Killing Tent Caterpillars

We had tent caterpillars on our fruit trees. If left alone they will strip all of the leaves off. I put in a small spray bottle 25% water and 75% vegetable oil. You will need to shake it often. I spray the tent and/or caterpillars as I see them. Sometimes I will break open the tent with a stick, but it isn't necessary. They die instantly, all of them. Tent caterpillars come and go on a cycle. Some years there are very few and others you can be overrun with them.