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 Center Winter Moth Banner 1440X500
Leaf or Needle Discoloration
Winter Moth
The male fringe-winged winter moth is often seen in homes and around lights and holiday decorations in December and January. This invasive pest arrived in the U.S. and Canada from Europe.
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Pest And Disease Wood Decay Fungi Banner 1440X500
Mold or Fungus
Wood Decay Fungi In The Landscape
Certain fungi attack multiple species of trees. Mushroom growths, called conks, are seen on the lower portion of the trunk and vary in shape, size and color.
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Pest And Disease Center Zimmerman Pine Moth Banner 1440X500
Webs or Bags
Zimmerman Pine Moth
Zimmerman pine moths are 5/8” long with gray wings marked with mottled red and gray. Once a year, their larvae hatch and tunnel into trees, interfering with the tree’s sap flow and weakening them. Eventually, wind may break the weakened tops.
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Gloomy Scale2
Trunk or Bark Damage
Gloomy Scale
Gloomy scale, is an armored scale insect pest of ornamental trees, most commonly found on the red maple. They are found throughout the Southeastern United States as far north as Maryland, south to Florida and west to Texas.
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Ss 2033439272 Septoria Pear
Mold or Fungus
Fungal Leaf Spot On Trees
Fungal leaf spot on trees is caused by various species of Phomopsis, Septoria and other fungal pathogens. Infections may cause partial or even complete defoliation.
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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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Fusarium Len Burkhart AD Lt
Wilted or Curled Leaves
Fusarium Wilt Of Palms
Fusarium wilt of palms is caused by a fungus that blocks the vascular tissue (xylem), which transports water and nutrients. There is no cure, so infected trees eventually die.
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SAPW Infested Canary Island Date Palm
Leaf or Needle Discoloration
South American Palm Weevil
These beetles lay eggs in the growing point of the palm and when they hatch the large larvae feed on the growing point tissue (heart of palm).
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