Preventing webworms

Question

I have been told that webworms spend the winter in the ground and that if I apply a granular insecticide to the grass around the base of the tree, from the trunk to about ten feet out (ten-foot radius from the trunk) in late winter or early spring, that the worms will be killed as they emerge from the ground. Is this true?

Answer 1

Here is a couple of great links with more information.

https://www.gardeningknowhow.com/plant-problems/pests/insects/controlling-fall-webworms.htm
https://www.gardeningknowhow.com/lawn-care/lgen/controlling-sod-webworms.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/tent-worms-control.htm