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

Webs or Bags

Fall Webworm

Fall webworm larvae are pale greenish-yellow with either black or red heads. They have two rows of black spots along their backs and scattered long hairs along their bodies. The caterpillars transform into white moths in the spring.

Dieback or Thinning Canopy

Maple Decline

Maple decline is a condition that causes dieback in maple trees.

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.

Pest And Disease Powdery Mildew Trees And Shrubs Banner 1440X500

Substance on Leaf or Oozing

Powdery Mildew (Trees & Shrubs)

Powdery mildews, caused by numerous species of fungi, create a white powdery appearance on landscape plants.

Brown, Spotted, or Patch Grass on Lawn

Pythium Blight

Pythium blight is a destructive lawn disease that causes small, light brown, matted spots on grass.

Leaf or Needle Discoloration

Rhizosphaera Needle Cast

Rhizosphaera is a fungal genus that affects cone-bearing shrubs and trees throughout the Northern hemisphere.

Sawdust on Trunk

Southern Pine Beetle

Southern pine beetle (SPB) is a 1/8 inch to 1/4 inch wood-boring insect that infests pine trees, killing even large trees very quickly. It is one of the most destructive pests in the Southern and Southeastern United States.

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Mold or Fungus

Vascular Wilt Diseases

Vascular wilt diseases are caused by different fungi that attack the vascular (water-conducting) system of trees. A tree responds by blocking its vascular system to contain the disease. In doing so, the water supply to the leaves is cut off.

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