Ten sites reported European corn borer (ECB)-E and seven had ECB-Z. ECB-E numbers were again very high in the same two locations (Batavia and Farmington) as last week. Please refer to the scouting guidelines on this page, Scouting and Threshold Information, for information on how and when to scout for ECB.

Four of the sixth sites reporting Corn earworm (CEW) were over threshold, indicating a need for a spray, please see the chart at the bottom of this page to determine correct spray interval for your field. Four sites reported fall armyworm (FAW).

Western bean cutworm (WBC) was caught at nearly all reporting sites this week (20/21) with a high count of 46. I scouted for WBC in a  field that had 17 moths caught and found no eggs on the 100+ pre-tassel sweet corn plants that I scouted. The degree day accumulation (May 1st, base 50°F) for sweet corn trap network sites ranges from 1126-1500 with an average of 1328. Most areas are just above 25% moth emergence based on accumulated degree days.  Degree day forecasts pertain only to local populations, the migrant population is much more unpredictable.

Location ECB-E ECB-Z CEW FAW WBC
Avoca (Steuben Co.) 0 2 0 0 6
Avon (Livingston Co.) 2 0 0 0 14
Baldwinsville (Onondaga Co.) 0 0 1 0 18
Batavia (Genesee Co.) 21 0 1 1 7
Bellona (Yates Co.) 3 1 0 0 46
Eden (Erie Co.) 0 0 0 0 9
Farmington (Ontario Co.) 16 0 0 0 2
Hamlin (Monroe Co.) 0 1 2 0 9
Interlaken (Seneca Co.) 0 0 0 0 17
Kennedy (Chautauqua Co.) 0 0 0 0 7
King Ferry (Cayuga Co.) 4 1 2 1 5
Kirkville (Madison Co.) 4 0 0 0 3
LeRoy (Genesee Co.) 4 2 6 0 8
Lockport (Niagra Co.) 0 0 0 0 0
Oswego (Oswego Co.) 1 7 0 0 19
Owego (Tioga Co.) 0 0 0 1 3
Penn Yan (Yates Co.) 3 0 0 1 14
Pike (Wyoming Co.) NA NA NA NA NA
Plessis (Jefferson Co.) 5 0 0 0 21
Preble (Cortland Co.) 0 0 0 0 1
Sherwood (Cayuga Co.) NA NA NA NA NA
Spencerport (Monroe Co.) 0 0 0 0 4
Waterport (Orleans Co.) NA NA NA NA NA
Williamson (Wayne Co.) 0 2 3 0 15
ECB – European Corn Borer
CEW – Corn Earworm
FAW – Fall Armyworm
WBC – Western Bean Cutworm
NA – not available
trap catches for the week of 7.23.13 – 7.30.13