Corn earworm eggs and larvae on leaf
Article is taken from https://agcrops.osu.edu/newsletter/corn-newsletter/2024-24/lep-monitoring-network-%E2%80%93-time-scout-western-bean-cutworm-update by Stephanie Pflaum, Amy Raudenbush, Maddie Brillhart, Trevor Corboy, Allen Gahler, Don Hammersmith, Mary Jo Hassen, Ed Lentz, CCA, Kendall Lovejoy, Sarah Noggle, Les Ober, CCA, Jordan Penrose, Beth Scheckelhoff, Mike Sunderman, Frank Thayer, Kyle Verhoff, Jacob Winters, Kayla Wyse, Curtis Young, CCA, Andy Michel, Kelley Tilmon
We have just finished out our fourteenth week of monitoring at the Lep Network. This past week, we saw WBC numbers trending down and CEW numbers close to zero across the state. Western bean cutworm numbers topped out with Sandusky County having the highest average by far of 38 moths. As for corn earworm, Putnam was the only county to report any CEW sightings for this past week and averaged 0.3 moths in the county. Western bean cutworm populations across Ohio have most likely hit their peak numbers of the season and a decline should be expected. While we are most likely beginning to round out of the peak for this pest, any counties with averages that are still above 7 should continue scouting until their county numbers have declined.
Western Bean Cutworm numbers are peaking in many counties across the state
This past week was our fifth week monitoring for WBC in Ohio. The statewide average for WBC decreased substantially from 9.3 during the week ending on July 14th to only 1.9 for the week ending July 21st. The counties with the highest averages are Sandusky (38.0) and Lorain (8.0) (Figure 1). Here at the Lep Network, we are fairly certain that we have already seen our peak in WBC moths for this year and are starting the decline. Despite this shift in numbers, it is still important to be scouting for WBC egg masses (Figure 2), especially if this week’s average topped 7 moths in your county. Counties that should continue scouting this week are: Defiance, Huron, Lorain, Sandusky, Wayne, and Wood.
Continue reading Lep Monitoring Network – Time to Scout for Western Bean Cutworm, Update # 14 →