The Minnesota Department of Agriculture (MDA) is preparing to treat four areas in or near Cloquet, Duluth, Ely and Two Harbors to eradicate gypsy moth infestations detected in those areas last fall. Officials will conduct the treatments starting sometime between June 4 and 15, with the exact dates determined by weather conditions and caterpillar development.

In Cloquet, the treatment will focus on a 460-acre area that runs north of state Highway 45 up to Pearl and State streets.

To eradicate the moths before they spread, officials will conduct two aerial applications of Bacillus thuringiensis var. kurstaki (Btk) over each of the areas, spaced seven to 10 days apart. Btk is a biological product that is organic certified for food crops. It has no known health effects for humans, pets, birds, fish, livestock, bees and other insects.

For more information, call the Arrest the Pest Info Line at 888-545-MOTH or visit