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PestWatch Report for August 19, 2020

PestWatch Report for August 19, 2020

By Shelby Fleischer

Pyrethroid resistance can be a problem. Use materials with a low bee toxicity rating (‘Bee TR’ in the Veg Guide) when bees are working tassels. Along with controlling worm pests, scout for BMSB, sap beetles, or silk-clipping beetles, and consider pyrethroids or a premix of a worm material and pyrethroid (eg., Besiege or Elevest) for those species.

  • CEW counts continue to be high. Circle color aligns with CEW thresholds; size is proportional to catch.
  • ECB counts are low, but with an isolated spot in Susquehanna County, and last week in Union County.
  • FAW is showing up in isolated hot spots, especially in Erie County, and less so in Indiana and Mifflin counties. FAW makes large, ragged feeding patterns.

7-day moving average: catch/nights trapping, divided by the number of nights with data, times 7. Weeks, where all the average-catch-per-night values are nulls, are treated as if no data exist for that week. Empty cell = no trap for that site. Bold text are sites above CEW threshold or hotspots for ECB or FAW. Italics suggest tighter spray intervals.

CountyTown/FarmCEWCEWCEWECBECBECBFAWFAWFAW
  5-Aug12-Aug19-Aug5-Aug12-Aug19-Aug5-Aug12-Aug19-Aug
BlairTyrone711144201025
BucksBedminster3530000   
CentreHarner4698900001844
CentreRock Springs186830000515
ClintonLoganton1null24nullnull0   
ErieDudas Farm123212   738
ErieMason20930   221529
IndianaBrush Valley1932118   206
IndianaCreekside407613600012813
JuniataHappy Breeze2364null54null42null
LackawannaRansom0nullnull3nullnull   
LancasterLandisville223124015010
LancasterNeffsville174131000000
LancasterNew Danville258285001000
LehighGermansvillenull174null00null00
LuzerneDrums0106475115010
LuzernePlains82074240   
LycomingLinden345null   247null
LycomingMontoursville8165null   21null
LycomingMuncy3887null   63null
MifflinStreamside554558312402012
MontgomerySouderton7207      
MontourWashingtonville3231null30null   
SchuylkillTower City0nullnull1nullnull0nullnull
SusquehannaLaRue Farmnull45null1017   
UnionOberholtzer1528345   
UnionLewisburg   1223   
WashingtonVenetia92200183      
YorkYork3710787000320

Thresholds

Reproductive (tassel/silk) and late vegetative corn attracts moths. Shorten spray schedules when populations increase. If CEW is not a problem, then consider ECB.

Thresholds Based on CEWCatch Per WeekSpray Frequency (Days)
Almost absent1–137+
Very low14–355–6
Low36–704–5
Moderate71–3493–4
High> 3502–3
Thresholds Based on ECBCatch Per WeekSpray Frequency (Days)
Almost absent< 147+
Very low15–356
Low36–705
Moderate> 704

 

Source : psu.edu