caterpillar eating my plants #724584 - Ask Extension


caterpillar eating my plants #724584

Asked September 16, 2020, 8:14 PM EDT

The little guy is about an inch long and is hatched in a web. The larger webs stretch over large areas of the infected plants with the caterpillars inside either a folded leaf surrounded by web or just a role of web itself. They are exfoliating both viburnum and aster. I don't want to use pesticides in my garden. What is this and how can I get rid of it?

Lane County Oregon

Expert Response

This is one of the webworms, probably fall webworm. They can be hand-picked, take a stick to destroy the webs as much as possible without damaging the plants. That makes them visible to the birds. There is a biological spray, Bacillus thurdengiensis, which is  generally available in nurseries. Of course, follow the directions exactly.
Pat Patterson Replied September 17, 2020, 11:10 PM EDT
Thank you so much Pat. I feel lucky to live in a community with this helpful excellent resource. 
Most grateful,
The Question Asker Replied September 18, 2020, 11:01 AM EDT
You are most welcome. Wasn't last night's rain terrific! I did my rain dance when it came about 2 am.
Pat Patterson Replied September 18, 2020, 12:11 PM EDT

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