Recent Work in Recent Work in Citrus EntomologyCitrus Entomology

David KernsDavid KernsUniversity of ArizonaUniversity of Arizona

Yuma Agricultural CenterYuma Agricultural CenterYuma, AZYuma, AZ

Citrus Citrus ThripsThrips ResearchResearch

Particle FilmsParticle Films

Particle Films Particle Films vsvs Standard, 2002Standard, 2002

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12Surround Snow Standard

1Surround 50 lbs/ac, 2Snow 80 lbs/ac, 3Baythroid 6.4oz/ac4Danitol 21 oz/ac, 5Success 8oz/ac

1, 2, 3 1, 2 1+4, 2+4, 4 5

1" fruit

Particle FilmsParticle Films

Snow Surround Standard

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1st Harvest, #9 Strip Harvest

PyrethroidPyrethroid UseUse

Use only in early Use only in early Spring.Spring.Do not use when Do not use when temperatures exceed temperatures exceed 9595ooF.F.

Rotation Test, 2003Rotation Test, 2003

Surround 35 lbsSurround 35 lbsSurround 35 lbsSurround 35 lbsSurround 35 lbsSurround 35 lbsUntreatedUntreatedUntreatedUntreatedUntreatedUntreated

Success 6 ozSuccess 6 ozSuccess 6 ozSuccess 6 ozCarzolCarzol 1.25 lbs1.25 lbsSuccess 6 ozSuccess 6 ozCarzolCarzol 1.25 lbs1.25 lbsSuccess 6 ozSuccess 6 ozCarzolCarzol 1.25 lbs1.25 lbsSuccess 6 ozSuccess 6 ozDimethDimeth. 2 lbs. 2 lbs--aiaiCarzolCarzol 1.25 lbs1.25 lbsSuccess 6 ozSuccess 6 ozBaythroidBaythroid 6.4 oz6.4 ozCarzolCarzol 1.25 lbs1.25 lbsSuccess 6 ozSuccess 6 ozDanitolDanitol 21oz21ozApplication #3Application #3Application #2Application #2Application #1Application #1

Rotation Test, 2003Rotation Test, 2003* Success*Surround *Success

05/05/03 05/19/03 06/02/03 06/16/03 06/30/03

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30Untreated Danitol Baythroid Dimethoate Success Carzol Surround

*Carzol

*Carzol*Success

PyrethroidPyrethroid Efficacy 2003Efficacy 2003

05/05/03 05/19/03 06/02/03 06/16/03 06/30/03

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Predaceous MitesPredaceous Mites

Tydeus sp.

Yuma Spider MiteYuma Spider Mite

Yuma Spider MiteYuma Spider Mite

Yuma Spider MiteYuma Spider MiteRecommendationsRecommendations

Ignore or conserve them when relegated to the Ignore or conserve them when relegated to the leaves.leaves.–– Predaceous habit far outweighs minor leaf damage.Predaceous habit far outweighs minor leaf damage.–– Mature citrus can withstand a great deal of foliar Mature citrus can withstand a great deal of foliar

damage.damage.

Treat with a Treat with a miticidemiticide when they move to the fruit when they move to the fruit in significant numbers.in significant numbers.–– Probably 1 mite per 10 fruit, before May.Probably 1 mite per 10 fruit, before May.–– Probably 2 to 5 mites per fruit, May Probably 2 to 5 mites per fruit, May -- July.July.

New New PyrethroidPyrethroid RecommendationsRecommendations

Use only one Use only one application of any application of any pyrethroidpyrethroid per per season.season.Use Use DanitolDanitol for for thripsthripscontrol only when control only when mites are also mites are also problematic.problematic.Use Use BaytrhoidBaytrhoid when when targeting only targeting only thripsthrips..

New New ThripsThrips Control MethodsControl Methods

Experimental InsecticidesExperimental Insecticides

200 & 200 & 400 400 gg--ai/haai/ha

Feeding Feeding paralysisparalysis

Not Not reportedreported

LabsLabs--140140--F01F01

0.15, 0.20 & 0.15, 0.20 & 0.30 lbs0.30 lbs--aiai/ac/ac

Not reportedNot reportedPyridanilPyridanilSS--18121812

2 lbs2 lbs--aiai/ac/acOctopamineOctopamineneuroreceptorneuroreceptorinhinh..

