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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
Woolly Hackberry Aphids J Douch
Substance on Leaf or Oozing
Woolly Hackberry Aphid
Woolly hackberry aphids (WHA), also called Asian woolly hackberry aphids, are an invasive species from China that are small and usually without wings. They look like fuzzy, white masses found on the underside of stems and leaves
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IMG 5584 Bark Beetles Under The Bark TW
Dieback or Thinning Canopy
Bark Beetle Management
Bark beetles are tiny insects that feed under the bark of trees and disrupt the vascular system. There are numerous species that are pests of landscape trees worldwide.
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Magnolia Scale Adults
Mold or Fungus
Magnolia Scale
Magnolia scale, This the largest of the soft scale. Adult female scales are relatively large, up to ½ inch and peach to gray in color, often with a fuzzy white covering. Feeding by the insect can stress trees, resulting in twig dieback and a decline in tree health.
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5369697 LGPT Japanese Maple Scale Horiz
Trunk or Bark Damage
Japanese Maple Scale
Japanese maple scale is an armored insect pest that uses piercing/sucking mouthparts to feed on plant juices.
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Pest And Disease Bacterial Leaf Scorch Banner 1440X500
Leaf or Needle Dropping
Bacterial Leaf Scorch
Bacterial leaf scorch, also known as Marginal leaf burn, is a chronic and systemic disease mostly affecting oaks and maples.
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Pest And Disease Btb Tunneling Banner 1440X500
Sawdust on Trunk
Black Twig Borer
Black Twig Borers are a species of the ambrosia beetle group that are small, round and dark brown/black in appearance.
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Pest And Disease Brittle Cinder Fungus Banner 1440X500
Trunk or Bark Damage
Brittle Cinder Fungus
Brittle cinder fungus, or Kretzschmaria deusta, is a fungal pathogen that causes breakage in seemingly healthy trees. The fungus appears around the base of trees as a crust-like fruiting body that has wavy edges.
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Pest And Disease Center Euonymus Scale Banner 1440X500
Leaf or Needle Discoloration
Euonymus Scale
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