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 Chicken Of The Woods Banner 1440X500
Trunk or Bark Damage
Chicken Of The Woods Mushroom
Chicken of the woods is an edible mushroom with a texture and taste that is said to resemble chicken. The fruiting bodies tend to have many shelves, and can be found up a tree trunk or as a cluster at the base of a tree.
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Pest And Disease Deadman Fingers Banner 1440X500
Mold or Fungus
Dead Man's Fingers Fungus
Dead man’s fingers is a fungal pathogen that grows in small towering groups of three to six mushrooms and resemble fingers coming out of the ground.
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Pest And Disease Dogwood Anthracnose Banner 1440X500
Spotting on Leaf
Dogwood Anthracnose
Dogwoods are treasured landscape trees. A destructive disease known as anthracnose can tarnish their beauty, degrade their health, or even kill the tree.
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Pest And Disease Horned And Gouty Oak Galls Banner 1440X500
Growth on Foliage or Branch
Horned & Gouty Oak Galls
There are various species of wasps that may infest oak trees, but two common species include the horned oak gall wasp (Callirhytis cornigera) and the gouty oak gall wasp (Callirhytis quercuspunctata). These pests cause galls, or abnormal plant growths, found on foliage and twigs.
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