Rosemary Rosemary oiloil

HexacideHexacide

RatesRatesMOAMOAChemicalChemicalNameName

ExperimentalsExperimentals TestTest

05/05/03 05/19/03 06/02/03 06/16/03 06/30/03

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25Untreated Hexicide S-1812(L) S-1812(M) S-1812(H) Labs-140(L) Labs-140(H) Success

Woolly Whitefly Woolly Whitefly ((AleurothrixusAleurothrixus floccocusfloccocus))

Foliar InsecticidesFoliar Insecticides

Foliar WWF TestFoliar WWF Test

UntreatedUntreated

16 oz/ac + 2 lbs16 oz/ac + 2 lbs--aiai/ac/acDanitolDanitol + + DimethoateDimethoate

0.5 lbs/ac0.5 lbs/acApplaudApplaud

19 oz/ac19 oz/acProvadoProvado

10 oz/ac10 oz/acEsteemEsteem

RateRateTreatmentTreatment

Impact on EggsImpact on Eggs

8/18/03 8/25/03 9/1/03 9/8/03 9/15/03 9/22/03

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Untreated Esteem 10ozApplaud 0.5 lbsProvado 19ozDan 16oz + Dim 2 LAA

Impact on NymphsImpact on Nymphs

8/18/03 8/25/03 9/1/03 9/8/03 9/15/03 9/22/03

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350Untreated Esteem 10ozApplaud 0.5 lbsProvado 19ozDan 16oz + Dim 2 LAA

Impact on Impact on EclosedEclosed PupaePupae

8/18/03 8/25/03 9/1/03 9/8/03 9/15/03 9/22/03

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Untreated Esteem 10ozApplaud 0.5 lbsProvado 19ozDan 16oz + Dim 2 LAA

Admire for Woolly WhiteflyAdmire for Woolly Whitefly

Admire at 16 & 32 oz/ac injected 8 inches at 9 gal/ac volume

Impact on AdultsImpact on Adults

DAT

pre 23 30 38 44 50 58 64 71 78 84

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Injected6/23/03

Impact on EggsImpact on Eggs

DAT

pre 23 30 38 44 50 58 64 71 78 84

Egg

s per

leaf

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10

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50Untreated Adm-16oz Adm-32oz

Injected6/23/03

Impact on NymphsImpact on Nymphs

DAT

pre 23 30 38 44 50 58 64 71 78 84

Nym

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10Untreated Adm-16oz Adm-32oz

Injected6/23/03

Impact on Impact on EclosedEclosed PupaePupae

DAT

pre 23 30 38 44 50 58 64 71 78 84

Ecl

osed

pup

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40

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60Untreated Adm-16oz Adm-32oz

Injected6/23/03

Woolly Whitefly / Citrus Woolly Whitefly / Citrus ThripsThripsPopulation DynamicsPopulation Dynamics

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Woolly whiteflyCitrus thrips

J F M A M J J A S O N D

Citr

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Key to WWF Management is Key to WWF Management is BiocontrolBiocontrol

There are a number of There are a number of naturally occurring naturally occurring parasitoids that prey on parasitoids that prey on WWF in Arizona.WWF in Arizona.An An EretmocerusEretmocerus sp. sp. appears to be the primary appears to be the primary parasitoid, and appears parasitoid, and appears to be key to sustainable to be key to sustainable WWF management.WWF management.A number of predators A number of predators including lacewings and including lacewings and mites have been mites have been observed feeding on observed feeding on WWF.

Eretmocerous sp.

WWF.

Insecticide ChoicesInsecticide Choices

Current recommendations for Current recommendations for woolly whitefly managementwoolly whitefly management

SpringSpring–– use oils to suppress WWF use oils to suppress WWF

populations.populations.–– avoid harsh insecticides for avoid harsh insecticides for

thrips when WWFs are thrips when WWFs are present, ie use Success.present, ie use Success.

SummerSummer–– primarily adults present primarily adults present -- use use

ProvadoProvado or or DanitolDanitol / OP tank / OP tank mixes (hard on mixes (hard on beneficialsbeneficials).).

–– when large numbers of when large numbers of immatures begin to appear immatures begin to appear ––use Esteem or Applaud.use Esteem or Applaud.

Use only ground applications.Use only ground applications.On large trees or tight groves, On large trees or tight groves, use high spray volumes 200use high spray volumes 200--400 400 gpagpa.

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Woolly whiteflyCitrus thrips

J F M A M J J A S O N D

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Citrus Citrus MealybugMealybug ManagementManagement

Traditional ControlTraditional Control

Interfere with natural Interfere with natural controlcontrol–– AnagraphusAnagraphus sp.sp.

LorsbanSupracideLorsbanSupracide

MealybugMealybug TestTest

UntreatedUntreated

2 lbs/ac2 lbs/acApplaud Applaud –– 2 applications2 applications

1 lbs/ac1 lbs/acApplaud Applaud –– 2 applications2 applications

2 lbs/ac2 lbs/acApplaud Applaud –– 1 application1 application

1 lbs/ac1 lbs/acApplaud Applaud –– 1 application1 application

RateRateTreatmentTreatment

Applaud EfficacyApplaud Efficacy

6/16/03 6/30/03 7/14/03 7/28/03 8/11/03 8/25/03

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