2016 micigan pgr v26 ho - great lakes...
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Cutting-Edge PGRs
Wednesday afternoon 2:00 pm
Where: River Overlook (upper level) Room C & D
Research at NC State has focused on optimizing plant growth regulator (PGR) performance
and determining the additional benefits of PGRs. Learn about the latest updates on PGR
combinations, increasing foliar spray efficacy by leaf rewetting, adherence of PGRs to plastic
pots, overcoming low doses in irrigation water, and how the use of PGRs actually make you
money by reducing water and fertilizer use. Come hear how to enhance your best
management practices with PGRs.
MI Recertification credits: 1 (COMM CORE, PRIV CORE)
OH Recertification credits: 0.5 (presentations as marked)
Moderator: Heidi Lindberg, Extension Educator, MSU Extension, Nazareth, MI
2:00 pm Cutting-Edge PGRs (OH: 6D, 0.5 hr)
Brian Whipker, Horticultural Science Dept., North Carolina State Univ.
2:50 pm Session Ends
Sponsored by Fine Americas, Inc.
11/20/16
1
Cutting Edge PGRs Brian Whipker, NC State
Cu#ng&Edge&PGRs&&
Brian&Whipker&Floriculture*Extension*and*Research*
Applica9on&of&Fresco&Foliar&Sprays&for&Counterac9ng&Paclobutrazol&Residue&in&
Irriga9on&Water&Brian&Whipker&
Floriculture&Extension&and&Research&
Research Project Sponsored by:
When&low&concentra9ons&of&paclobutrazol&are&in&irriga9on&water,&plant&growth&is&less&(leF&to&right:&0,&5,&10&or&50&parts&per&
billion).&
Paclo (ppb) 0 5 10 50
Begonia ‘Super Olympia Rose’
Top view
Side view
The&applica9on&of&Fresco&foliar&sprays&(ppm)&counteracted&the&low&level&of&paclobutrazol&(ppb)&in&the&irriga9on&water.&
Fresco (ppm) 0 1 3 6
50
10 5 0
Paclo (ppb)
Conclusions&
• Low&dose&concentra:on&of&paclo&resulted&in&controlled&growth&of&wax&begonias.&– As&the&rate&of&paclo&increased&from&0&to&50&ppb&the&plants&were&smaller&in&height.&
– Plant&diameter&was¬&significant&with&the&interac:on.&
&
Conclusions&• Foliar&applica:ons&of&Fresco&at&1,&3&or&6&counteracted&the&paclo&effect.&&– With&5&ppb&paclo,&two&applica:ons&of&1&ppm&Fresco&were&sufficient.&
– With&10&to&50&ppb&paclo,&two&applica:ons&of&3&ppm&Fresco&was&op:mal.&
• A&double&applica:ons&of&6&ppm&Fresco&may&be&excessive.&
11/20/16
2
Cutting Edge PGRs Brian Whipker, NC State
Bedding&Plants&Augeo&Pre)plant&Liner&Soaks&
Brian&Whipker&Floriculture&Extension&and&Research&
Augeo&Liner&Soaks&(ppm)&
Augeo&>400&ppm&resulted&in&smaller&plants&(37&days&aSer&treatment)&
Petunia ‘Pretty Much Picasso’
&&&0&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&400&
&&&800&&&&&&&&&&&&&&&&&&&&&&&&&&&&&1600&
Augeo&Liner&Soaks&(ppm)&
Augeo&>800&ppm&resulted&in&growth&control&(24&days&aSer&treatment)&
‘Ipomoea ‘Sweet Caroline Light Green’
&&&0&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&400&
800&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&1600&
Augeo&Liner&Soaks&(ppm)&
Augeo&resulted&in&increased&branching&(38&days&aSer&treatment)&
Coleus ‘Lifelime Color Blaze’
&&&0&&&&&&&&&&&&&&&&&&&&400&&&&&&&&&&&&&&&&&&&&&&800&&&&&&&&&&&&&&&&&&&&1600&
Conclusions&• The&largest&variable&when&determining&the&suitability&of&
Augeo&preWplant&liner&soaks&is&plant&type.&– Coleus:&~800&ppm&– Impa:ens&(seed):¬&recommended&– Ipomoea:&400&ppm&or&a&li[le&higher,&but&below&800&ppm&– Lobularia&‘Snow&Princess’:¬&recommended&– Petunia&(cu^ng):&400&to&800&ppm&to&control&growth&– Vinca:&800&ppm&increased&branching,&but&delayed&flowering&
• Addi:onal&trialing&should&concentrate&on&rates&between&400&to&800&ppm&
-End-
Coleus&Florel&Pre)plant&Liner&
Soaks&
Brian&Whipker&Floriculture&Extension&and&Research&
11/20/16
3
Cutting Edge PGRs Brian Whipker, NC State
Florel&Liner&Soaks&(ppm)&
Florel&>125&ppm&resulted&in&shorter&plants&(37&days&aSer&treatment)&
Coleus ‘Keystone Kopper’
&&&0&&&&&&&&&&&&&&&&&&&&&&125&&&&&&&&&&&&&&&&&&&&250&&&&&&&&&&&&&&&&&&&&&500&Conclusions&
• Based&on&this&experiment&with&‘Keystone&Kopper’&coleus,&a&rate&of&125&ppm&applied&as&a&preWplant&liner&soak&controlled&growth&by&23%.&&
• Branching&appears&to&be&enhanced&with&250&to&500&ppm.&
• This&provides&a&beginning&rate&for&growers&wishing&to&conduct&their&own&trials&with&other&cul:vars&and&at&other&loca:ons.&
-End-
Dazide&&PreWplant&Liner&Soaks&
Brian&Whipker&and&Ingram&McCall&
Floriculture&Extension&and&Research&
