Cherry Bark Tortrix

Enarmonia formosana

Enarmia formosana

Photo by Eric LaGasa, Washington State Dept. of Agriculture,

Survey Information

The Cherry Bark Tortrix (Enarmonia formosana) is a pest of practically all rosaceous trees including apples, cherries, plum and crabapple. Larvae feed under the bark causing the bark to loosen and crack. Surveys are conducted because of the presence of potential host material in Wyoming and potential introduction pathways from surrounding states. It has been found in Washington and Oregon. To date, it has not been found in Wyoming. Ninety-two total traps have been placed throughout twenty-three counties in Wyoming.

The Wyoming Cherry Bark Tortrix Survey is conducted by the Wyoming Pest Detection / CAPS Program. A sticky trap with pheromone attractant is placed on or near the host plant from May until August. The traps are monitored for suspects and serviced once a month. If suspects are found they are sent to the University of Wyoming for further identification.



Contact Us

WY CAPS Program

University of Wyoming

Dept. Ecosystem Science & Management: 3354

1000 East University Ave.

Laramie, WY 82071

Phone: (307)766-5278


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