Thirty-one sites reported this week. Two of the sites had European corn borer (ECB)-E and one site had ECB-Z. Twenty-six sites reported corn earworm (CEW) with twenty-five high enough to be on a 3, 4, 5 or 6 day spray interval (see table at bottom of post). Fall armyworm (FAW) was caught at twenty-two sites and Western bean cutworm (WBC) was caught at fourteen sites. The hybrid ECB moth was not caught at any of the six reporting sites. The graph below shows the average trap catch to date. Both FAW and CEW increased over the last week while WBC and ECB remain low.
Average sweet corn trap catches for all reporting sites from 5.26.20 – 9.1.20.
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 review the Sweet Corn Larval Pest Identification fact sheet (https://ecommons.cornell.edu/handle/1813/57328), or the Spanish version Identificación de Plagas de Larvas de Maíz Dulce (https://ecommons.cornell.edu/handle/1813/60519).
- WBC larva in corn
- CEW larva in corn
- ECB larva in corn
- Fall armyworm larva, note the inverted ‘Y’ om head capsule.
| Location | ECB-E | ECB-Z | Hybrid | CEW | FAW | WBC | DD | |
| Western NY trap Catch |
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| Attica (Wyoming Co.) | 0 | 0 | NA | 20 | 0 | 1 | 2147 | |
| Baldwinsville (Onondaga Co.) | 0 | 0 | NA | 27 | 0 | 2 | 2219 | |
| Batavia (Genesee Co.) | 0 | 0 | NA | 9 | 3 | 0 | 2209 | |
| Bellona (Yates Co.)* | 0 | 0 | 0 | 13 | 14 | 0 | 2260 | |
| Brockport (Monroe Co.) | 0 | 0 | NA | 5 | 1 | 1 | 2210 | |
| Eden (Erie Co.) | 0 | 0 | NA | 24 | 114 | 2 | 2222 | |
| Farmington (Ontario Co)* | 0 | 0 | 0 | 19 | 3 | 0 | 2321 | |
| Geneva (Ontario Co.)* | 0 | 0 | 0 | 119 | 0 | 0 | 2263 | |
| Hamlin (Orleans Co.) | 0 | 0 | NA | 12 | 5 | 8 | 2233 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | NA | 2083 | |
| King Ferry (Cayuga Co.) | 0 | 0 | NA | 30 | 134 | 0 | 2163 | |
| Kirkville (Madison Co.) | 0 | 0 | NA | 0 | 1 | 0 | 2231 | |
| LeRoy (Genesee Co.) | 0 | 0 | NA | 74 | 21 | 0 | 2206 | |
| Lyndonville (Orleans Co.) | 0 | 0 | NA | 38 | 13 | 3 | 2172 | |
| Oswego (Oswego Co.) | 0 | 0 | NA | 10 | 0 | 4 | 2082 | |
| Panama (Chautauqua Co.) | 0 | 0 | NA | 10 | 3 | 0 | 1939 | |
| Penn Yan (Yates Co.)* | 0 | 4 | 0 | 16 | 6 | 0 | 2187 | |
| Portville (Cattaraugus Co.) | NA | NA | NA | NA | NA | NA | 1932 | |
| Preble (Cortland Co.) | NA | NA | NA | NA | NA | NA | 1908 | |
| Ransomville (Niagara Co.) | 0 | 0 | NA | 14 | 27 | 2 | 2286 | |
| Seneca Castle (Ontario Co.)* | 0 | 0 | 0 | 2 | 5 | 0 | 2217 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 2195 | |
| Williamson (Wayne Co.) | NA | NA | NA | NA | NA | NA | 2102 | |
| Eastern NY trap Catch |
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| Amsterdam (Fulton Co.) | NA | NA | NA | NA | NA | NA | 2140 | |
| Feura Bush (Albany Co.) | 0 | 0 | NA | 12 | 0 | 0 | 2347 | |
| Florida (Orange Co.) | 0 | 0 | NA | 2 | 113 | 2 | 2459 | |