Dazide&Liner&Soaks&
0 5,000 10,000 15,000 20,000
‘Potunia Plus Pinkalious’
Conclusions&• Daminozide&(Dazide)&has&root&contact&ac:vity.&
– Liner&soaks&offer&direct&contact&of&daminozide&with&the&root&system.&
– Daminozide&adheres&to&and&is&inac:vated&by&substrate&contact,&which&makes&drenches&imprac:cal.&
• If&labeled,&daminozide&liner&soaks&may&be&an&alterna:ve&for&northern&growers&where&a&moderate°ree&of&control&is&desired.&– For&southern&growers,&Paclo&liner&soaks&are&3X&more&cost&effec:ve.&
Ethephon&• Florel&(3.9%)&has&been&the&industry&standard&for&a&number&of&years.&
• Collate&(21.7%)&introduced&by&Fine&Americas.&– Collate&drench&label&is&being&developed.&
• Other&formula:ons&being&marketed&to&the&ornamental&market.&
11/20/16
4
Cutting Edge PGRs Brian Whipker, NC State
Collate&drenches&(in&ppm),&photographs&taken&(a)&2&weeks&aSer&applica:on&and&(b)&at&bloom.&&&
125 250 500 Collate ppm
0
�Vista Bubblegum�
125 250 500 0
A
B
Collate&drenches&(in&ppm),&photographs&taken&at&bloom.&&&
125 250 500 0
�Americana Dark Red�
Ethephon&• Applica:on&Rates&
• Sprays:&250&to&500&ppm&(on&label)&• Drench:&50&to&250&ppm&&• Liner&Soaks:&125&to&500&ppm&&
– Species&and&cul:vars&vary&in&response,&thus&you&have&to&conduct&your&own&rate&trials.&
• Reminders&– Acidify&the&solu:on&to&pH&4&to&5.&– Avoid&applica:ons&to&stressed&plants.&
Exploring&ThreeVWay&Interac9on&of&Dazide&+&Configure&+&Collate&
Foliar&Sprays&Brian&Whipker&
Floriculture&Extension&and&Research&
Effect&of&3Vway&foliar&sprays&on&new&growth&Cali
‘Volcano Pink’
- +Wk3 + Wk5
Wk 3: provided excessive growth control Wk 5: some control
Effect&of&3Vway&foliar&sprays&on&new&growth&Cali
‘Volcano Pink’
Untreated
Wk 3: provided excessive growth control
Wk 5: some control
+ Wk5
+ Wk3
11/20/16
5
Cutting Edge PGRs Brian Whipker, NC State
Conclusions&W&Cali&• An&early&3Wway&spray&acted&as&a&pinching&agent&for&cali.&– Roo:ng&was&nega:vely&affected.&– Control&extended&un:l&bloom,&with&smaller&plants.&
• A&transplant&applica:on&provided&growth&control.&
Effect&of&3Vway&foliar&sprays&on&new&growth&
Wk 3: provided growth control Wk 5: provided growth control
- +Wk3 +Wk5
Coleus ‘Grand Via’
Conclusions&W&Coleus&• An&early&3Wway&spray&acted&as&a&pinching&agent&for&coleus.&– Control&extended&un:l&plants&were&marketable&size,&with&smaller&plants.&
• A&transplant&applica:on&provided&growth&control,&but&the&rates&used&were&excessive.&
Conclusions&• Suitability&varies&by&species&and&:ming.&• Extensive&trialing&required&by&grower&to&determine&the&usefulness&of&this&3WWay&applica:on&to&each&specie&and&cul:var.&
Thanks&expressed&to&Dümmen&Orange&for&supplying&unrooted&cu@ngs&
Study&Recommenda:ons:&&ThreeWWay&Sprays&
OK&/&PROMISING&/&
MAYBE?&
Gomphrena&??&Lantana??&
NG&Impa:ens&Portulaca??&Scaevola??&
NO&
Bacopa&Calibrachoa&
Dahlia&Portulaca&Scaevola&
YES&
Angelonia&Coleus&
Coreopsis&Petunia&
For Applications ~ week 3 of rooting.
Study&Recommenda:ons:&&ThreeWWay&Sprays&
OK&/&PROMISING&/&
MAYBE?&
Coleus?&Coreopsis?&
NG&Impa:ens?&Petunia?&
NO&
Bacopa&Dahlia&
Gomphrena&Lantana&Portulaca&Scaevola&
YES&
Angelonia?&Calibrachoa&
For Applications ~ week 5, two weeks after transplant.
11/20/16
6
Cutting Edge PGRs Brian Whipker, NC State
Enhanced&leaf&green&colora9on&and&zona9on.&
PGR applied
Enhanced&leaf&colora9on&possible&with&some&species.&
No Plant growth regulator applied
20 ppm Piccolo 10XC applied
April 30
Plumbago ‘Imperial Dark Blue’
Substrate Drenches
Enhanced&Petal&Colora:on&&
4 mg Piccolo 10XC applied
1000 ppm Collate applied
2 mg Topflor applied
Untreated Control
PGR Electronic Resources
• e-GRO Rate App – Contains rate
recommendations based on label rates, university trials, and supplier recommendations.
– Web-based app (database driven)
www.e-gro.mobi/index.php
PGR Electronic Resources
• e-GRO Rate App – Contains rate
recommendations based on label rates, university trials, and supplier recommendations.
– Web-based app (database driven)
www.e-gro.mobi/index.php
PGR Electronic Resources
• PGR Mix Master – Brian Krug partnered with
Fine Americas to develop a PGR mixing rate mobile app.
– Available for the iPhone®, Android®, and Blackberry®.
– Calculates mixing rates for sprays and drenches for most of the common PGRs.
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