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Insect and Disease Management Common Tree and Shrub Pests Peach scale: This insect infects cherry, plums and other fruit trees. It is white and powdery, and feeds along the stem of the trees. They pierce and suck nutrients while protected by a shell that makes them difficult to control. Hemlock woolly adelgid: A new serious insect to the area that feeds on hemlock needles. They are small cottony balls found on the underside of the needle. Easy to control, they do require constant maintenance. Apple scab: Most ornamental fruit trees are infected with this disease. Cool, wet conditions infect leaves in spring and causes black stains and leaf-drop by mid summer. Anthracnose: Another cool wet weather pest. Many shade trees, such as Norway maples, oaks and sycamores have been affected these past few years. Infected in spring, it causes the edges of the leaf to curl, turn black and drop. Needlecast: this infects spruces, firs and especially Austrian pines. It is also a cool wet season pest. On Austrian pines, the larvae of a small moth often feeds on developing buds while infected with this disease. Mites: Mostly a problem of evergreens such as arborvitae, spruces and hemlocks, its’ damage causes a bronze-like color to the foliage. |

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