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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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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