Eighteen sites reported this week for Western NY. European corn borer (ECB)-E and ECB-Z were caught at eight sites this week. Corn earworm (CEW) are still increasing with ten sites reporting trap catches this week, with eight sites high enough to require a 4, 5, or 6 day spray schedule (see table at bottom of post). Fall armyworm (FAW) was caught at thirteen sites. Western bean cutworm (WBC) was caught at twelve sites this week. Please see the bottom of this post for a table of Eastern NY trap catches.
Fields that are in 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. Here is a video from Purdue on scouting for WBC egg masses and larvae.
Average sweet corn trap catches for all reporting sites from 5.31.16 – 8.16.16
| Western NY Locations | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Avoca (Steuben Co.) | NA | NA | NA | NA | NA | 1664.5 | |
| Avon (Livingston Co.) | 2 | 0 | 3 | 1 | 3 | 1998.5 | |
| Baldwinsville (Onondaga Co.) | 3 | 1 | 3 | 12 | 15 | 1896.8 | |
| Batavia (Genesee Co.) | 0 | 2 | 11 | 0 | 11 | 1459.9 | |
| Belfast (Allegany Co.) | NA | NA | NA | NA | NA | 1656.6 | |
| Bellona (Yates Co.) | 1 | 2 | 1 | 20 | 0 | 2000.4 | |
| Eden (Erie Co.) | 1 | 0 | NA | 21 | 8 | 1739.5 | |
| Farmington (Ontario Co.) | 0 | 2 | 0 | 2 | 0 | 1791.2 | |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | 1821.4 | |
| Kennedy (Chautauqua Co.) | 0 | 6 | 0 | 0 | 1 | 1590.5 | |
| King Ferry (Cayuga Co.) | 0 | 0 | 1 | 48 | NA | 1827.2 | |
| Kirkville (Madison Co.) | 0 | 1 | 3 | 0 | 0 | 1884.7 | |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | 1781.7 | |
| Oswego (Oswego Co.) | NA | NA | NA | NA | NA | 1992.1 | |
| Owego (Tioga Co.) | 3 | 0 | 0 | 0 | 0 | 1664.9 | |
| Pavilion (Genesee Co.) | 0 | 7 | 5 | 1 | 13 | 1475.6 | |
| Penn Yan (Yates Co.) | 0 | 0 | 0 | 3 | 4 | 1952.5 | |
| Plessis (Jefferson Co.) | 0 | 0 | 2 | 2 | 7 | 1769.0 | |
| Preble (Cortland Co.) | 3 | 0 | 0 | 13 | 13 | 1786.0 | |
| Ransomville (Niagara Co.) | 0 | 0 | 0 | 0 | 3 | 1966.0 | |
| Seneca Castle (Ontario Co.) | 1 | 12 | 0 | 1 | 11 | 1842.8 | |
| Sherwood (Cayuga Co.) | 2 | 0 | 6 | 23 | 5 | 1872.2 | |
| Spencerport (Monroe Co.) | 0 | 0 | 2 | 2 | 0 | 1998.5 | |
| Waterport (Orleans Co.) | NA | NA | NA | NA | NA | 1815.5 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | 1728.6 | |
| 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 8.9.16 – 8.16.16 |
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| Eastern NY Locations | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Accord (Ulster Co.) | 2 | 0 | 1 | 0 | 0 | 1634.5 | |
| Amsterdam (Fulton Co.) | 0 | 0 | 0 | 0 | 1 | 1977.2 | |
| Athens (Greene Co.) | 2 | 0 | 0 | 0 | 0 | 2063.9 | |
| Clifton Park (Saratoga Co.) | 2 | 3 | NA | 0 | 3 | 1977.2 | |
| Feura Bush (Albany Co.) | 2 | 0 | 1 | 0 | 4 | 1788.3 | |
| Florida (Orange Co.) | NA | NA | NA | NA | NA | 1992.7 | |
| Greenwich (Washington Co.) | 3 | 0 | 0 | 4 | 2 | 1831.2 | |
| Kinderhook (Columbia Co.) | 0 | 0 | 2 | 14 | 2 | 1922.2 | |
| Peru (Clinton Co.) | NA | NA | NA | NA | NA | 1719.1 | |
| Plattsburgh (Clinton Co.) | NA | NA | NA | NA | NA | 1712.9 | |
| Salem (Washington Co.) | NA | NA | NA | NA | NA | 1931.2 | |
| Schoharie (Schoharie Co.) | 4 | 2 | NA | 0 | 0 | 1814.0 | |
| Stone Ridge (Ulster Co.) | 1 | 0 | 0 | 0 | 0 | 1634.2 | |
| 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 8.9.16 – 8.16.16 |
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