Twenty-seven sites reported this week. European corn borer (ECB)- E was caught at seven sites and ECB-Z was caught at eight sites. The hybrid ECB was caught at only one of the seven sites trapping for it: Hurley (1). Twenty-one sites reported corn earworm (CEW) catches this week with nineteen sites high enough to be on a 4, 5, or 6 day spray schedule (see table at bottom of post). Fall armyworm (FAW) was caught at eight sites and Western bean cutworm (WBC) was caught at eighteen sites.
It is important to correctly identify the larval pests in your corn so that management practices can be altered when needed. Below are images of the four larval pests that the SCPTN monitors (ECB-E and Z look identical). To help with identification please also see the Sweet Corn Larval Pest Identification fact sheet (https://ecommons.cornell.edu/handle/1813/57328).
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- WBC larva in corn
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- CEW larva in corn
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- ECB larva in corn
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- Fall armyworm larva, note the inverted ‘Y’ om head capsule.
| Location | ECB-E | ECB-Z | CEW | FAW | WBC | DD | |
| Western NY trap Catch |
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| Baldwinsville (Onondaga Co.) | 0 | 0 | 4 | 0 | 0 | 2063 | |
| Batavia (Genesee Co.) | 1 | 0 | 2 | 0 | 2 | 2050 | |
| Bellona (Yates Co.) | 0 | 0 | 2 | 9 | 6 | 2082 | |
| Collins (Erie Co.) | NA | NA | NA | NA | NA | 1982 | |
| Eden (Erie Co.) | NA | NA | NA | NA | NA | 2027 | |
| Farmington (Erie Co.) | 2 | 0 | 0 | 0 | 3 | 2130 | |
| Geneva (Ontario Co.) | 0 | 9 | 24 | 3 | 1 | 1993 | |
| Hamlin (Orleans Co.) | 0 | 1 | 19 | 0 | 3 | 2026 | |
| King Ferry (Cayuga Co.) | 0 | 0 | 15 | 38 | 6 | 1993 | |
| Kirkville (Madison Co.) | 0 | 0 | 1 | 0 | 0 | 2111 | |
| LeRoy (Genesee Co.) | 1 | 4 | 21 | 0 | 37 | 2042 | |
| Lyndonville (Orleans Co.) | 1 | 1 | 1 | 0 | 22 | 2013 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 0 | 6 | 1925 | |
| Panama (Chautauqua Co.) | 0 | 0 | 3 | 0 | 0 | 1751 | |
| Penn Yan (Yates Co.) | 0 | 8 | 11 | 0 | 6 | 2029 | |
| Portville (Cattaraugus Co.) | 2 | 3 | 2 | 12 | 0 | 1787 | |
| Preble (Cortland Co.) | NA | NA | NA | NA | NA | 1768 | |
| Ransomville (Niagara Co.) | NA | NA | NA | NA | NA | 2135 | |
| Seneca Castle (Ontario Co.) | 0 | 1 | 0 | 0 | 0 | 2026 | |
| Sherwood (Cayuga Co.) | 0 | 0 | 10 | 228 | 1 | 2094 | |
| Williamson (Wayne Co.) | 0 | 0 | 19 | 0 | 7 | 1865 | |
| Eastern NY trap Catch |
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| Accord (Ulster Co.) | 0 | 0 | 69 | 0 | 1 | 2236 | |
| Afton (Chenango Co.) | 0 | 0 | 0 | 0 | 0 | 1844 | |
| Feura Bush (Albany Co.) | 0 | 0 | 11 | 0 | 0 | 2172 | |
| Florida (Orange Co.) | 0 | 0 | 17 | 0 | 3 | 2280 | |
| Greenwich (Washington Co.) | NA | NA | NA | NA | NA | 2128 | |
| Hurley (Ulster Co.) | 0 | 0 | 38 | 2 | 1 | 242 | |
| Kinderhook (Columbia Co.) | 0 | 0 | 35 | 7 | 0 | 2174 | |
| Melrose (Rensselear Co.) | NA | NA | NA | NA | NA | 2148 | |
| Peru (Clinton Co.) | 2 | 0 | 0 | 0 | 11 | 1995 | |
