Insect & Disease Resource Center
Search Results
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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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Hen of the woods Mushroom
The hen of the woods mushroom, or maitake mushroom, is a fungus that is commonly found at the base of oaks and other hardwoods. It is large, dark gray-brown in color and grows in clusters of fan-shaped, wavy caps. This mushroom gets its name from resembling a hen sitting on her nest. It also is known by the name ram’s head or sheep’s head because it resembles ram and sheep fur.
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Hypoxylon Canker of Oaks
Hypoxylon can be identified by the dark-colored, crusty fungus tissue on dead, cankered areas. Light colored spore masses are frequently seen on branches and stems of severely affected trees.
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Leaf Spot & Melting-Out
Leaf spot and melting-out are turfgrass fungal diseases that can cause indefinite yellowing and thinning of grass, as well as large patches of dead turfgrass.
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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.
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Northern Tooth Fungus
Northern tooth fungus grows on living, deciduous trees. The fungus grows in shelves of fruiting bodies that overlap in clusters.
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Oak Bracket Fungus
Oak bracket is a fibrous, “weeping” fungus that grows at the base of oak trees. The thick fruiting body is called a conk and varies from 2-12cm in width. The surface is a creamy brown color with pitted tubes that secrete an orange/amber liquid when young.