Thirty-four of 38 sites reported this week. European corn borer (ECB)-E was caught at 13 sites and ECB-Z was caught at 6 sites. Corn earworm was caught at 22 sites with 18 sites high enough to be on a 4, 5, or 6 day spray schedule (see table below). Fall armyworm (FAW) was caught at 16 sites and Western bean cutworm (WBC) continues to increase, with 27 sites reporting catche. WBC flight will probably peak over the next week.
FAW numbers also increased this week. At sites where CEW are being caught in high enough numbers to determine the spray schedule, those applications will be sufficient to take care of other worm pests that are present. Where CEW are not determining the spray schedule, scout to be sure that FAW and other pests are not above threshold.
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- Fall armyworm egg mass.
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- Fall armyworm larva, note the inverted ‘Y’ om head capsule.
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- Feeding damage. Photo: Darcy Telenko
Percent WBC moth emergence, data from
University of Nebraska
| Location | ECB-E | ECB-Z | CEW | FAW | WBC | DD to Date |
|
| Accord (Ulster Co.) | 1 | 0 | 6 | NA | 0 | 1623.7 | |
| Amsterdam (Fulton Co.) | 8 | 0 | 0 | 0 | 45 | 1558.8 | |
| Athens (Greene Co.) | 4 | 0 | 8 | 1 | 5 | 1763.1 | |
| Avon (Livingston Co.) | 0 | 0 | 3 | 1 | 32 | 1554.2 | |
| Baldwinsville (Onondaga Co.) | 1 | 1 | 6 | 4 | 39 | 1624.6 | |
| Batavia (Genesee Co.) | 0 | 12 | 2 | 0 | 20 | 1620.9 | |
| Bellona (Yates Co.) | 3 | 0 | 1 | 2 | 58 | 1669.3 | |
| Eagle Bridge (Washington Co.) | 0 | 0 | 7 | 0 | 6 | 1408.5 | |
| Eden (Erie Co.) | 2 | 0 | 1 | 0 | 36 | 1568.3 | |
| Farmington (Ontario Co.) | 0 | 0 | 0 | 0 | 0 | 1540.5 | |
| Feura Bush (Albany Co.) | 0 | 0 | 21 | 0 | 9 | 1569.9 | |
| Florida (Orange Co.) | NA | NA | NA | NA | NA | 1705.0 | |
| Geneva (Ontario Co.) | 2 | 0 | 5 | 4 | 7 | NA | |
| Greenwich (Washington Co.) | 0 | 0 | 0 | 0 | 22 | 1408.5 | |
| Hamlin (Monroe Co.) | NA | NA | NA | NA | NA | 1509.2 | |
| Hurley (Ulster Co.) | 18 | 12 | 2 | 1 | 0 | 1693.1 | |
| Kennedy (Chautauqua Co.) | 0 | 0 | 0 | 1 | 14 | 1415.5 | |
| Kinderhook (Columbia Co.) | 5 | 0 | 44 | 3 | 10 | 1689.0 | |
| King Ferry (Cayuga Co.) | 0 | 0 | 14 | 2 | 8 | 1614.3 | |
| Kirkville (Madison Co.) | 6 | 1 | 4 | 0 | 1 | 1597.5 | |
| New Paltz (Ulster Co.) | 0 | 1 | 5 | NA | 0 | 1626.3 | |
| Oswego (Oswego Co.) | 0 | 0 | 0 | 2 | 75 | 1540.8 | |
| Owego (Tioga Co.) | 0 | 0 | 0 | 0 | 0 | 1395.5 | |
| Pavilion (Genesee Co.) | 0 | NA | 15 | 35 | 39 | 1296.0 | |
| Penn Yan (Yates Co.) | 0 | 0 | 1 | 9 | 23 | 1649.0 | |
| Peru (Clinton Co.) | 0 | 0 | 1 | 0 | 149 | 1454.9 | |
| Plattsburgh (Clinton Co.) | 0 | 0 | 0 | 0 | 271 | 1451.6 | |
| Plessis (Jefferson Co.) | 0 | 0 | 0 | 0 | 55 | 1498.5 | |
| Preble (Cortland Co.) | 0 | 6 | 0 | 0 | 22 | 1550.4 | |
| Ransomville (Niagara Co.) | 0 | 0 | 2 | 1 | 18 | 1663.4 | |
| Schaghticoke (Rensselear Co.) | NA | NA | NA | NA | NA | 1717.5 | |
| Seneca Castle (Ontario Co.) | 0 | 0 | 0 | 1 | 5 | 1558.8 | |
| Sharon Springs (Schoharie Co.) | NA | NA | NA | NA | NA | 1580.0 | |
| Sherwood (Cayuga Co.) | 0 | 0 | 2 | 3 | 4 | 1614.3 | |
| South Colton (St. Lawrence Co.) | 3 | 0 | 2 | 0 | 70 | 1247.0 | |
| Stone Ridge (Ulster Co.) | 1 | 0 | 2 | NA | NA | 1693.1 | |
| Tivoli (Dutchess Co.) | 1 | 0 | 0 | NA | NA | 1723.3 | |
| Williamson (Wayne Co.) | 0 | 0 | 0 | 1 | 3 | 1455.5 | |
| ECB – European Corn Borer CEW – Corn Earworm FAW – Fall Armyworm WBC – Western Bean Cutworm NA – not available DD – Degree Day (base 50F) accumulation since May 1st according to nearest NEWA station |
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| trap catches for the week of 7.24.18 – 7.31.18 |
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Dry Bean Western Bean Cutworm Alert
7.31.18
Marion Zuefle, NYS IPM Program
(Alert modified from Carol McNeil)
(Information and photos from T. Baute, OMAFRA)
This year we are monitoring ten 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 100 moths. Six sites have now reached this threshold (see table below). Trap catch numbers will be updates as they are reported. 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.
Check 10 random spots in a field, 5 plants per spot. Inspect all the pods on the plants looking for holes. Fresh damage will be green, not brown. 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 2018
| Dry Bean Location | 7.3.18 | 7.10.18 | 7.17.18 | 7.24.18 | 7.31.18 | Cumulative WBC | |
| Attica (Wyoming Co.) | 2 | 4 | 32 | 105 | 154 | 297 | |
| Avoca 1 (Steuben Co.) | NA | 0 | 2 | 37 | NA | 39 | |
| Avoca 2(Steuben Co.) | NA | 2 | 30 | 101 | NA | 133 | |
| Caledonia South (Livingston Co.) | 0 | 0 | 6 | 30 | 59 | 95 | |
| Chili (Monroe Co.) | 0 | 1 | 8 | 54 | 81 | 144 | |
| Geneva (Ontario Co.) | 0 | 0 | 4 | 24 | 41 | 69 | |
| Groveland (Livingston Co.) | 0 | 0 | 5 | 76 | 110 | 191 | |
| Riga (Monroe Co.) | 0 | 5 | 54 | 146 | 71 | 276 | |
| Stafford (Genesee Co.) | 1 | 0 | 8 | 83 | 80 | 172 | |
| Wayland (Steuben Co.) | NA | 2 | 3 | 11 | NA | 16 | |
| Western Bean Cutworm trap counts by date NA – not available |
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