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 Ash Whiteflies Banner 1440X500
Leaf or Needle Discoloration
Whitefly
Although they look like miniature white moths, whiteflies are neither moths nor flies. Instead, they are insects of varying species in the order of Homoptera, which also includes aphids, scales, and mealybugs.
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Pest And Disease Cankerworm Banner 1440X500
Holes or Skeletonization in Leaves
Cankerworms
Cankerworms are caterpillars of several North American moths that have wingless females. Cankerworms feed on the buds and leaves of trees in early spring and can be a major pest.
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Pest And Disease Center Cedar Rust Banner 1440X500
Mold or Fungus
Cedar Rust
There are multiple rust fungi that affect cedars (junipers): cedar-quince rust, cedar-hawthorn rust and cedar-apple rust. All of these rusts require two different hosts and alternate between them during the year. Cedar-quince rust appears as elongated branch swellings that produce orange spores.
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Pest And Disease Center Cottony Maple Scale Banner 1440X500
Mold or Fungus
Cottony Maple Scale
The cottony maple scale is a large, flat, brown scale insect found on the twigs and branches of various trees. White, cottony egg masses that resemble popcorn are its most distinguishing feature.
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Pest And Disease Center Diplodia Tip Blight Banner 1440X500
Leaf or Needle Discoloration
Diplodia Tip Blight
Diplodia tip blight of pines (formerly known as Sphaeropsis tip blight) is caused by the fungus Diplodia pinea. The fungus can live in dead needles, branches, and cones of the tree all year round.
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Pest And Disease False Oleander Scale Banner 1440X500
Leaf or Needle Discoloration
False Oleander Scale
False oleander scale is one of the most serious pests affecting ornamentals in southern regions such as Florida, appearing as numerous white specks or larger, blurry spots (clusters of these insects) on plant leaves
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Pest And Resource Center Ambrosia Beetle Banner 1440X500
Sawdust on Trunk
Granulate Asian Ambrosia Beetle
The Granulate ambrosia beetle, or Asian ambrosia beetle, is a small, dark reddish-brown insect that is native to Asia.It has become established in more than 25 states in the United States.
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Pest And Disease Iron Deficiency Chlorosis In Turfgrass Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Iron Deficiency Chlorosis In Turfgrass
Iron deficiency chlorosis (IDC) is a condition caused by lack of iron. The disorder can be found in various species of turfgrass, but commonly in St. Augustinegrass. Yellow, blotchy patches form in a lawn after blades turn pale green and eventually bright yellow.
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