Scou%ngSugarcaneAphids

Timingeffec%vetreatmenttocontrolsugarcaneaphids(SCA)insorghumdependsonthesizeoftheSCApopula%on.Toes%matethenumberofSCAinafield,followthesestepsforscou%ngthefieldandusetheSamplingProtocol(below)and%plantswithaphids(onback)tomaketreatmentdecisions.

FirstDetec6on:IstheFieldatRisk?

1.  Onceaweek,startonanyedgeofthefieldandexamine3consecu%veplantsforaphids.Walk5morefeetandsample3moreconsecu%veplants.Thisisequalto1“Stop.”

2.  Minimumdistancebetweenstopsshouldbe40-50Sorpaces.Repeatcountsasinpreviousstepforeachstop(total=9),makinga“V”shape.

3.  Averagethenumberofaphidsperupperandlowerleavestodeterminethresholdlevelusing54plants. Sorghumfield

NOTPresent?IfnoSCAarepresent,oronlyafewwingless/wingedaphidsareonupperleaves,con%nueonce-a-weekscou%ng(protocolabove).

IfSCAarefoundonlowerorupper-canopyleaves,begintwice-a-weekscou%ng.UsetheSamplingProtocol(above)and%plantswith50-125aphidsperleaf(onback).

Present?

BrianMcCornack,SarahZukoff,J.P.Michaud&JeffWhitworthwww.entomology.ksu.edu/extension

start

or

Sugarcaneaphidlifestages

A

B

C

D

E

Winglessadult

Nymph

Wingedjuvenile

Castskin

Wingedadult

Sugarcaneaphidlifestages

A

B

C

D

E

3consecu%veplants

~5S

Stop#1

#2

#3

#4

#5

#6

#7

#8

#9

Samplingprotocol

SCAThresholdbyGrowthStageEs%matethepercentage(%)ofinfestedplantswith50-125sugarcaneaphids(SCA)perleaftohelp%mefoliarinsec3cide(Sivanto@4oz/acreorTransform@1oz/acre)applica%ons.

SorghumGrowthStage

30%ofplantsinfestedwith50-125perleaf

(onlyspraytopreventissuesduetohoneydew)

Learnmoreaboutsugarcaneaphidandmapitsprogressat:hUp://myfields.info/pests/sugarcane-aphid

Applyinsec%cidewhen Blacklayer20%ofplantsinfestedwith50-125perleaf

SorghumGrowthandDevelopment.MF3234.Dr.Ciampik,Agronomy,K-StateUniversity

EDDMaps.org

(undersideofleaf)

~50aphids