Note - this was sent as a contact message, but subsequently decided to join the forum

We bought your Texas Bug Book, Good, bad and ugly - grandkids love it and it also motivated me to try some "organic" solutions to rural problems. The big one currently is my Oak trees are literally curtains of caterpillars on a string. I have found a source of tricogramma wasps. I'd like to start with several of the trees close to the house. What would be my best/most cost effective plan to get control of these pests? Sick of wearing a caterpillar coat.

Mark