Japanese Beetles Have Started To Emerge

Posted on June 27, 2023 by Cassie Russell

Back by not so popular demand, Japanese Beetle (Popillia japonica) adults are starting to emerge and take flight in southern Ontario! We caught our first adults in pheromone traps on June 23rd in Guelph.

Look for these shiny green and copper beetles feeding on grape leaves, roses and many other trees and shrubs.  Where possible, homeowners can knock adults into a bucket of soapy water (to smother them).  Several insecticides are registered for the adults in the nursery, including BeetleGONE and Imidan.

Preventative applications of Intercept and Acelepryn are registered for white grubs (e.g. European chafer, June beetle, and/or Japanese beetle) in nursery and greenhouse production and the application period begins now.

If you’re looking for more direction on what can be applied (and when) for JB control for phytosanitary measures, below is a link to the JB control infographic and article from a few months ago: