Bagworm on pine (Colorado spruce)

Question

What pesticide can be used to get rid of bagworm on a Colorado spruce tree? This is the 2nd year that we noticed this pest on our tree, but we did not recognize what kind of pest it was until very recently when I searched online and learned about it, which is already late. Unfortunately, as they are so many, it is very difficult to pick and kill them. Is there any other way to get rid of them before the damage is done? I really appreciate your advice in this matter. Thanks.

Answer 1

Here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/pests/treatment-bagworms.htm