| Plattsburgh (Clinton Co.) | 2 | 1 | 3 | 6 | 18 | 2041 | |
| Plessis (Jefferson Co.) | 0 | 0 | 0 | 0 | 1 | 1986 | |
| South Colton (St. Lawrence Co.) | NA | NA | NA | NA | NA | 1721 | |
| Stone Ridge (Ulster Co.) | NA | NA | NA | NA | NA | 2236 | |
| Ticonderoga (Essex Co.) | NA | NA | NA | NA | NA | 2092 | |
| Tivoli (Dutchess Co.) | NA | NA | NA | NA | NA | 2235 | |
| Unadilla (Delaware Co.) | NA | NA | NA | NA | NA | 1841 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (base 86/50) April 1st accumulation Climate Smart Farming |
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| trap catches for the week of 8.16.22 – 8.23.22 |
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Interactive Sweet Corn Pheromone Trapping Network Map
Dry Bean Western Bean Cutworm Alert
8.23.22
This year we are monitoring 12 WBC traps placed next to dry bean fields. All dry bean growers should begin scouting pods for WBC feeding about 10 days after peak flight regardless of cumulative trap catch (number in red below), and should continue to scout for three weeks, especially if damage has been seen in recent years. Numbers are really beginning to decline and most traps will reach zero in the next two weeks.
Check 10 random spots in a field, 5 plants per spot. Inspect all the pods on the plants looking for holes. Surface feeding can be caused by other insects. WBC will mine directly into the pod and will often feed on the seed inside. European corn borer will also feed inside the pod and would most likely still be present. If there is damage going directly into the pod and seed but no larva present, it is quite possibly WBC. During the day WBC larva are not actively feeding in the pod, instead they drop to the soil and will remain there until night. Fresh damage will be green, not brown.
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- Early damage made by small WBC larvae.
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- ECB in pod.
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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.
This project is funded by the NYS Dry Bean Industry.
| Dry Bean Location | 7.5.22 | 7.12.22 | 7.19.22 | 7.26.22 | 8.2.22 | 8.9.22 | 8.16.22 | 8.23.22 | Cumulative WBC |
| Alexander (Genesee Co.) | 0 | 1 | 11 | 18 | 23 | 9 | 10 | 1 | 73 |
| Avoca Hill (Steuben Co.) | 0 | 1 | 10 | 31 | 53 | 23 | 6 | 0 | 124 |
| Avoca Valley (Steuben Co.) | 0 | 2 | 4 | 19 | 28 | 23 | 12 | 1 | 89 |
| Caledonia (Livingston Co.) | 1 | 3 | 8 | 25 | 36 | 36 | 14 | 22 | 145 |
| Churchville (Monroe Co.) | 0 | 3 | 30 | 36 | 31 | 24 | 11 | 5 | 140 |
| LeRoy (Genessee Co.) | 0 | 2 | 67 | 92 | 95 | 64 | 16 | 2 | 338 |
| Pavilion (Genesee Co.) | 0 | 1 | 5 | 4 | 3 | 5 | 3 | 1 | 22 |
| Penfield (Monroe Co.) | 3 | 2 | 26 | 94 | 120 | 85 | 32 | 34 | 396 |
| Penn Yan 1 (Yates Co.) | 1 | 2 | 6 | 19 | 29 | 20 | 9 | 9 | 85 |
| Penn Yan 2 (Yates Co.) | 0 | 0 | 12 | 7 | 31 | 11 | 13 | 16 | 90 |
| Wayland (Steuben Co.) | 1 | 1 | 4 | 34 | 90 | 47 | 16 | 1 | 194 |
| Wyoming (Wyoming Co.) | 0 | 3 | 24 | 13 | 13 | 1 | 1 | 2 | 57 |
| Western Bean Cutworm trap counts by date NA – not available |
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