Peak period of spore production and initiation of new infections on aspen, cottonwood and willow. These aphids will start to appear on plums, peach, honeysuckle and other plants. Inspect and treat if needed. Avoid damage to the base of trees and shrubs with lawnmowers and string-weeders. Adults return to trees and chew holes in leaves.
Adults return to trees and lay eggs on the emerging leaves.
Sprays to protect Apple and Pear fruit from Codling Moth should be started about two weeks after petal fall. First generation begins. Gardeners often find that apple and crabapple fruit is a nuisance. Sprays to remove fruit must be applied within 30 days following full bloom. If planting trees, shrubs, or flowers into an area that has fresh wood chips or bark mulch worked in, add nitrogen fertilizer to provide the microbes with the necessary nitrogen to breakdown the wood particles.