John from Skidaway Island writes
Treating browntail moths with tree injections
Acephate 97UP Insecticide is not labeled to be used for tree injection. It can be used to a few species of caterpillars, please read the product label for a complete list and application instructions. Otherwise, Permethrin SFR 36.8% can be effective against Browntail Moths but direct contact must be made to increase the effectiveness. Pesticides should be applied when caterpillars are small and feeding, usually before the end of May.
Control of browntail moth populations in isolated areas may be obtained by clipping the overwintering webs and destroying these webs by either soaking in soapy water or burning them, according to the law ordinances in your county. This control should be undertaken in the winter and very early spring. For more information, you can contact your local cooperative extension office.
Answer last updated on: 06/27/2022
