Department of Agriculture finishes gypsy moth spraying over Port - KPTV - FOX 12

Department of Agriculture finishes gypsy moth spraying over Portland

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Female European gypsy moth, that looks similar to an Asian gypsy moth. Photo: John H. Ghent, USDA Forest Service, Bugwood.org Female European gypsy moth, that looks similar to an Asian gypsy moth. Photo: John H. Ghent, USDA Forest Service, Bugwood.org
Gypsy moth spray area. (Map: Oregon Department of Agriculture) Gypsy moth spray area. (Map: Oregon Department of Agriculture)
PORTLAND, OR (KPTV) -

The Oregon Department of Agriculture has completed spraying insecticide for gypsy moths over more than 8,000 acres in the metro area.

The treatments began April 16 and included three aerial applications of the biological insecticide Bacillus thuringiensis var. kurstaki.

The Department of Agriculture said the insecticide is a naturally occurring bacterium that has been used in other similar projects throughout the U.S. and in Oregon since 1984.

The treated areas include St. Johns, west Hayden Island, Linnton, a portion of Forest Park, and an industrial area of the Port of Portland. A portion of the Port of Vancouver, including a small residential area, was also sprayed on behalf of the Washington State Department of Agriculture.

Last summer, three Asian gypsy moths and two European gypsy moths were detected in the area, including one Asian gypsy moth on the Washington side of the Columbia River.

The gypsy moth is not native to Oregon and is considered a serious pest of trees and shrubs, according to agriculture officials.

Gypsy moth traps will remain in place over the summer to detect any adult male gypsy moths that may emerge in the coming months. 

The eradication project was approved by state and federal officials.

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