Only twenty sites reporting this week. European corn borer (ECB)-E was trapped at four sites and ECB-Z was trapped at four sites as well. Corn earworm (CEW) was trapped at seven sites, but only the Baldwinsville site was high enough to be on a 6 day spray schedule (see chart below). Fall armyworm (FAW) was trapped at three sites and Western Bean cutworm (WBC) was trapped at six sites this week.
The degree day accumulations given in the the table below are now based on accumulations beginning May 1st with a base 50°F. This is to help predict WBC emergence. We are just beginning to see WBC at some of the sites with peak emergence usually happening the last week of July into the first week of August.
Michigan State University recommends scouting for WBC egg masses when cumulative trap catch numbers reach 100 moth/trap for field corn, however egg masses have been found in sweet corn when trap catches were still in the single digits. Therefore it is recommended that all fields that are in the whorl or early tassel stage be scouted for egg masses with a 4% threshold for processing sweet corn and a 1% threshold for fresh market sweet corn.
Percent WBC moth emergence, data from
University of Nebraska
| Location | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Accord (Ulster Co.) | NA | NA | NA | NA | NA | 789.5 | |
| Amsterdam (Fulton Co.) | NA | NA | NA | NA | NA | 846.1 | |
| Athens (Greene Co.) | NA | NA | NA | NA | NA | 902.0 | |
| Avoca (Steuben Co.) | NA | NA | NA | NA | NA | 709.4 | |
| Baldwinsville (Onondaga Co.) | 0 | 1 | 2 | 3 | 0 | 790.5 | |
| Batavia (Genesee Co.) | NA | NA | NA | NA | NA | 753.3 | |
| Bellona (Yates Co.) | NA | NA | NA | NA | NA | 866.0 | |
| Clifton Park (Saratoga Co.) | 0 | 0 | 0 | 0 | 0 | 846.1 | |
| Eagle Bridge (Washington Co.) | NA | NA | NA | NA | NA | 773.5 | |
| Eden (Erie Co.) | 1 | 0 | 0 | 0 | 7 | 793.3 | |
| Farmersville Sta. (Cattaraugus Co.) | NA | NA | NA | NA | NA | 742.2 | |
| Farmington (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 732.6 | |
| Feura Bush (Albany Co.) | 0 | 0 | 1 | 0 | 0 | 774.6 | |
| Florida (Orange Co.) | NA | NA | NA | NA | NA | 886.0 | |
| Greenwich (Washington Co.) | 0 | 0 | 1 | 0 | 0 | 773.5 | |
| Hamlin (Monroe Co.) | 1 | 3 | 1 | 0 | 1 | 756.8 | |
| Hurley (Ulster Co.) | 0 | 0 | 1 | NA | NA | 789.5 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | 659.0 | |
| Kinderhook (Columbia Co.) | NA | NA | NA | NA | NA | 842.2 | |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | 817.1 | |
| Kirkville (Madison Co.) | NA | NA | NA | NA | NA | 773.3 | |
| LeRoy (Genesee Co.) | 5 | 2 | 0 | 0 | 4 | 768.4 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | 0 | 734.0 | |
| Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | 654.0 | |
| Pavilion (Genesee Co.) | 0 | 0 | 0 | 0 | 0 | 742.2 | |
| Penn Yan (Yates Co.) | 0 | 1 | 0 | 2 | 1 | 828.0 | |
| Peru (Clinton Co.) | 0 | 0 | 0 | 0 | 0 | 714.0 | |
| Plattsburgh (Clinton Co.) | 0 | 0 | 0 | 1 | 0 | 719.8 | |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA | 709.0 | |
| Preble (Cortland Co.) | 0 | 0 | 0 | 0 | 5 | 755.1 | |
| Ransomville (Niagara Co.) | 0 | 0 | 1 | 0 | 0 | 821.5 | |
| Schoharie (Schoharie Co.) | 0 | 0 | 0 | 0 | 1 | 774.6 | |
| Seneca Castle (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 775.1 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | 817.1 | |
| Stone Ridge (Ulster Co.) | NA | NA | NA | NA | NA | 789.5 | |
| Tivoli (Dutchess Co.) | 2 | 0 | 1 | 0 | 0 | 839.1 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | 713.4 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm DD – Degree Day (base 50F) accumulation beginning May 1st NA – not available |
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| trap catches for the week of 6.27.17 – 7.4.17 |
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