Thirty-three sites reporting this week. Thirteen sites trapped European corn borer (ECB)-E and nine sites trapped ECB-Z. Corn earworm (CEW) was trapped at seventeen sites, with eleven sites high enough to be on a 4, 5, or 6 day spray schedule (see chart below). Fall armyworm (FAW) numbers are up this week with twenty sites reporting catches. Western Bean cutworm (WBC) numbers peaked two weeks ago and though numbers are down, twenty-eight sites still caught WBC this week.

Average sweet corn trap catches for all reporting sites from 5.23.17 – 8.22.17

FAW nubers 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.

Dry Bean Western Bean Cutworm Alert
8.22.17
Marion Zuefle, NYS IPM Program
(Alert modified from Carol McNeil)

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. Peak trap catch for each site is given in red in the table below. Geneva and Wayland were the only sites where trap catch numbers increased this week (for reporting sites), most other sites peaked 2-3 weeks ago.

Twelve 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.

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