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 Leafminer Banner 1440X500
Leaf or Needle Discoloration
Arborvitae Leafminer
Arborvitae or cedar leafminers are larvae of small, silver and tan moths. The larvae are small, brownish-black caterpillars that burrow into the leaves of plants.
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Pest And Disease Bagworms Banner 1440X500
Leaf or Needle Dropping
Bagworms
Bagworms are destructive pests of shrubs and woody ornamentals that are native to North America. Their spindle-shaped protective bags made from silk, debris and foliage provide camouflage, so they go unnoticed until there is significant plant damage.
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Pest And Disease Blackturpentine Beetle Banner 1440X500 1
Mold or Fungus
Black Turpentine Beetle
The Black Turpentine Beetle is a common pest that affects pine trees throughout the United States.
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Pest And Disease Boxwood Decline Banner 1440X500
Substance on Leaf or Oozing
Boxwood Insects & Mite Pests
There are three types of insects and mites that attack boxwoods Boxwood psyllid, Boxwood leafminer and Boxwood spider mites.
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Pest And Disease Oak Galls Banner 1440X500
Growth on Foliage or Branch
Oak Galls
Oak galls are abnormal plant growths found on foliage and twigs that are produced by small oak gall wasps. Shapes of galls vary from spherical to urn-shaped to star-shaped to fuzzy. Inside the galls are the eggs and larvae of the insects.
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Ss 456412858 Chlorosis On Cherry Tree
Wilted or Curled Leaves
Pest Management | Stress Reduction
There are many abiotic and biotic stressors that can negatively impact tree health. Common stressors can include: air pollution, drought, flooding, improper planting and mechanical injury.
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Pest And Disease Center Photinia Leaf Spot Banner 1440X500
Mold or Fungus
Photinia Leaf Spot
Photinia leaf spot is a fungus that discolors and destroys plant leaves in the cool, wet elements of spring and fall.
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Pest And Disease Pine Tip And Pine Shoot Moth Banner 1440X500
Webs or Bags
Pine Tip & Pine Shoot Moths
Pine tip and pine shoot moths are the caterpillars of moths that attack conifer trees, causing a drought-like appearance to the tree.
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