Biology and Management of Secondary Pests of Apple
Author: Elizabeth H. Beers, Stephen D. Cockfield, Vince Jones, Keith Pike, Gennaro Fazio
Published: 2006
Summary: The objectives of this project were: 1. Woolly apple aphid. 1a. Test chemical control tactics for aerial colonies with field trials. 1b. Test chemical control tactics for root colonies with both greenhouse assays and field studies. 1c. Determine the life history of woolly apple aphid in different growing regions of Washington. 1d. Evaluate widely planted as well as newly developed rootstocks for resistance to local woolly apple aphid biotypes. 2. Rosy apple aphid. 2a. Determine the herbaceous hosts of rosy apple aphid in Washington. 2b. Determine if rosy apple aphid is capable of continuous reproduction on apple. 2c. Determine species and relative abundance of natural enemies of the rosy apple aphid on both woody and summer hosts. 2d. Determine the time of susceptibility of fruit to injury by rosy apple aphid colonies. 3. Western flower thrips. 3a. Determine source of thrips attacking fruit using protein markers. 3b. Determine phenology of thrips oviposition on apple around bloom. 3c. Determine the optimum timing of thrips control with insecticides.
