Summary: The objectives of this project were: 1. Identify the bark beetle species attacking pome and stone fruit throughout the state. (completed) 2. Develop a clear understanding of the seasonal life history of bark beetles in Washington State and compare that with currently available information. (completed) 3. Examine methods of monitoring bark beetles. (completed) 4. Develop a means to predict beetle activity at any location. (partially completed) 5. Determine the distance bark beetles move from a source to attack healthy orchard trees. (completed) 6. Develop a laboratory rearing procedure for bark beetles. (partially completed) 7. Determine host suitability of various tree fruits (completed) and other deciduous trees (partially completed) for bark beetle reproduction. Identify other secondary decomposing beetles found in suspected bark beetle host material. (not completed) 8. Develop a bioassay technique for assessing relative toxicity of candidate insecticides. (completed) Validate insecticide bioassay results and evaluate new candidate insecticides for efficacy and longevity. (completed) 9. Document successful control strategies in heavily infested orchards. (completed)
