European corn borer (ECB) trap catches are low at all locations except Owego. Corn earworm (CEW) were caught at 9 locations this week with five sites high enough to require a spray interval of 5 or 6 days. Only two sites reported fall armyworm (FAW) but one of those sites had a catch of 14. Western bean cutworm (WBC) was caught at only 12 sites this week. The high count was at Williamson with 21 moths, but numbers continue to decrease at most locations. Fields that are in the whorl or early tassel stage should be scouted for WBC egg masses with a 4% threshold for processing sweet corn and a 1% threshold for fresh market sweet corn. It takes between 5-7 days WBC eggs to hatch. It is critical that sprays are timed before the larvae have a chance to enter the ear. The egg mass will become purple in color approximately 24 hours before egg hatch. Corn in the tassel emergence stage should be scouted for ECB and FAW damage and larvae.

Location ECB-E ECB-Z CEW FAW WBC Total WBC
to date
Avoca (Steuben Co.) 0 0 0 0 3 9
Avon (Livingston Co.) 0 0 0 NA 4 40
Baldwinsville (Onondaga Co.) 0 0 1 0 0 33
Batavia (Genesee Co.) 0 1 0 0 2 29
Bellona (Yates Co.) 1 0 1 14 5 126
Eden (Erie Co.) NA NA NA NA  NA NA
Farmington (Ontario Co.) 0 0 0 0 0 5
Hamlin (Monroe Co.) 2 4 5 0 5 27
Interlaken (Seneca Co.) 0 0 1 0 2 47
Kennedy (Chautauqua Co.) 0 0 0 0 0 18
King Ferry (Cayuga Co.) NA NA NA NA NA NA
Kirkville (Madison Co.) 9 1 0 0 0 12
LeRoy (Genesee Co.) 0 4 3 0 5 48
Lockport (Niagra Co.) 0 0 2 0 0 3
Oswego (Oswego Co.) 0 1 0 4 0 55
Owego (Tioga Co.) 4 18 0 0 1 6
Penn Yan (Yates Co.) 0 0 1 0 1 44
Pike (Wyoming Co.) NA NA NA NA NA NA
Plessis (Jefferson Co.) 0 1 0 0 11 162
Preble (Cortland Co.) NA NA NA NA NA  NA
Sherwood (Cayuga Co.) NA NA NA NA NA NA
Spencerport (Monroe Co.) 0 0 3 0 3 13
Waterport (Orleans Co.) 0 0 0 0 0 23
Williamson (Wayne Co.) 0 2 2 0 21 84
ECB – European Corn Borer
CEW – Corn Earworm
FAW – Fall Armyworm
WBC – Western Bean Cutworm
NA – not available
trap catches for the week of 8.6.13 – 8.13.13