The two colonies were directly related – with the queens being sisters.

Colony assessment Both colonies contained a full range of castes including both female and male alates, reproductive and worker pupae and larvae. The largest of the mounds was approximately 100 cm in length, 40 cm wide and 5 cm high. The second largest mound was 60 cm in length,

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50 cm wide and 15 cm high.

Reproductive area of infestation1 Yes


Delineation surveillance commenced on 20 September 2017 and was completed on 5 October 2017. The surveillance was undertaken by field staff. Approximately 65 hectares was surveyed.


Only minimal IGR bait treatment was conducted at the time of detection (out to 10 m surrounding the nests).


DNI conducted on 21 September 2017

FURTHER RESPONSE DETAILS Surveillance of targeted high risk sites between 500m – 2km of the detection(s)

Surveillance commenced on 29 September 2017 and was completed on 1 November 2017. Approximately 150 hectares was surveyed with no further fire ants detected. The surveillance was undertaken by field staff.


Yes, six different fire ant carriers have been sourced from seven locations within the fire ant biosecurity zones (see investigations table).

These movements were either conducted in accordance with the Biosecurity Regulation 2016 (the Regulation) or under the measures outlined in a biosecurity instrument permit (BIP).

Of the six fire ant carriers / seven source locations, five of the businesses have had compliance checks undertaken in the past six months (June, July and August 2017). The two remaining businesses had compliance checks undertaken in August 2016 and December 2016 respectively.

Of the seven source locations, three are known to have previously been infested, Woongoolba, Alberton and Stockleigh.

It should be noted that there have been several companies/contractors operating on the estate since development works commenced in 2015. It has not been possible to contact all of the companies’ involved.


Further construction activities will commence at the college (location of colony 1) in April 2018; however, there appears to be a low likelihood that soil or other carriers will move from the site at this time.

INVESTIGATIONS INBOUND CARRIERS (in the past 12 months) Carrier Date brought on Source location

Road base Stage 1A in April–May 2016 and stage 1B in Sept–Oct 2016

Cedar Creek (fire ant biosecurity zone 2)


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Fill May–July 2016 Beaudesert (outside the fire ant biosecurity zone)

Topsoil April–May 2017 Gleneagle (outside the fire ant biosecurity zone)

Mulch April–May 2017 Gleneagle and Biggera Waters (outside the fire ant biosecurity zone)

Turf Various dates Stockleigh and Allenview (fire ant biosecurity zone 2) Gleneagle and Boyland (outside the fire ant biosecurity zone)

Turf under layer (sand)

Dec 2015 & Feb 2016

Mt Cotton (fire ant biosecurity zone 2)

Bio filter sands Dec 2016 Nimbi (outside the fire ant biosecurity zone)

Sands July 2017 Bromelton (outside the fire ant biosecurity zone)

Gravels July 2017 Beaudesert (outside the fire ant biosecurity zone)

Potted plants Dec 2016 Alberton (fire ant biosecurity zone 2) Deco Jan 2017 Darra (fire ant biosecurity zone 1) Soil blends April 2017 Woongoolba (fire ant biosecurity zone 2)

OUTBOUND CARRIERS (in the past 12 months) – none removed from the site.


Tracing investigations have revealed a number of fire ant carriers have been brought onto the site during various stages of development. Genetic analysis has revealed that the Beaudesert colonies are not related to infestation from these locations (pending results from Alberton and Darra).


New incursion No



Genetic testing may indicate relatedness to other SEQ infestation. The samples from the Beaudesert detection will be tested against the following infestations:

Allenview (all colony points); nearest known colonies to Beaudesert

Cedar Grove (all colony points); nearest known colonies Woodhill (all colony points); nearest known colonies Stockleigh (previously infested turf farm); source of turf from

within the fire ant biosecurity zone Alberton (previously infested nursery); source of potted plants

from within the fire ant biosecurity zone Mt Cotton (selected nearby colony points); source of turf

underlay from within the fire ant biosecurity zone Cedar Creek (selected nearby colony points); source of road

base from within the fire ant biosecurity zone Darra (selected nearby colony point); source of landscaping

materials from within the fire ant biosecurity zone. Woongoolba (previously infested); source of soil blends from

within the fire ant biosecurity zone. Results summary of relationship testing (if known)

The Beaudesert samples are not related to any of the nearest known colonies (Allenview, Cedar Grove or Woodhill). The colonies are related to a different sub-cluster (subpopulation) to these locations. However, further samples from Cedar Grove are still awaiting analysis.

