Insect & Disease Resource Center
Search Results
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Elm Leaf Beetle
When populations are large, elm leaf beetle larvae and adults can completely defoliate elms. Adults chew small, circular holes. Infested trees appear drought-stricken and brown or scorched. After the beetles feed, only the lacy vein structure of the leaf remains. Leaves quickly turn brown, curl and detach.
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Euonymus Scale
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Hemlock Woolly Adelgid
Hemlock woolly adelgid (HWA) is a serious pest that is related to aphids. Hemlock woolly adelgids injure hemlocks by sucking sap from needles and twigs.
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IPS Pine Bark Beetles
Several species of IPS bark beetles (also called engraver beetles) primarily attack both pine and spruce trees. Adults are about the size of a dull pencil point and vary in color from brown to black.
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Japanese Beetle Control on Woody Ornamentals
Japanese beetles are pests in the U.S. found primarily east of the Mississippi, but are rapidly spreading westward. Adults are 3/8”-1/2” long with metallic green bodies and copper/bronze wings.
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Lace Bugs
Lace bugs are sap-sucking pests that feed on deciduous and evergreen plants during the spring and summer, weakening their host plants. These pests thrive in full sun under dry conditions. Depending on the species, they are about 1/8-inch long and whitish with tan markings. Their most distinctive physical trait is, of course, lace-like front wings.
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Needle Blight and Cast of Pines
Brown spot needle blight, Cyclaneusma needle cast, Dothistroma needle blight, and Lophodermium needle cast are common fungal diseases that attack pine needles, causing spots, blights, and premature defoliation.