By Nebraska Extension Horticulture Educator Kathleen Cue
The most important thing to understand about Japanese beetles is their feeding doesn’t kill trees, shrubs and flowers. Granted, it isn’t fun to see the lacy leaves they’ve created, but pesticide management options require thought and planning before you set out for revenge.
Systemic insecticides, for instance those containing the active ingredient imidacloprid, are taken in by plant tissues. Systemics may have a label for application to trees and shrubs but before these are used, the applicator should make sure the plant is past its flowering stage in order to protect pollinators. Also, a systemic product can never be used on linden trees.
