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Insect & Disease
Resource Center

Signs of pests and diseases will vary from tree to tree. Search our database of pests and diseases for symptoms, damages, life cycle, management, and control information.

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Damage & Symptoms
Pest And Disease Oyster Mushroom Banner 1440X500
Mold or Fungus
Oyster Mushrooms
Oyster mushrooms are very common fungi that are found all over the world. They grow in a flat, broad fan shape and range in colors from white, gray, tan and dark brown. The surface is smooth and the underside shows layers of gills.
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Pest And Disease Pine Wilt Banner 1440X500
Leaf or Needle Discoloration
Pine Wilt Disease
Pine wilt disease is caused by tiny worms called pine wood nematodes and beetles called sawyers that work together resulting in a disease that rapidly discolors and kills pine trees.
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Pest And Disease Center Pink Snow Mold Banner 1440X500
Mold or Fungus
Pink Snow Mold
Pink snow mold is a fungal disease that creates patches of dense, whitish-pink grass blades in winter and spring.
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Pest And Disease Red Thread And Pink Patch Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Red Thread & Pink Patch
Red thread and pink patch are closely related fungal pathogens that infect turf, appearing with a reddish-brown covering and wilted patches.
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Shutterstock 1485999227 Plums Monilinia Brown Rot
Mold or Fungus
Monilinia Brown Rot
Brown rot is a common fungal disease that attacks trees with stone fruits. It infects flowers, fruits and branches, sometimes destroying entire crops.
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Pest And Disease Borers Banner 1440X500
Trunk or Bark Damage
Tree Borers
Borers are chewing insects, usually in larval stages, that chew and feed on the inner bark and/or wood of trees. Most species are the larvae of beetles.
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Pest And Disease Crabgrass Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Crabgrass
There are several species of crabgrass. Common crabgrass is one of the most undesirable and dominant weeds in home lawns. A lighter shade of green than typical turfgrasses, it has a coarse texture and clumpy appearance.
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Pest And Disease Dollar Spot Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Dollar Spot Fungus
Dollar spot is caused by a fungus that causes blight to grass blades, but does not harm roots or crowns. Infections start as small circular areas about the size of a silver dollar, hence the name.
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