If more than three fruits per half hour of inspection show feeding damage, spots of excrement, or active bugs, or if there is one damaged fruit per 100 peeled, treatment probably is required to avoid economic loss by end of harvest. This treatment should be applied to the trees. The following materials are listed in order of usefulness in an IPM program, taking into account efficacy and impact on natural enemies. Apply a thorough, drenching ground spray when adults begin activity. Dimethoate can be applied with oil during bloom.
Treatment is applied to trees.
Dimethoate is harmful to beneficial mites and pear psylla predators. Do not apply within this many days of harvest. The Regents of the University of California. All rights reserved. For noncommercial purposes only, any Web site may link directly to this page or photo file.