Ten sites reporting this week with European corn borer (ECB)-E caught at 4 sites and ECB-Z caught at 5 sites. Numbers remain low for both races. Peak ECB-E flight occurs at approximately 631 degree days modified base 50. This will most likely occur at several sites within the next week (see degree days for each site in table below). Accumulated degree days for the 25 trap network sites range from 395 to 602 with an average of 516 modified base 50F. Three sites are reporting corn earworm (CEW) with two sites, Eden and Spencerport, with trap catches high enough to be on a 5 and 6 day spray interval respectively. Western bean cutworm (WBC) traps have been deployed at several locations but no moths have been caught to date.
J.W. Apple, Department of Entomology, University of Wisconsin-Madison
| Location | ECB-E | ECB-Z | CEW | FAW | WBC | DD to Date |
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| Avoca (Steuben Co.) | NA | NA | NA | NA | NA | 472.5 | |
| Avon (Livingston Co.) | NA | NA | NA | NA | NA | 586.8 | |
| Baldwinsville (Onondaga Co.) | NA | NA | NA | NA | NA | 548.5 | |
| Batavia (Genesee Co.) | 0 | 0 | 0 | 0 | 0 | 395.7 | |
| Belfast (Allegany Co.) | 0 | 0 | 0 | 0 | 0 | 502.4 | |
| Bellona (Yates Co.) | NA | NA | NA | NA | NA | 602.5 | |
| Eden (Erie Co.) | 0 | 1 | 7 | 0 | 0 | 497.2 | |
| Farmington (Ontario Co.) | 4 | 0 | 0 | 0 | NA | 517.0 | |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | 503.5 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | 446.5 | |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | 567.4 | |
| Kirkville (Madison Co.) | NA | NA | NA | NA | NA | 586.4 | |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | 466.8 | |
| Lockport (Niagara Co.) | 1 | 1 | 0 | 0 | 0 | 479.5 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | NA | 509.1 | |
| Owego (Tioga Co.) | 6 | 0 | 0 | 0 | 0 | 497.6 | |
| Pavilion (Genesee Co.) | NA | NA | NA | NA | NA | 466.8 | |
| Penn Yan (Yates Co.) | 0 | 3 | 1 | 0 | NA | 573.5 | |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA | 488.5 | |
| Preble (Cortland Co.) | NA | NA | NA | NA | NA | 542.0 | |
| Seneca Castle (Ontario Co.) | 1 | 2 | 0 | 0 | NA | 524.2 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | 567.4 | |
| Spencerport (Monroe Co.) | 0 | 3 | 2 | 0 | NA | 586.8 | |
| Waterport (Orleans Co.) | NA | NA | NA | NA | NA | 503.5 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | 465.9 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (modified base 50F) accumulation |
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| trap catches for the week of 6.2.15 – 6.9.15 |
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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. To help you scout your fields please view the video titled How to Scout Fresh Market Sweet Corn.
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- ECB frass in emerging tassel.
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- ECB larva on tassel
