After completion of the egg sac, the female dies, dries up, and falls to the ground. Host plants include camellia, holly, taxus, rhododendron, hydrangea, maple, and English ivy. When necessary, treat June l0-20. Cottony Maple Scale Large, conspicuous, white egg sacs are produced on the twigs and small branches of host plants. During summer, immature scales feed on leaves, but they migrate to twigs as fall approaches.
Honeydew excreted by the scales supports unsightly, sooty mold growth.
Cottony maple scale is most common on silver maple, but also found on other maples, boxelder, linden, black locust, red mulberry, white ash, apple, beech, cherry, dogwood, elm, hickory, holly, honeylocust, peach, plum, sycamore, willow, and others. There is one generation per year with crawlers active June 5-25. When necessary, treat on both June l0 and 20. Cottony Maple Leaf Scale Conspicuous, cottony egg sacs, similar to cottony maple scale, but produced on the leaves. Occurs on maple, dogwood, holly, andromeda, and gum.