| Greenwich (Washington Co.) | NA | NA | NA | NA | NA | NA | 2292 | |
| Hurley (Ulster Co.)* | 2 | 0 | 0 | 57 | 3 | 4 | 2361 | |
| Kinderhook (Columbia Co.) | 0 | 0 | NA | 34 | 50 | 0 | 2361 | |
| Melrose (Rensselear Co.) | 0 | 0 | NA | 16 | 1 | 0 | 2314 | |
| Middleburgh (Schoharie Co.) | NA | NA | NA | NA | NA | NA | 2351 | |
| New Paltz (Ulster Co.) | 0 | 0 | NA | NA | NA | NA | 2481 | |
| Peru (Clinton Co.) | 1 | 0 | NA | 0 | 8 | 2 | 2163 | |
| Plattsburgh (Clinton Co.) | 0 | 0 | NA | 1 | 6 | 4 | 2199 | |
| Plessis (Jefferson Co.) | 0 | 0 | NA | 0 | 0 | 2 | 2288 | |
| South Colton (St. Lawrence Co.) | NA | NA | NA | NA | NA | NA | 1953 | |
| Stone Ridge (Ulster Co.) | 0 | 0 | NA | 15 | NA | NA | 2330 | |
| Ticonderoga (Essex Co.) | 0 | 0 | NA | 0 | 1 | 0 | 2238 | |
| Tivoli (Dutchess Co.) | 0 | 0 | NA | 27 | NA | NA | 2447 | |
| Unadilla (Delaware Co.) | 0 | 0 | NA | 12 | 12 | 1 | 2005 | |
| 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 8.25.20 – 9.1.20 |
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Dry Bean Western Bean Cutworm Alert
9.1.20
Marion Zuefle, NYS IPM Program and Margie Lund, CVP
(Information and photos from T. Baute, OMAFRA)
Four of the eight sites we are monitoring this year had a trap catch of zero this week. We will monitor traps for one more week and then remove them for the season. All eight of the sites reached the 50 moth cumulative trap catch this season. At that time scouting should begin, first in nearby corn and then in dry beans 7-10 days after peak flight.
| Dry Bean Location | 7.28.20 | 8.4.20 | 8.11.20 | 8.18.20 | 8.25.20 | 9.1.20 | Cumulative WBC |
| Avoca Hill (Steuben Co.) | 67 | 80 | 21 | 3 | 2 | 2 | 198 |
| Avoca Valley (Steuben Co.) | 44 | 94 | 43 | 8 | 0 | 0 | 196 |
| Caledonia South (Livingston Co.) | 54 | 58 | 32 | 22 | 2 | 0 | 174 |
| Caledonia Southwest (Livingston Co.) | 100 | 101 | 48 | 21 | 4 | 3 | 285 |
| Geneva (Ontario Co.) | 38 | 42 | 52 | 11 | 1 | 1 | 160 |
| Riga (Monroe Co.) | 49 | 28 | 17 | 10 | 3 | 1 | 131 |
| Stafford (Genesee Co.) | 41 | 34 | 5 | 1 | 1 | 0 | 102 |
| Wayland (Steuben Co.) | 24 | 92 | 38 | 16 | 0 | 0 | 176 |
| Western Bean Cutworm trap counts by date. | |||||||
Pod feeding typically begins 10 days after peak moth catch. Early feeding by small larvae is generally minor and does not go into the pod. Growers in areas of concern should scout bean pin pods and larger pods for damage/feeding holes. Check 10 spots in a field, 5 plants per spot. WBC larvae hide in the soil during the day and won’t be seen on beans.
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- Later feeding damage going through pod and into beans.
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- Dry bean with pod damage.
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- Dry bean pods with WBC feeding damage.
This project is funded by the NYS Dry Bean Industry.