Other tree fruits including cherries and apples are also attacked. In the lower valley, pear thrips began to disperse from outside hosts into orchards towards the end of March and peaked the first week of April. Blocks bordering wooded habitat should be checked for presence of pear thrips. Adult thrips can be easily monitored with a beating tray. Nymphs feed on leaves and also on the fruit surface where they can be observed with a good hand lens.
Pear thrips has only one generation.
Wash. If you are curious what your local entomologist at the Experiment Station has been up to ask for a free copy of his annual research report. Give him a call at 386-2030, extension 14. The contents of this newsletter are provided for educational purposes, and are not intended to be taken as strict recommendations for treatment of any orchard pest or condition. Oregon State University Extension Service is an Equal Opportunity Employer.