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 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.
Pest And Disease Pythium Blight Banner 1440X500
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.
Pest And Disease Center Powdery Red Imported Fire Ant Banner1440x500
Red Imported Fire Ant
The red imported fire ant is an invasive species that inhabits lawns, pastures, fields and roadsides to create lumpy soil mounds. They are known to sting people and animals which can be quite painful.
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.
Pest And Disease Rhizosphaera Needlecast Banner 1440X500
Leaf or Needle Discoloration
Rhizosphaera Needle Cast
Rhizosphaera is a fungal genus that affects cone-bearing shrubs and trees throughout the Northern hemisphere.
Pest And Disease Center Rust Disease Banner1440x500
Brown, Spotted, or Patch Grass on Lawn
Rust Disease
Rust disease first appears as small, yellowish-orange to reddish-brown flecks on grass blades and eventually grows into raised pustules on blades and stems.
Pest And Disease Center Scale Insects Banner 1440X500
Leaf or Needle Discoloration
Scale Insects
Scales are sap-sucking insects common on backyard trees and ornamental shrubs. These pests are mostly immobile and appear similar to shell-like bumps rather than insects.
Pest And Disease Center Seiridium Canker Of Leyland Cypress Banner 1440X500
Mold or Fungus
Seiridium Canker Of Leyland Cypress
Seiridium canker of leyland cypress is a fungal disease that produces oozing brown cankers and causes yellowing and browning of tree branches.
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