The use of Bacillus thuringiensis at bloom, preceded by a dormant spray oil treatment for scale and mite eggs. Monitor before treating to assure that you have the pest and to properly time application. The following materials are listed in order of usefulness in an IPM program, taking into account efficacy and impact on natural enemies. Apply before blossoms open, or injury may occur. Do not graze livestock in treated areas or feed them treated cover crops.
Organophosphate insecticides used during delayed dormancy are very toxic to honey bees.
Remove bees from orchard if cover crops or weeds are in bloom. Oil sprays may injure trees that are water stressed. It is advisable to postpone an oil application to water-stressed trees until winter rains have replenished soil water and the tree bark is noticeably moist. Apply before blossoms open, or injury may occur. Do not graze livestock in treated areas or feed them treated cover crops.