1.  Boxwood Psyllid
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.