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Rosy Gypsy Moth

Lymantria mathura

Lymantria mathura

Photo by David Mohn, Critters Page (Creatures Great and Small), Bugwood.org

Survey Information

The Rosy Gypsy Moth (Lymantria mathura) is a potential pest of many different horticultural and native plants. Its larvae may defoliate many species of trees. Surveys are conducted due to the presence of host material in Wyoming, which includes ash, apple, pine, cherry, oak, cottonwood, and willow. To date, it has not been found in Wyoming or the US. The Wyoming Rosy Gypsy Moth Survey was conducted for the first time in 2007. Twenty-four total traps have been placed throughout twenty-two counties in Wyoming.

The Wyoming Rosy Gypsy Moth 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.

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