The tail-end of summer is here and fall webworms are beginning to infest Wyoming trees.

They aren't actually worms, though. They're moth larvae.

They make thick, sticky web sacks around the branches of trees, providing a shelter and communal feeding ground for the caterpillars.

Fall webworms typically remain active for about six weeks in their larval stage as caterpillars.

After this, they pupate in cocoons, overwintering in this state until the following spring when they emerge as adult moths. The webs they create can persist longer, potentially into the winter

While many insects are beneficial for trees, these caterpillars are not.

They're ugly, but they can also cause damage to your trees.

Early treatment is key, if you're concerned for your own trees.

Better Homes and Gardens c

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