The Beaudesert samples are not related to infestation at Stockleigh (turf) or Woongoolba (soil blends).

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There were also no links with infestation tested from the Cedar

Creek (road base) or Mt Cotton (turf underlay) areas.

Testing against colonies from the Darra and Alberton source locations is still pending.

Further testing has indicated a secondary link (e.g. cousin, aunt or niece) to a colony in Rochedale (the colony was detected and destroyed in 2015). More information may be gathered once the back log in genetic analysis is completed.


Scenic Rim Regional Council notified on 21 Sept 2017 Holding statement and speaking points provided to the

Ministers’ Office on 20 Sept 2017 Significant stakeholders notified 21 Sept 2017 Local, state and federal representatives notified on 21 Sept

2017 Media release on 22 Sept 2017


On the 9 October 2017 alert flyers were mailed out to nearly 3000 properties in Beaudesert and over 650 properties in the nearby suburb of Gleneagle.

Facebook advertising was conducted from 23 to 27 October, targeting Beaudesert residents and the surrounding suburbs. This advertisement reached2 over 10 000 people with nearly 80 000 Facebook impressions3, and nearly 870 link clicks4.


On 25 October 2017 1700 fire ant ID cards and 1200 alert flyers were distributed to local businesses and centres, such as Mitre Ten, Beaudesert Post Office and the Scenic Rim Regional Council Customer Service Centre. This also provided direct engagement opportunities with employees and the public at these locations.

On 1 November 2017 the department’s Mobile Office Unit (MOU) was deployed to Beaudesert, providing opportunities for direct engagement with the local community.

Direct engagement with relevant staff at local schools in the immediate area, and the Beaudesert racecourse and golf course.

Fire ant alert signage placed along entry of main roads in the Beaudesert area.

BUDGET IMPLICATIONS – COST OF THE BEAUDESERT DETECTION TO DATE Cost of operational activities to date

$44 500

Cost of compliance activities to date

$4 500

Cost of communication activities to date

$10 388

Cost of genetic activities to date $1 900

Total cost $61 288

2 Post reach is the number of people who have seen your post. Your post counts as reaching someone when it's shown in News Feed. Reach can be broken down into people who saw your posts with or without advertising (paid or organic posts). Figures are for the first 365 days after a post was created and include people viewing your post on desktop and mobile. 3 Impressions are the number of times a post from your page is displayed, whether the post is clicked or not. People may see multiple impressions of the same post. For example, someone might see a page update in their news feed once, and then a second time if a friend shares it. 4 The number of clicks on ad links to selected destinations or experiences on or off Facebook-owned properties.

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FURTHER RECOMMENDATIONS / ACTIONS Operational activities IGR bait treatment is required out to 500m - the remainder of this

treatment will be scheduled to be completed in January 2018. Further targeted surveillance to confirm if there is infestation beyond 2 km from the Beaudesert infestation will be scheduled to be conducted during 2018. There will be ongoing monitoring through Sentinel site surveillance.

Movement controls Compliance officers will continue to monitor the development site and encourage mutual co–operation with risk mitigation measures (where applicable) and ensure businesses are aware of their general biosecurity obligation (GBO) under the Biosecurity Act 2014 (the Act).

Tracing investigations None applicable

Genetics Further routine testing will occur, (for example microsatellite testing of Rochedale colonies as part of the main log of samples) but no samples from Rochedale will be expedited for testing at present. Further analysis of samples relating to fire ant carriers will occur to rule out any links (Alberton and Darra).

Communications None applicable


Yes

CONCLUSIONS Significance of detection The significance of the Beaudesert is major due to the fact

reproductively viable colonies were detected. However, only two colonies were detected, with no further fire ants detected during surveillance indicating the infestation may not have spread further.


The likelihood that infestation has arrived in Beaudesert due human assisted spread is high due to the combination of three key factors:

1. The distance of the infestation from known colonies is well beyond the average nuptial flight distance (unassisted by wind).

2. The fact genetic analysis revealed that the Beaudesert colonies were not related to the nearest known colonies, nor related to the same sub–population as these colonies. If infestation was through nuptial spread it would be expected that the Beaudesert colonies would be related to the same sub–population as the nearest known colonies.

