Seventeen sites reporting this week. European corn borer (ECB)-E was caught at two sites and ECB-Z at three sites. Two sites caught corn earworm (CEW) with the Eden site high enough to require a 6 day spray schedule (see table at bottom of post). Fall armyworm (FAW) was caught at only one site this week and Western bean cutworm (WBC) was caught at two sites this week.
Fields are in both the tassel emergence and silking stage. The thresholds when scouting differ for these two stages of corn. For tassel emergence corn the threshold is 15% infested plants. For silking corn the threshold drops to 5% infested plants. To help you scout your fields please view the 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).
We are averaging 740 degree days for the trapping sites. This is about 100 degree days cooler as compared to last year at this time. The first flight of ECB is tapering off and we are entering the treatment period according to the table below from University of Wisconsin. The second generation of ECB-E will begin to emerge at about 1400 modified base 50 degree days.
J.W. Apple, Department of Entomology, University of Wisconsin-Madison
| Western NY Locations | ECB-E | ECB-Z | CEW | FAW | WBC | DD to date |
|
| Avoca (Steuben Co.) | 0 | 0 | 0 | 0 | 0 | 668.0 | |
| Avon (Livingston Co.) | 0 | 0 | 0 | 0 | 0 | 829.7 | |
| Baldwinsville (Onondaga Co.) | 0 | 0 | 0 | 0 | 0 | 784.5 | |
| Batavia (Genesee Co.) | 0 | 1 | 1 | 0 | 0 | 553.6 | |
| Belfast (Allegany Co.) | NA | NA | NA | NA | NA | 702.1 | |
| Bellona (Yates Co.) | NA | NA | NA | NA | NA | 866.0 | |
| Eden (Erie Co.) | 1 | 0 | 2 | 0 | 0 | 762.6 | |
| Farmington (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 724.2 | |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | 712.1 | |
| Kennedy (Chautauqua Co.) | 0 | 0 | 0 | 0 | 0 | 699.0 | |
| King Ferry (Cayuga Co.) | NA | NA | NA | NA | NA | 757.4 | |
| Kirkville (Madison Co.) | 1 | 2 | 0 | 0 | 0 | 789.8 | |
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | 698.1 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 1 | 0 | 836.7 | |
| Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | 687.5 | |
| Pavilion (Genesee Co.) | 0 | 0 | 0 | 0 | 1 | 567.2 | |
| Penn Yan (Yates Co.) | 0 | 0 | 0 | 0 | 0 | 818.2 | |
| Plessis (Jefferson Co.) | NA | NA | NA | NA | NA | 706.8 | |
| Preble (Cortland Co.) | 0 | 0 | 0 | 0 | 0 | 747.0 | |
| Ransomville (Niagara Co.) | 0 | 0 | 0 | 0 | 0 | 812.5 | |
| Seneca Castle (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 766.2 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | 757.4 | |
| Spencerport (Monroe Co.) | 0 | 4 | 0 | 0 | 0 | 829.7 | |
| Waterport (Orleans Co.) | NA | NA | NA | NA | NA | 736.5 | |
| Williamson (Wayne Co.) | 0 | 0 | 0 | 0 | 1 | 674.4 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm DD – Degree Day (base 50F) accumulation NA – not available |
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| trap catches for the week of 6.21.16 – 6.28.16 |
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