Problem Identifier Unit Screen//v.w/ RR Template

Problem Identifier Unit Screen//v.w/ RR Template Boxwood Psyllid

Problem
Terminal leaves are cupped and yellowing. Buds inside the cupped leaves are often dead. There is no new growth on branch tips with damaged leaves. When the cupped leaves are peeled open, a tiny (1/16 inch), grayish green, immature insect is found inside. It is usually covered with a white, waxy material. Damage begins in early spring when buds first open. Small (1/8 inch) flies with transparent wings are sometimes seen jumping on leaves or flying around the plant in late May.

Analysis
(Psylla buxi)

The boxwood psyllid is prevalent in temperate regions of the country where boxwood is grown. American boxwood is more severely attacked than English boxwood. The immature psyllid feeds by sucking the juices from growing leaves, resulting in the yellowing and cupping. As it feeds, it secretes a white, waxy material that protects it from parasites and chemical sprays. The insect matures in early summer, and the female fly lays her eggs in the base of buds, where they remain until the following spring.

Solution
Control with an insecticide containing acephate or malathion when damage is first noticed in early spring; repeat 2 weeks later. Spray the plant thoroughly to penetrate the waxy secretions and leaf buds.

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