Twenty sites reported this week for Western NY. European corn borer (ECB)-E was caught at six sites with Batavia and Kirkville again having high trap counts. ECB-Z was caught at five sites and remains in the single digits. Corn earworm (CEW) reported at four sites with the Kirkville and Williamson sites high enough to require a 6 day spray schedule (see table at bottom of post). Both Fall armyworm (FAW) and Western bean cutworm (WBC) are increasing with FAW caught at eight sites and WBC caught at thirteen sites this week.
In addition to the Western sites, eight of the thirteen Eastern sites reported this week. Please see the bottom of this post for a table of trap catches from Eastern NY.
Degree day accumulations for sweet corn trap sites range from 897-1344 (base 50F starting May 1st) with an average of 1144. WBC emergence is predicted to be at 25% when degree day accumulations reach 1319 (see chart below). We are currently still below 25% moth emergence for most of the sites. WBC threshold for fresh market sweet corn is only 1%. It is important to scout late whorl and early tassel-emergence fields as these are most at risk. After hatching larvae will spend a few days feeding on the tassel before moving down to the ear.
Percent WBC moth emergence, data from
University of Nebraska
| Western NY Locations | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Avoca (Steuben Co.) | 0 | 0 | 0 | 0 | 0 | 1037.6 | |
| Avon (Livingston Co.) | NA | NA | NA | NA | NA | 1256.6 | |
| Baldwinsville (Onondaga Co.) | 0 | 1 | 0 | 0 | 13 | 1198.9 | |
| Batavia (Genesee Co.) | 104 | 0 | 1 | 0 | 29 | 897.4 | |
| Belfast (Allegany Co.) | NA | NA | NA | NA | NA | 1016.5 | |
| Bellona (Yates Co.) | 1 | 0 | 0 | 0 | 1 | 1273.6 | |
| Eden (Erie Co.) | 0 | 0 | 1 | 24 | 38 | 1089.6 | |
| Farmington (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 1116.4 | |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | 1273.6 | |
| Kennedy (Chautauqua Co.) | 0 | 1 | 0 | 0 | 1 | 993.4 | |
| King Ferry (Cayuga Co.) | 1 | 1 | 0 | 5 | NA | 1148.6 | |
| Kirkville (Madison Co.) | 20 | 0 | 3 | 0 | 3 | 1192.1 | |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | 1107.5 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | 17 | 1255.3 | |
| Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | 1042.8 | |
| Pavilion (Genesee Co.) | 0 | 0 | 0 | 0 | 13 | 903.3 | |
| Penn Yan (Yates Co.) | 1 | 0 | 0 | 1 | 2 | 1238.0 | |
| Plessis (Jefferson Co.) | 0 | 0 | 0 | 5 | 21 | 1109.2 | |
| Preble (Cortland Co.) | 0 | 0 | 0 | 19 | 3 | 1121.5 | |
| Ransomville (Niagara Co.) | 0 | 0 | 0 | 1 | 9 | 1239.0 | |
| Seneca Castle (Ontario Co.) | 0 | 0 | 0 | 7 | 0 | 1162.1 | |
| Sherwood (Cayuga Co.) | 8 | 1 | 0 | 6 | NA | 1148.6 | |
| Spencerport (Monroe Co.) | 0 | 5 | 0 | 0 | 1 | 1256.6 | |
| Waterport (Orleans Co.) | NA | NA | NA | NA | NA | 1137.2 | |
| Williamson (Wayne Co.) | 0 | 0 | 2 | 0 | 0 | 1073.6 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm DD – Degree Day (base 50F) accumulation since May 1st NA – not available |
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| trap catches for the week of 7.12.16 – 7.19.16 |
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| Eastern NY Locations | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Accord (Ulster Co.) | NA | NA | NA | NA | NA | 1020.1 | |
| Amsterdam (Fulton Co.) | 0 | 0 | 0 | 0 | 0 | 1283.6 | |
| Athens (Greene Co.) | 0 | 0 | 0 | 0 | 2 | 1344.9 | |
| Clifton Park (Saratoga Co.) | 2 | 0 | NA | NA | 1 | 1283.6 | |
| Feura Bush (Albany Co.) | 1 | 2 | 0 | 0 | 0 | 1151.2 | |
| Florida (Orange Co.) | NA | NA | NA | NA | NA | 1270.9 | |
| Greenwich (Washington Co.) | 0 | 6 | 0 | 3 | 4 | 1182.7 | |
| Kinderhook (Columbia Co.) | 0 | 0 | 0 | 0 | 4 | 1231.8 | |
| Peru (Clinton Co.) | NA | NA | NA | NA | NA | 1109.3 | |
| Plattsburgh (Clinton Co.) | NA | NA | NA | NA | NA | 1110.5 | |
| Salem (Washington Co.) | 0 | 0 | 0 | 0 | 0 | 1182.7 | |
| Schoharie (Schoharie Co.) | 5 | 4 | NA | NA | NA | 1168.5 | |
| Stone Ridge (Ulster Co.) | NA | NA | NA | NA | NA | 1020.1 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm DD – Degree Day (base 50F) accumulation since May 1st NA – not available |
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| trap catches for the week of 7.12.16 – 7.19.16 |
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