3. The genetic relationship (secondary) to a colony in Rochedale, which is nearly 50 km to the north of Beaudesert.

Furthermore, the site is a residential development, where movements of fire ant carriers and machinery from infested areas has occurred.

However, presently there is no direct evidence, tracing or genetic analysis, that links this to a particular movement that has been identified through investigations. This is in fact extremely difficult to determine unless real time movements are directly linked with genetics (e.g. foraging ants moved on wooden pallets to Upper Kedron).


The likelihood that infestation has arrived in Beaudesert as a result of nuptial flight spread is low due to the factors that are mentioned above.

Future eradication planning It is likely that this detection will be considered for remote sensing activities in future years.

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IMAGES: BEAUDESERT

Above: panoramic view of the Oakland Estate

Above: image of first colony – located on school site

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Above: path leading to first colony

Above: location of second colony

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Above: image of the second colony

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Map 1: A map displaying the Beaudesert detections in proximity nearby known infestation and the Operational Boundary 2017–18.

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Map 2: A map displaying the Beaudesert detections in relation to each other.

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Map 3: A map displaying the surveillance that has been conducted in relation to the Beaudesert detections.

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RIFA Significant Detection Report Significant detection report (SDR)

Lowood


Initial notification to the Steering Committee

4 August 2017

SDR finalised 31 October 2017

SDR submitted to the Steering Committee

6 November 2017

Definition of a Significant Detection

Significant detections are defined as new infestation discovered beyond the operational boundary. The Operational boundary is defined as a 5km buffer around known infestation (active and inactive) detected within a set timeframe. This boundary is reviewed and adapted on an annual basis.

LOCATION DETAILS Location Mallard Street and Corella Streets, Lowood

Local Government Area Somerset Regional Council

Distance from closest known infestation

Approximately 10 km east from Kensington Grove (2017) and 10 km north from Marburg (2017)


Approximately 5 km


Yes

DETECTION DETAILS Detection date(s) 3, 5 and 8 August 2017

Source(s) Operational – detected as part of Sentinel site surveillance activities and further delineation surveillance.

Description (including land use) A total of five colonies were detected on a residential development site. One colony was detected on the edge of a footpath and the other four colonies were spread out across vacant lots around 200 metres from the first.

INFESTATION DETAILS Incidence Five colonies comprised of nine mounds

Severity Minor – Only one colony contained (female) alates.

Colony assessment One colony contained female alates and four of the colonies contained both worker and reproductive pupae. All colonies contained larvae. The largest mound was approximately 100 cm in length, 60 cm wide and 20 cm high, the second largest mound was 80 cm in length, 75 cm wide and 30 cm high.

Reproductive area of infestation1 No


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(Map 3 shows the surveillance undertaken)

Delineation surveillance commenced on 10 August 2017 and was completed on 16 August 2017. The surveillance was undertaken by field staff and a total of 108 ha was surveyed within the 500m delineation area.


Minimal IGR bait treatment was conducted at the time of detection (out to 10 m surrounding the nests) as per standard winter protocol of application of broadcast bait.


DNI was conducted on 5 and 10 August 2017.

FURTHER RESPONSE DETAILS Surveillance of targeted high risk sites between 500m – 2km of the detection(s)

Surveillance commenced on 15 August 2017 and was completed on 31 August 2017.

640 hectares was surveyed within the 2 km buffer, with no further fire ants detected. This surveillance was undertaken by field staff and completed on 6 September 2017.

COMPLIANCE ACTIONS Fire ant carriers brought on site from within the fire ant biosecurity zones in the past 12 months? Turf/Mulch/Soil/Other e.g. potted plants

It is unclear if fire ant carriers have been brought on site from within the fire ant biosecurity zones (zones) however it appears nothing has been brought on recently as work had halted over the past 18 months.

Numerous enquiries were made with council, site engineers, and site builders to determine what fire ant carriers were brought on site. The civil company developing this estate went into liquidation during development which has impeded enquiries.

Site engineers confirmed the development was a cut and fill site so it is unlikely soil was brought on site.

Field observations indicate that turf appears to have been brought on site for road verges on the estate but a source has not been determined, due to the issues listed above.

Will fire ant carriers be leaving the infested site(s)? Turf/Mulch/Soil/Other e.g. potted plants

Fill may potentially be moved off site when work on the development recommences.

