Insect & Disease
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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

Red Imported Fire Ant

The red imported fire ant is an invasive species that inhabits lawns, pastures, fields and roadsides to create lumpy soil mounds. They are known to sting people and animals which can be quite painful.

Pest And Disease Twig Girdler And Twig Pruner Banner 1440X500

Dieback or Thinning Canopy

Twig Girdler & Twig Pruner

Twig girdlers and twig pruners are beetles that attack the twigs of trees. They lay eggs at the ends of branches and cut off the tips of the branch, allowing the larvae to feed on and pupate inside the twigs.

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.

Mold or Fungus

Ganoderma Butt Rot Of Urban Trees

Varnish conk, Ganoderma sessile, is a moderately aggressive species of wood decay fungi that attacks hardwoods and deciduous trees

Brown Needles On Evergreen (Pine Or Spruce) Tree

Dieback or Thinning Canopy

Winter Desiccation

Winter desiccation is a winter injury condition affecting primarily evergreen shrubs and trees. Winter desiccation occurs most often when soil moisture is low or dry. Heavy winter winds and sun can accelerate water loss and lead to this condition.

Leaf or Needle Discoloration

Pepper Tree Psyllid

A member of the insect family commonly known as “jumping plant lice,” the pepper tree psyllid sucks sap from trees, leaving a discolored and sparse tree canopy.

Brown, Spotted, or Patch Grass on Lawn

Thatch

Thatch is a dense buildup of grass stems, roots and blades that accumulates between the leaf blade base and the surface of the soil.

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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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