Today, June 5, 2020 Japanese beetles were reported in Central Northeast Missouri, specifically Boone County. The Japanese beetles were reported on the University of Missouri Integrated Pest Management website. The trapping network has eleven sites around Missouri trapping for Japanese beetles. The Japanese beetles were caught in a pheromone trap. On the IPM website you can sign up to receive pest alerts. The trapping network is conducted by MU regional agronomy and horticulture Extension professionals.
With wet soil conditions throughout most of Missouri there will be an opportunity for the adults to easily emerge in the coming days and weeks. A natural enemy of Japanese beetles has been established in Missouri. A small wasp —Tiphia vernalis (Hymenoptera Tiphiidae) that parasitizes the Japanese Beetle larva. Hopefully biocontrol agents will help reduce Japanese beetle populations. — Dean Volenberg, University of Missouri Grape & Wine Institute