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 Dryads Saddle Banner 1440X500
Mold or Fungus
Dryad's Saddle Mushroom
Dryad’s saddle, also known as pheasant’s back, is a large, scaled cap mushroom that can decay dead trees and the sapwood of living trees.
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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.
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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.
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Pest And Disease Hen Of The Woods Banner 1440X500
Mold or Fungus
Hen Of The Woods Mushroom
The hen of the woods mushroom, or maitake mushroom, is a fungus that is commonly found at the base of oaks and other hardwoods. It is large, dark gray-brown in color, and grows in clusters of fan-shaped, wavy caps.
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Pest And Disease Center Ips Pine Bark Beetle Banner 1440X500
Leaf or Needle Discoloration
Ips Pine Bark Beetles
Several species of IPS bark beetles (also called engraver beetles) primarily attack both pine and spruce trees. Adults are about the size of a dull pencil point and vary in color from brown to black.
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Pest And Disease Center Iron Chlorosis Banner 1440X500
Leaf or Needle Discoloration
Iron Chlorosis
Iron chlorosis is a yellowing of plant leaves often caused by iron deficiency that affects many desirable landscape plants in North America. The primary symptom of iron deficiency is interveinal chlorosis, the development of a yellow leaf with a network of dark green veins.
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Pest And Disease Center Oleander Caterpillar Banner 1440X500
Holes or Skeletonization in Leaves
Oleander Caterpillar
The oleander caterpillar is a bright orange, black-spotted pest that feeds on and skeletonizes leaves of the oleander plant.
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Pest And Disease Pitch Canker Of Pine Banner 1440X500
Substance on Leaf or Oozing
Pitch Canker Of Pine
Pitch canker of pine is a severe fungal disease that creates numerous problems for pine trees, including yellowing and browning needles, branch death and formation of cankers.
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