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 Fall Webworm Banner 1440X500
Webs or Bags
Fall Webworm
Fall webworm larvae are pale greenish-yellow with either black or red heads. They have two rows of black spots along their backs and scattered long hairs along their bodies. The caterpillars transform into white moths in the spring.
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
Pest And Disease Center Fire Blight Banner 1440X500
Wilted or Curled Leaves
Fire Blight
Fire Blight is a bacterial disease affecting apples, pears, and some other members of the family Rosaceae. It is a serious concern to apple and pear producers. Under the right conditions, it can destroy an entire orchard in a single growing season.
Pest And Disease Fusarium Blight Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Fusarium Blight / Summer Patch
Fusarium blight or summer patch diseases are fungal diseases caused by weak pathogenic fungi that infect turf impacted by adverse environmental or cultural factors.
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.
Pest And Disease Gray Leaf Spot Disease Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn
Gray Leaf Spot Disease
Gray Leaf Spot (GLS) is a fungal disease that affects various turfgrasses. Lesions start as olive green to brown, water-soaked dots, no larger than a pinhead. As the infection progresses, the lesions become larger and ash-colored with purple to brown margins.
Pest And Disease Center Gray Snow Moldt Banner 1440X500
Mold or Fungus
Gray Snow Mold
Gray snow mold is a fungal disease that attacks turfgrass in areas where there are extended periods of snow cover. It is easier to manage if treated in a timely manner but can be fatal to turfgrass if left untreated.
Pest And Disease Center Gypsy Moth Banner 1440X500
Leaf or Needle Discoloration
Spongy Moth (Formerly Gypsy Moth)
Spongy moths are insects who can cause extreme defoliation to trees when in their caterpillar stage.
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