University of Missouri’s Pest Monitoring Network is reporting the first Japanese beetle captures of 2026 and calling for growers to begin scouting soybean and corn crops.
Although trap captures are currently low, these first detections indicate that Japanese beetles are beginning to emerge, said MU Extension state crops entomologist Ivair Valmorbida. She added economic damage is unlikely at this time, but farmers should begin scouting soybean and corn fields and monitor populations closely so they can determine whether a foliar insecticide treatment is warranted.
The Japanese beetle (Popillia japonica Newman) is an invasive species in the United States. This species has one generation per year in Missouri, and adults feed on several plant species, including soybeans and corn.
PHOTO: Japanese beetle on a leaf. (iStock-#1449888069 │ Wirestock)
