Seventeen sites reported this week with European corn borer (ECB)-E caught at two sites, Hurley and Seneca Castle, both with high trap catches. ECB-Z was caught at three sites, Hurley, Seneca Castle and Feura Bush. Four sites reported corn earworm (CEW) with three of those sites high enough to be on a 5 or 6 day spray interval (see table at bottom of post). No fall armyworm (FAW) or western bean cutworm (WBC) were caught at any of the reporting sites.
As I mentioned last week, there are six sites that also have a trap for the hybrid ECB, marked with an asterisk. Only four of the six sites have traps set at this time. Of those four sites three caught the hybrid ECB this week. Next to each site I have also included the accumulated degree days (base 86/50). Most sites are in the egg laying stage with some entering the peak spring moth flight (see table below).
When scouting for ECB focus on the emerging tassel. Separate the leaves and look down into the tassel for any signs of feeding, frass or larvae (see photos). The threshold for ECB and FAW is 15% infested plants at tassel emergence.
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- ECB egg mass
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- Scouting tassel emergence sweet corn
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- ECB feeding damage within whorl
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- ECB larva inside whorl next to tassel
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- ECB larva in tassel
| Location | ECB-E | ECB-Z | Hybrid | CEW | FAW | WBC | DD | |
| Western NY trap Catch |
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| Attica (Wyoming Co.) | NA | NA | NA | NA | NA | NA | 517 | |
| Baldwinsville (Onondaga Co.) | NA | NA | NA | NA | NA | NA | 562 | |
| Batavia (Genesee Co.) | 0 | 0 | NA | 0 | 0 | 0 | 535 | |
| Bellona (Yates Co.)* | NA | NA | NA | NA | NA | NA | 544 | |
| Brockport (Monroe Co.) | 0 | 0 | NA | 0 | 0 | 0 | 571 | |
| Eden (Erie Co.) | 0 | 0 | NA | 3 | 0 | 0 | 567 | |
| Farmington (Ontario Co)* | 0 | 0 | 3 | 0 | 0 | 0 | 565 | |
| Geneva (Ontario Co.)* | NA | NA | NA | NA | NA | NA | 546 | |
| Hamlin (Orleans Co.) | NA | NA | NA | NA | NA | NA | 531 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | NA | 540 | |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 504 | |
| Kirkville (Madison Co.) | NA | NA | NA | NA | NA | NA | 554 | |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | NA | 530 | |
| Lyndonville (Orleans Co.) | 0 | 0 | NA | 0 | 0 | 0 | 509 | |
| Oswego (Oswego Co.) | 0 | 0 | NA | 0 | 0 | 0 | 431 | |
| Panama (Chautauqua Co.) | 0 | 0 | NA | 1 | 0 | 0 | 479 | |
| Penn Yan (Yates Co.)* | 0 | 0 | 0 | 0 | 0 | 0 | 521 | |
| Portville (Cattaraugus Co.) | NA | NA | NA | NA | NA | NA | 501 | |
| Preble (Cortland Co.) | NA | NA | NA | NA | NA | NA | 381 | |
| Ransomville (Niagara Co.) | 0 | 0 | NA | 0 | 0 | 0 | 552 | |
| Seneca Castle (Ontario Co.)* | 33 | 1 | 4 | 0 | 0 | 0 | 515 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 501 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | NA | 463 | |
| Eastern NY trap Catch |
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| Accord (Ulster Co.) | NA | NA | NA | NA | NA | NA | 675 | |
| Amsterdam (Fulton Co.) | NA | NA | NA | NA | NA | NA | 529 | |
| Feura Bush (Albany Co.) | 0 | 1 | NA | NA | 0 | 0 | 635 | |
| Florida (Orange Co.) | 0 | 0 | NA | 0 | NA | NA | 677 | |
| Greenwich (Washington Co.) | NA | NA | NA | NA | NA | NA | 583 | |
| Hurley (Ulster Co.)* | 35 | 9 | 2 | 2 | 0 | 0 | 632 | |
| Kinderhook (Columbia Co.) | NA | NA | NA | NA | NA | NA | 643 | |
| Melrose (Rensselear Co.) | NA | NA | NA | NA | NA | NA | 631 | |
| Middleburgh (Schoharie Co.) | NA | NA | NA | NA | NA | NA | 647 | |
| Peru (Clinton Co.) | 0 | 0 | NA | 0 | 0 | 0 | 483 | |
| Plattsburgh (Clinton Co.) | 0 | 0 | NA | 0 | 0 | 0 | 515 | |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA | NA | 533 | |
| South Colton (St. Lawrence Co.) | NA | NA | NA | NA | NA | NA | 407 | |
| Stone Ridge (Ulster Co.) | 0 | 0 | NA | 5 | NA | NA | 613 | |
| Ticonderoga (Essex Co.) | 0 | 0 | NA | 0 | 0 | 0 | 510 | |
| Tivoli (Dutchess Co.) | NA | NA | NA | NA | NA | NA | 685 | |
| Unadilla (Delaware Co.) | NA | NA | NA | NA | NA | NA | 474 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (base 86/50) accumulation Climate Smart Farming |
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| trap catches for the week of 6.2.20 – 6.9.20 |
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