Recovering Western Spruce Budworm Larvae from Sticky Traps Covered with Volcanic Ash

摘要

Ash fallout from the May 18, 1980, eruption of Mount St. Helens in the State of Washington covered more than 460 sticky traps in western Montana forests. The traps were deployed to study dispersal of western spruce budworm larvae. A technique is described for removing the ash from the sticky trap surface and extracting and counting the larvae.