Thirty-two sites reported this week. Nine of the sites had European corn borer (ECB)-E and four sites had ECB-Z. Sixteen sites reported corn earworm (CEW) with fourteen high enough to be on a 4, 5 or 6 day spray interval (see table at bottom of post). Fall armyworm (FAW) moths were caught at eight sites and Western bean cutworm (WBC) was caught at twenty-four sites. The hybrid ECB moth was not caught at any of the five reporting sites
Western bean cutworm numbers really increased this week and will most likely peak over the next 2 weeks. Be sure to scout your pretassel corn for egg masses. And to determine estimated WBC flight completion refer to the lookup table using the base 38F column.
NEWA Western bean cutworm flight emergence lookup table.
| Location | ECB-E | ECB-Z | Hybrid | CEW | FAW | WBC | DD | |
| Western NY trap Catch |
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| Attica (Wyoming Co.) | 0 | 0 | NA | 0 | 0 | 1 | 2382 | |
| Baldwinsville (Onondaga Co.) | 3 | 0 | NA | 7 | 0 | 21 | 2473 | |
| Batavia (Genesee Co.) | 0 | 0 | NA | 0 | 0 | 43 | 2438 | |
| Bellona (Yates Co.)* | 0 | 0 | 0 | 3 | 4 | 7 | 2448 | |
| Brockport (Monroe Co.) | NA | NA | NA | NA | NA | NA | 2526 | |
| Eden (Erie Co.) | 0 | 0 | NA | 6 | 8 | 1 | 2443 | |
| Farmington (Ontario Co)* | 0 | 0 | 0 | 0 | 0 | 1 | 2515 | |
| Geneva (Ontario Co.)* | 2 | 0 | 0 | 0 | 0 | 1 | 2455 | |
| Hamlin (Orleans Co.) | 1 | 0 | NA | 2 | 0 | 0 | 2426 | |
| Kennedy (Chautauqua Co.) | NA | NA | NA | NA | NA | NA | 2309 | |
| King Ferry (Cayuga Co.) | 0 | 0 | NA | 0 | 10 | 0 | 2329 | |
| Kirkville (Madison Co.) | 0 | 0 | NA | 0 | 1 | 15 | 2427 | |
| LeRoy (Genesee Co.) | 6 | 5 | NA | 7 | 2 | 0 | 2418 | |
| Lyndonville (Orleans Co.) | 0 | 0 | NA | 3 | 0 | 8 | 2362 | |
| Oswego (Oswego Co.) | 0 | 0 | NA | 0 | 0 | 8 | 2213 | |
| Panama (Chautauqua Co.) | 1 | 1 | NA | 1 | 0 | 2 | 2159 | |
| Penn Yan (Yates Co.)* | NA | NA | NA | NA | NA | NA | 2366 | |
| Portville (Cattaraugus Co.) | 0 | 0 | NA | 0 | 0 | 6 | 2135 | |
| Preble (Cortland Co.) | 0 | 0 | NA | 0 | 0 | 10 | 2045 | |
| Ransomville (Niagara Co.) | 0 | 0 | NA | 1 | 0 | 0 | 2456 | |
| Seneca Castle (Ontario Co.)* | 11 | 3 | 0 | 5 | 4 | 5 | 2399 | |
| Sherwood (Cayuga Co.) | NA | NA | NA | NA | NA | NA | 2363 | |
| Williamson (Wayne Co.) | 0 | 0 | NA | 0 | 0 | 0 | 2256 | |
| Eastern NY trap Catch |
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| Amsterdam (Fulton Co.) | NA | NA | NA | NA | NA | NA | 2290 | |
| Feura Bush (Albany Co.) | 0 | 0 | NA | 0 | 0 | 0 | 2542 | |
| Florida (Orange Co.) | 0 | 0 | NA | 11 | 12 | 4 | 2641 | |
| Greenwich (Washington Co.) | 0 | 0 | NA | 2 | 0 | 3 | 2473 | |
| Hurley (Ulster Co.)* | 21 | 0 | 0 | 11 | 0 | 6 | 2541 | |
| Kinderhook (Columbia Co.) | 0 | 0 | NA | 3 | 0 | 2 | 2567 | |
| Melrose (Rensselear Co.) | 0 | 0 | NA | 6 | 0 | 3 | 2500 | |
| Middleburgh (Schoharie Co.) | NA | NA | NA | NA | NA | NA | 2544 | |
| New Paltz (Ulster Co.) | 0 | 0 | NA | NA | NA | 0 | 2701 | |
| Peru (Clinton Co.) | 0 | 0 | NA | 0 | 0 | 25 | 2319 | |
| Plattsburgh (Clinton Co.) | 1 | 0 | NA | 0 | 0 | 39 | 232 | |
| Plessis (Jefferson Co.) | 0 | 1 | NA | 0 | 1 | 8 | 2437 | |
| South Colton (St. Lawrence Co.) | NA | NA | NA | NA | NA | NA | 2111 | |
| Stone Ridge (Ulster Co.) | NA | NA | NA | NA | NA | NA | 2472 | |
| Ticonderoga (Essex Co.) | 0 | 0 | NA | 0 | 0 | 16 | 2352 | |
| Tivoli (Dutchess Co.) | 3 | 0 | NA | 4 | NA | NA | 2669 | |
| Unadilla (Delaware Co.) | 0 | 0 | NA | 4 | 0 | 1 | 2056 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (base 38) March 1st accumulation Climate Smart Farming |
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| trap catches for the week of 7.14.20 – 7.21.20 |
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Dry Bean Western Bean Cutworm Alert
7.21.20
Marion Zuefle, NYS IPM Program and Margie Lund, CVP
(Information and photos from T. Baute, OMAFRA)
This year we are monitoring eight WBC traps placed next to dry bean fields. The location of the traps are given in the image below. Dry bean growers should scout adjacent corn for WBC eggs and larvae when cumulative trap catch reaches 50 moths. As of today, none of the sites have reached a cumulative trap catch of 50 WBC moths (see table below for cumulative trap catch). Peak WBC flight historically occurs the last week of July into early August. All dry bean growers should begin scouting pods for WBC feeding 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.
Location of WBC traps near Dry Beans in 2020.
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 (see image below). Slugs will also feed on the pods causing similar damage, but will often leave a slime trail (image below). 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.
| Dry Bean Location | 7.7.20 | 7.14.20 | 7.21.20 | Cumulative WBC | |||
| Avoca Hill (Steuben Co.) | 0 | 0 | 23 | 23 | |||
| Avoca Valley (Steuben Co.) | 1 | 0 | 6 | 7 | |||
| Caledonia South (Livingston Co.) | 0 | 0 | 6 | 6 | |||
| Caledonia Southwest (Livingston Co.) | 0 | 0 | 8 | 8 | |||
| Geneva (Ontario Co.) | 0 | 2 | 13 | 15 | |||
| Riga (Monroe Co.) | 0 | 1 | 24 | 25 | |||
| Stafford (Genesee Co.) | 1 | 1 | 18 | 20 | |||
| Wayland (Steuben Co.) | 0 | 2 | 4 | 6 | |||
| Western Bean Cutworm trap counts by date | |||||||
This project is funded by the NYS Dry Bean Industry.