The University of Alaska Fairbanks Cooperative Extension Service said the moths, in caterpillar form, have munched the blueberry bushes to such an extent that they cannot bear fruit this year.
They have also denuded salmonberry bushes, willows, alders and birch trees, according to the extension service.
The berry loss is a disappointment to residents and visitors to the region, where picking is a common summer ritual.
State biologists say bears might now conduct additional raids on trash cans due to the loss of their natural sweet snack.
Photo: tbarnardiii - Flickr