It’s all about the soil! Build the soil and the life in it to better protect the water essential to all life. Mulch the World!
I have squished them with my bare hands, blasted the nests open with a power hose, sprayed them with vinegar, burned them alive with a blow torch, and for those that survived all that, drowned them in soapy water. Yes, we are talking about tent caterpillars. Fair warning: this post is not for the faint of heart!