Insects and Spiders - native

Western Tent Caterpillar (Malacosoma californicum) on Aug 8, 2018

Originally reported as Asian Gypsy Moth (Lymantria dispar asiatica)

Submitter does not have a specimen
EDRR Status: No Response/Action Required

Description of specimen

Look like Gypsy Moth nests. Have attached pictures.
Nest in walnut tree Nest in walnut tree

Commentary

Dear Dewayne, luckily this is not the invasive Gypsy moth, but a native moth, the western tent caterpillar. Gypsy moth caterpillar do not produce webbing, the caterpillars, however, do resemble each other. If you are interested in managing the tent caterpillar, cut the nest with the caterpillar down and dispose it off. Thank you for contacting our Invasive Species Hotline. Best regards, Helmuth Rogg, Oregon Department of Agriculture

Helmuth Rogg
Aug. 10, 2018, 8:21 p.m.

Resources

Western Tent Caterpillar USDA Fact Sheet

Location

At least three nests in two different walnut trees in neighbors yard. Their house is vacant as it is being remodeled - and owner lives in California.

Expert Reviewer

Mr. Helmuth Rogg

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