success of the citrus health management area (chma...
TRANSCRIPT
Success of the Citrus Health Management Area (CHMA)
program in Florida
Michael E. Rogers Associate Professor of Entomology
What is a CHMA? • Citrus Health Management Area
• A grower defined grouping of citrus acreage where grower participants coordinate psyllid control efforts and management of pesticide resistance development (coordinated rotation of MOA’s)
• VOLUNTARY PROGRAM IN FLORIDA
Why Coordinate Sprays? • Psyllid movement behavior
– Between groves; daily basis – Can’t be managed on a block-by-block basis
• Short residual activity of pesticides – Airblast application = <12 days true residual – Low-volume application = <3 days true residual
• Pesticide resistance management – Coordinate application of pesticides with same
Mode of Action – Example of localized neonic resistance
Implementation of CHMAs • Coordination provided by:
– University of Florida (UF-IFAS) Extension – Florida Department of Agriculture &
Consumer Services, Division of Plant Industries (FDACS-DPI)
• Grower participation will be necessary but is VOLUNTARY
• 38 CHMAs statewide
• 486,079 acres (commercial citrus)
Current Status
ACP Monitoring Program
• Personnel from CHRP – USDA and FDACS
• Scouting 6,000 blocks on a 3 week cycle
• Equivalent of 106,469 acres scouted each cycle
Observations to Date
• Psyllid populations are decreasing where coordinated applications have been implemented.
www.flchma.org
CHMAs as a research tool
• Real-world situation • Large scale applications • Area-wide monitoring
• Data from CHMA program can be used to
learn more about managing psyllids
• Example…
NE Desoto CHMA (Cycle 3: Sept. 12 – 30, 2011)
• Average ACP per block scouted = 0.8571 • Numbers presented are mean number
psyllids per block scouted within each TRS
0 psyllids <1 psyllid 1-5 psyllids 6-10 psyllids >10 psyllids
Category
Trends Cycle 2-3 0 psyllids for two consecutive cycles Psyllids decreased to lower category Psyllids decrease but remained in same category Psyllids increased but remained in same category Psyllids increased to a higher category
NA
0.6
4.2 0.3 0.5
NA NA
2.0
8.7
NA
0.5
0.4
2.8 0.7 0.3
2.0 2.8 0.2
5.0 1.0
0.3 0.2 0.3
0.4 0.2 0.1 1.0
NPD NPD
NPD
NPD
NPD
NPD
NPD
NPD No previous data
NA Not Available (no counts)
Total = 19 Mean per block = 0.07 Maximum (1 block) = 4
Center Tot. = 7 Mean = 0.03 Max = 3
Total = 68 Mean per block = 0.25 Maximum (1 block) = 18
Total = 40 Mean per block = 0.15 Maximum (1 block) = 5
Total = 100 Mean per block = 0.3676 Maximum (1 block) = 23
NE Corner NW Corner
SE Corner SW Corner
NE Desoto CHMA – Cycle 3 Scouting Summary – “The Edge Effect”
n = 272
Border Sprays Utilized
• Danitol (fenpropathrin) applied as a border spray to all blocks and then around the entire perimeter of the area(and some hotspots) following Cycle 3 scouting (Sept.).
• Followed up with a coordinated aerial application using an OP insecticide (Oct 20).
NE Desoto CHMA (Cycle 3: Sept. 12 – 30, 2011)
• Average ACP per block scouted = 0.8571 • Numbers presented are mean number
psyllids per block scouted within each TRS
0 psyllids <1 psyllid 1-5 psyllids 6-10 psyllids >10 psyllids
Category
Trends Cycle 2-3 0 psyllids for two consecutive cycles Psyllids decreased to lower category Psyllids decrease but remained in same category Psyllids increased but remained in same category Psyllids increased to a higher category
NA
0.6
4.2 0.3 0.5
NA NA
2.0
8.7
NA
0.5
0.4
2.8 0.7 0.3
2.0 2.8 0.2
5.0 1.0
0.3 0.2 0.3
0.4 0.2 0.1 1.0
NPD NPD
NPD
NPD
NPD
NPD
NPD
NPD No previous data
NA Not Available (no counts)
NE Desoto CHMA (Cycle 4: Oct. 3 – 21, 2011)
• Average ACP per block scouted = 0.1744 • Numbers presented are mean number
psyllids per block scouted within each TRS
0 psyllids <1 psyllid 1-5 psyllids 6-10 psyllids >10 psyllids
Category
Trends Cycle 3-4 0 psyllids for two consecutive cycles Psyllids decreased to lower category Psyllids decrease but remained in same category Psyllids increased but remained in same category Psyllids increased to a higher category
NA
4 7
NA
NA NA
NA
0.6
0.6
No change
1.4
0.6 0.8 0.3
0.3
0.5
1.0
Cycle 3 (Sept 12-30) = 0.8571 Cycle 4 (Oct 3-21) = 0.1744
79.6% reduction in ACP from Cycle 3 to Cycle 4
Psyllids per scouted block
NPD No previous data
NA Not Available (no counts)
NPD NPD
Total = 9 (19) Mean per block = 0.04 (0.07) Maximum (1 block) = 3 (4)
Center Tot. = 9 (7) Mean = 0.04 (0.03) Max = 6 (3)
Total = 14 (68) Mean per block = 0.05 (0.25) Maximum (1 block) = 5 (18)
Total = 5 (40) Mean per block = 0.02 (0.15) Maximum (1 block) = 3 (5)
Total = 8 (100) Mean per block = 0.03 (0.3676) Maximum (1 block) = 4 (23)
NE Corner NW Corner
SE Corner SW Corner
NE Desoto CHMA – Cycle 4 Scouting Summary – “The Edge Effect”
Numbers in ( ) are data from Cycle 3
F = 4.73; P = 0.0301 F = 1.52, P = 0.2186
F = 6.26; P = 0.0126 F = 10.3; P = 0.0014
F = 0.16; P = 0.6919
CHMAs as a research tool
• In Florida… – We are utilizing the large amounts of data
collected to test new ideas on a large scale, real-world basis
• In California… – Similar opportunity to validate control methods
under the California growing conditions
CHMA Summary
• Scouting data generated thus far are showing promising results from coordinated spray efforts!
• Coordinated “dormant” sprays should be the starting point for a coordinated spray program
• Participation by all is needed!!!
Acknowledgements
• Citrus Research and Development Foundation • Efforts of FDACS / USDA ACP scouting program • Numerous grower leaders • Citrus Extension Agents • Email questions/comments: [email protected]