Insect & Disease
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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 Center Mole Crickets Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Mole Crickets
Mole crickets are pests that tunnel through turf to feed on and ultimately damage roots. Their unique front legs enable them to burrow through lawn soil, creating both a hideaway and feeding spot.
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Pest And Disease Oak Bracket Banner 1440X500
Mold or Fungus
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.
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Pest And Disease Phytophthora Diseases Banner 1440X500
Leaf or Needle Discoloration
Phytophthora Diseases
Phytophthora is a genus containing many species of fungal-like organisms that cause blights, wilts, cankers, root rots and dieback on many plant species around the world.
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Shutterstock 1541742800 Conifer Needles Brn
Leaf or Needle Dropping
Seasonal Needle Drop Of Conifers
Coniferous trees often lose their aging needles on a 2-3 years natural life cycle. Aging needles turn yellow, then brown and drop.
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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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Pest And Disease Eastern Spruce Gall Adelgid Banner 1440X500
Growth on Foliage or Branch
Eastern Spruce Gall Adelgid
The Eastern spruce gall adelgid, Adelges abietis, is a soft-bodied, aphid-like insect that sucks plant juices. As immature adelgids feed, they form cone-shaped galls containing more adelgids. These galls can cause disfigurement and weaken trees, which may lead to their decline or death.
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Pest And Disease Elongate Hemlock Scale Banner 1440X500
Leaf or Needle Discoloration
Elongate Hemlock Scale
Elongate hemlock scale is an armored scale pest with a hard, waxy coating. Small, oblong, flattened insects appear on lower needle surfaces.
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