INVESTIGATIONS


Tracing in relation to this detection has proved difficult due to the main civil company going into liquidation prior to the completion of the development. The National Program has collaborated with the Somerset Regional Council and site engineers to establish information about inbound fire ant carriers, however no specific information has been obtained.

The National Program has scheduled ongoing monitoring of the development and a good working relationship has been established with the council in order to better monitor development on the site once work recommences.

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GENETICS

As per standard procedure, genetic analysis has been conducted on the bulk samples extracted from the colony during DNI treatment. Testing has revealed:

New incursion No



Genetic testing may indicate relatedness to other South East Queensland (SEQ) infestation. The samples from the Lowood detection were tested against the whole genetic database (for detections in the last five years) and no matches were found.


Results indicate that the Lowood samples are part of the SEQ Western sub-population of fire ants originally centred in the Amberley/Swanbank area.


Somerset Regional Council advised on 4 August 2017. Holding statement and speaking points provided to Minister’s

Office on 4 August 2017. Media release distributed on 7 August 2017. Local, state and federal representatives notified on 9 August

2017. Notification to residents within 2 / 5 km of the detection

Mail out alert flyers: approximately 4 400 flyers mailed out to residents of Lowood and surrounding suburbs.

Summary of additional engagement activities (events, additional industry or stakeholder training etc)

Ten fire ant awareness signs were erected on six main road sites in and around the suburb of Lowood.

Fire ant information brochures were provided to the Somerset Regional Council for distribution at local council events.

Program activities briefing with Somerset Council. Meetings with relevant council staff, a local landscaping business and Golf course grounds keeping staff to raise awareness of fire ants and encourage community surveillance in risk areas.

BUDGET IMPLICATIONS – COST OF THE LOWOOD DETECTION TO DATE Cost of operational activities $148 504

Cost of compliance activities $1 200

Cost of communication activities $6 800

Cost of genetic activities $3 600

Total estimated cost $160 104

FURTHER RECOMMENDATIONS Operational activities Additional prophylactic bait treatment required out to 500m.

Movement controls Fire ant biosecurity zones – as this infestation does not constitute a reproductive area it is unlikely the suburb of Lowood will be included in fire ant biosecurity zone provisions, however the infestation will be included in the suburbs assessment.

An advisory letter will be drafted to council informing them of the outcomes of Program activities and proposed ongoing compliance monitoring, as well as providing an official statement of request for planning development notification when works recommence.

Tracing investigations None at present

Genetics During September 2017 fire ants were detected in the suburb of

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Prenzlau (within the area one eradication treatment area) which is now the closest known infestation (approximately 9 km away) to the Lowood detection so samples will be compared for relationship to one another.

Communications None at present


Yes

CONCLUSIONS Significance of detection The Significance of the Lowood detection is minor due to the

infestation not constituting a reproductive area of infestation. However, this detection highlights the importance for the National Program to manage large scale developments focusing on monitoring developments on the edge of the SEQ infested area and just beyond the fire ant biosecurity zones.

Possibility of human assisted movement in relation to this significant detection

Based on the current information, the likelihood that the infestation is a direct result of human assisted movement cannot be accurately assessed as no evidence relating to movement of fire ant carriers has been established.

Possibility of nuptial flight in relation to this significant detection

Based on the current information, the likelihood that the infestation is related to nuptial flight spread (more than one flight) is medium (low medium high). Genetic analysis has not revealed any direct links, however the samples are related to the Western sub–population of SEQ infestation which may indicate further spread of infestation in the Lowood direction as part of this sub–population. There may be the possibility that unknown infestation exists between Prenzlau and Lowood.

Future eradication planning It is likely that this detection will be considered as part of eradication treatment planning for area two due to the limited amount of IGR broadcast bait treatment that these infestations have received (to date) and the possibility that this infestation was not the result of a direct human–assisted movement.

It is likely that this area will be included as part of the future remote sensing surveillance program when it recommences as set out in the Ten year plan.

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IMAGES: LOWOOD

Injected nest on sediment control barrier

Surrounding habitat (facing east from the detection on Mallard Street)

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Surrounding habitat (facing west from the detection on Mallard Street)

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Map 1: A map displaying the Lowood detections in proximity nearby known infestation and the Operational Boundary 2017–18.

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Map 2: A map displaying the Lowood detections in relation to each other.

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Map 3: A map displaying the surveillance that has been conducted in relation to the Lowood detections.

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