Twenty-four sites reporting this week. Only one site caught European corn borer (ECB)-E and two sites caught ECB-Z. Corn earworm (CEW) was trapped at eleven sites, with seven sites high enough to be on a 4, 5, or 6 day spray schedule (see chart below). Fall armyworm (FAW) numbers continue to increase this week with eighteen sites reporting catches. Western Bean cutworm (WBC) was reported from fourteen sites this week.
Where CEW are being caught in high enough numbers to drive the spray schedule, the other worm pests should also be controlled. Where FAW are being caught, a tassel emergence scout is still a good idea, as some years we see heavy FAW infestations in the emerging tassels in late plantings that may have time to get into developing ears before silk sprays for CEW. At locations where CEW numbers are still low, scout tassel emergence and silk stage fields for ECB and FAW larvae. Use a threshold of 15% infested plants in tassel emergence stage fields and 5% in silk stage fields.
Average sweet corn trap catches for all reporting sites from 5.23.17 – 8.29.17
| Location | ECB-E | ECB-Z | CEW | FAW | WBC | ||
| Accord (Ulster Co.) | NA | NA | NA | NA | NA | ||
| Amsterdam (Fulton Co.) | 0 | 0 | 0 | 1 | 0 | ||
| Athens (Greene Co.) | 0 | 1 | 1 | 18 | 0 | ||
| Avoca (Steuben Co.) | NA | NA | NA | NA | NA | ||
| Baldwinsville (Onondaga Co.) | 1 | 0 | 1 | 7 | 0 | ||
| Batavia (Genesee Co.) | 0 | 0 | 10 | 0 | 2 | ||
| Bellona (Yates Co.) | 0 | 0 | 0 | 81 | 0 | ||
| Clifton Park (Saratoga Co.) | 0 | 0 | 4 | 9 | 0 | ||
| Eagle Bridge (Washington Co.) | NA | NA | NA | NA | NA | ||
| Eden (Erie Co.) | 0 | 0 | 0 | 3 | 1 | ||
| Farmersville Sta. (Cattaraugus Co.) | NA | NA | NA | NA | NA | ||
| Farmington (Ontario Co.) | 0 | 0 | 0 | 2 | 0 | ||
| Feura Bush (Albany Co.) | NA | NA | NA | NA | NA | ||
| Florida (Orange Co.) | 0 | 0 | 6 | 31 | 4 | ||
| Greenwich (Washington Co.) | 0 | 0 | 0 | 1 | 5 | ||
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | ||
| Hurley (Ulster Co.) | 0 | 1 | 15 | NA | NA | ||
| Kennedy (Chautauqua Co.) | 0 | 0 | 0 | 23 | 0 | ||
| Kinderhook (Columbia Co.) | NA | NA | NA | NA | NA | ||
| King Ferry (Cayuga Co.) | 0 | 0 | 1 | 77 | 3 | ||
| Kirkville (Madison Co.) | NA | NA | NA | NA | NA | ||
| LeRoy (Genesee Co.) | NA | NA | NA | NA | NA | ||
| Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | 12 | ||
| Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | ||
| Pavilion (Genesee Co.) | 0 | 0 | 5 | 48 | 5 | ||
| Penn Yan (Yates Co.) | 0 | 0 | 2 | 37 | 1 | ||
| Peru (Clinton Co.) | 0 | 0 | 0 | 0 | 16 | ||
| Plattsburgh (Clinton Co.) | 0 | 0 | 0 | 1 | 18 | ||
| Plessis (Jefferson Co.) | 0 | 0 | 1 | 0 | 9 | ||
| Preble (Cortland Co.) | NA | NA | NA | NA | NA | ||
| Ransomville (Niagara Co.) | 0 | 0 | 2 | 7 | 4 | ||
| Schoharie (Schoharie Co.) | 0 | 0 | 0 | 5 | 6 | ||
| Seneca Castle (Ontario Co.) | 0 | 0 | 0 | 10 | 1 | ||
| Sherwood (Cayuga Co.) | 0 | 0 | 0 | 3 | 0 | ||
| Stone Ridge (Ulster Co.) | NA | NA | NA | NA | NA | ||
| Tivoli (Dutchess Co.) | NA | NA | NA | NA | NA | ||
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | ||
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available |
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| trap catches for the week of 8.22.17 – 8.29.17 |
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Dry Bean Western Bean Cutworm Alert
8.29.17
Marion Zuefle, NYS IPM Program
(Alert modified from Carol McNeil)
All dry bean growers should be scouting pods for WBC feeding damage about 10 days after peak flight regardless of cumulative trap catch, and should continue to scout for three weeks, especially if damage has been seen in recent years. Peak trap catch for each site is given in red in the table below. Trap counts at the seven reporting sites were all down this week. Trap catch numbers for the remaining sites will be updated as they come in.
Five sites were scouted this week and no WBC damage was observed in any of the sites. To scout dry bean fields check 10 random spots in a field. Inspect all the pods on the plants looking for holes. Below are some photos of WBC damage in dry beans from Chris DiFonzo of the University of Michigan.
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- Early damage made by small WBC larvae.
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- Damage caused by slug feeding, note slime trail.
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- Later feeding damage going through pod and into beans.
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- Later feeding damage on beans.
If you have questions contact Marion Zuefle at mez4@cornell.edu or 315-787-2379.
This project is funded by the NYS Dry Bean Industry.
Location of WBC traps near Dry Beans 2017
| Dry Bean Location | 7.25.17 | 8.1.17 | 8.8.17 | 8.15.17 | 8.22.17 | 8.29.17 | Cumulative WBC |
| Attica 1 (Wyoming Co.) | 54 | 61 | 56 | 30 | 9 | 2 | 238 |
| Attica 2 (Wyoming Co.) | 4 | 12 | 3 | 1 | 2 | 0 | 35 |
| Avoca (Steuben Co.) | 7 | 16 | 8 | 5 | 7 | 0 | 48 |
| Caledonia North (Livingston Co.) | 4 | 24 | 18 | 89 | 10 | 2 | 146 |
| Caledonia South (Livingston Co.) | 2 | 14 | 11 | 8 | 1 | 0 | 37 |
| Covington (Wyoming Co) | 9 | 6 | 103 | 78 | 47 | 17 | 267 |
| Geneva (Ontario Co.) | 7 | 4 | 7 | 9 | 24 | 0 | 52 |
| Groveland (Livingston Co.) | 1 | 7 | 4 | 4 | 4 | 2 | 22 |
| Kanona (Steuben Co.) | 0 | 0 | 4 | 6 | 0 | 0 | 10 |
| Pavilion (Wyoming Co.) | 39 | 28 | 18 | 13 | 4 | 0 | 111 |
| Riga (Monroe Co.) | 77 | 107 | 61 | 23 | 7 | 0 | 310 |
| Stafford (Genesee Co.) | 42 | 29 | 8 | 11 | 2 | 1 | 109 |
| Wayland (Steuben Co.) | 1 | 6 | 20 | 2 | 50 | 3 | 83 |
| Western Bean Cutworm trap counts by date NA – not available |
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