September 26, 2023

NY Sweet Corn Trap Network Report 9.26.23

This will be the last post of the season. I would like to thank all of the cooperators for helping to collect data this year. Please contact me with any questions or suggestions for improvements (mez4@cornell.edu).

Fifteen sites reporting this last week. No European corn borer (ECB)- E were caught at any of the reporting sites this week and ECB-Z was caught at only one site. Corn earworm (CEW) was caught at 14 sites, with 11 high enough to be on a 4, 5 or 6 day spray schedule (see table below). Fall armyworm (FAW) was caught at one sites this week and only one site caught Western bean cutworm (WBC).

Below are graphs of the moth flights for 2023 and 2022 for comparison. ECB-E and ECB-Z trap catch numbers were low all year and very similar to 2022.  CEW numbers started later this year as compared to 2022 but the peak flight was much higher with an average of 67 moths per week as compared to 47 in 2022. We had very low FAW trap catches at all sites this year as compared to previous years.However FAW damage was reported from several locations causing me to think it might be related to the pheromone lures. Some of the lures are being tested for efficacy. The flights for WBC were nearly double the 2022 flight. The peak continues to occur between teh last week of July and the first week of August in both years.

Average sweet corn trap catches from 5.30.23– 9.26.23.

Average sweet corn trap catches from 5.30.23– 9.26.23.

 

Average sweet corn trap catches from 5.31.22– 9.27.22

Average sweet corn trap catches from 5.31.22– 9.27.22

The SCPTN started in 1993 and monitored for ECB-E and ECB-Z. In 1997 CEW and FAW were added and in 2010 WBC was added to the trapping effort. Below are graphs showing the populations trends in NY over those years. Keep in mind that trapping locations do change from year to year as new cooperators start while others are unable to continue. The graphs represent general trends for the state. From teh graphs below you can see that this was, on average, the highest WBC trapping year to date as well as one of the lowest FAW years since trapping began.

Average trap catches 1993-2023 for ECB-E and ECB-Z

Average trap catches 1993-2023 for ECB-E and ECB-Z

 

Average sweet corn pheromone trap catches 1993-2023 for CEW, FAW and WBC.

Average sweet corn pheromone trap catches 1993-2023 for CEW, FAW and WBC.

 

Table showing trap catch for 9.19.23 - 9.26.23.

Table showing trap catch for 9.19.23 – 9.26.23.

 

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