Greg from Grafton, Ma writes
Gypsy moth caterpillars have been decimating the 60+ oak trees on property. Have been using bands treated w/ Suspend SC which will stop ones that come into contact w/ band but does not control caterpillars 50' up tree. What is best way to treat caterpillars 50' up tree? Thank you
Merit 2F Insecticide is not labeled for gypsy moth caterpillars, so we do not recommend it for this application. Typically for caterpillars, you would use a Bt product such as Monterey BT or DiPel PRO DF. These products must be applied topically to control the caterpillars. Unfortunately, we do not know of a systemic insecicide that will control this pest.
Answer last updated on: 06/02/2019
