May. Eggs are laid at the base of the buds. Feeding punctures cause a cupping of the terminal leaves. There is only one generation a year. Chlorpyrifos or insecticidal soap, which are among the compounds registered for control of this pest in Connecticut, applied in late May have been effective against psyllids. Consult the label for dosage rates and safety precautions.
English boxwood is somewhat resistant.
Mites , Tetranychus telarius and Eurytetranychus buxi . These mites may injure ornamental boxwoods, especially in hot, dry seasons. The first species varies in color from pale yellow to purplish red with conspicuous dark spots. The other mite is green to yellowish brown. Injured foliage appears blanched or silvery.