NY Sweet Corn Trap Network Report 6.16.20
Twenty-three sites reported this week with European corn borer (ECB)-E caught at four sites. ECB-Z was caught at three sites. Five sites reported corn earworm (CEW) with four of those sites high enough to be on a 4, 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. One site, Seneca Castle, caught 10 ECB hybrids. This is out of 5 sites that currently have hybrid traps set.
Based on the accumulated degree days (base 86/50), most sites are in the peak spring moth flight and entering the first generation treatment period (see table below).
True armyworm and ECB larvae were found at one site scouted this week. True armyworm damage looks very similar to FAW damage (see photos below). Scouting of bare ground sweet corn should begin when the tassel starts to emerge. When scouting focus on the emerging tassel. Separate the leaves and look down into the tassel for any signs of feeding, frass or larvae. The threshold for ECB and FAW is 15% infested plants at tassel emergence. I scouted a field in early tassel today that was just over the 15% threshold. To help you scout your fields please view the new video titled How to Scout Fresh Market Sweet Corn. This video will show you how and when to scout sweet corn using the Sweet corn scouting form (pdf).
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- True armyworm larva, does not have inverted ‘Y’.
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- True armyworm feeding damage.
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- Fall armyworm larva, note the inverted ‘Y’ om head capsule.
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- Fall armyworm feeding damage and frass.
| Location | ECB-E | ECB-Z | Hybrid | CEW | FAW | WBC | DD | |
| Western NY trap Catch |
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| Attica (Wyoming Co.) | 1 | 0 | NA | 6 | 0 | 0 | 614 | |
| Baldwinsville (Onondaga Co.) | NA | NA | NA | NA | NA | NA | 659 | |
| Batavia (Genesee Co.) | 0 | 0 | NA | 0 | 0 | 0 | 628 | |
| Bellona (Yates Co.)* | NA | NA | NA | NA | NA | NA | 645 | |
| Brockport (Monroe Co.) | 0 | 0 | NA | 0 | 0 | 0 | 666 | |
| Eden (Erie Co.) | 0 | 0 | NA | 2 | 0 | 0 | 664 | |
| Farmington (Ontario Co)* | 0 | 0 | 0 | 0 | 0 | 0 | 667 | |
| Geneva (Ontario Co.)* | 0 | 0 | 0 | 0 | 0 | 0 | 645 | |
| Hamlin (Orleans Co.) | NA | NA | NA | NA | NA | NA | 625 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | NA | 634 | |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 604 | |
| Kirkville (Madison Co.) | NA | NA | NA | NA | NA | NA | 651 | |
| LeRoy (Genesee Co.) | 0 | 11 | NA | 0 | 0 | 0 | 624 | |
| Lyndonville (Orleans Co.) | 0 | 0 | NA | 1 | 0 | 0 | 599 | |
| Oswego (Oswego Co.) | 1 | 0 | NA | 0 | 0 | 0 | 513 | |
| Panama (Chautauqua Co.) | 0 | 0 | NA | 0 | 0 | 0 | 564 | |
| Penn Yan (Yates Co.)* | 0 | 0 | 0 | 0 | 0 | 0 | 619 | |
| Portville (Cattaraugus Co.) | NA | NA | NA | NA | NA | NA | 593 | |
| Preble (Cortland Co.) | 0 | 0 | NA | 0 | 0 | 0 | 463 | |
| Ransomville (Niagara Co.) | 0 | 0 | NA | 0 | 0 | 0 | 653 | |
| Seneca Castle (Ontario Co.)* | 28 | 6 | 10 | 0 | 0 | 0 | 612 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 601 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | NA | 547 | |
| Eastern NY trap Catch |
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| Accord (Ulster Co.) | NA | NA | NA | NA | NA | NA | 791 | |
| Amsterdam (Fulton Co.) | NA | NA | NA | NA | NA | NA | 620 | |
| Feura Bush (Albany Co.) | 0 | 0 | NA | NA | 0 | 0 | 742 | |
| Florida (Orange Co.) | 0 | 0 | NA | 5 | 0 | 0 | 794 | |
| Greenwich (Washington Co.) | 0 | 0 | NA | NA | 0 | 0 | 716 | |
| Hurley (Ulster Co.)* | 37 | 13 | 0 | 0 | 0 | 0 | 737 | |
| Kinderhook (Columbia Co.) | 0 | 0 | NA | NA | 0 | 0 | 753 | |
| Melrose (Rensselear Co.) | NA | NA | NA | NA | NA | NA | 735 | |
| Middleburgh (Schoharie Co.) | NA | NA | NA | NA | NA | NA | 753 | |
| Peru (Clinton Co.) | 0 | 0 | NA | 0 | 0 | 0 | 568 | |
| Plattsburgh (Clinton Co.) | 0 | 0 | NA | 0 | 0 | 0 | 603 | |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA | NA | 625 | |
| South Colton (St. Lawrence Co.) | NA | NA | NA | NA | NA | NA | 487 | |
| Stone Ridge (Ulster Co.) | 0 | 0 | NA | 8 | NA | NA | 718 | |
| Ticonderoga (Essex Co.) | 0 | 0 | NA | 0 | 0 | 0 | 601 | |
| Tivoli (Dutchess Co.) | NA | NA | NA | NA | NA | NA | 796 | |
| Unadilla (Delaware Co.) | NA | NA | NA | NA | NA | NA | 561 | |
| 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 6.9.20 – 6.16.20 |
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