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
Thyronectria Canker
Mold or Fungus
Thyronectria Canker
Thryonectria canker is caused by a fungus called Thyronectria austroamericana. It infects honeylocust, especially those stressed from other factors. The fungus causes cankers, on branches and trunks.
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Pest And Disease Tick Control Banner 1440X500
Tick Control
Ticks are small, wingless, bloodsucking arthropods. They burrow their heads into their host and can change drastically in shape, color and size when they become engorged with blood. Ticks have extremely small mouths that usually go unnoticed when they bite.
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Pest And Disease Turkey Tail Banner 1440X500
Mold or Fungus
Turkey Tails
Turkey tail is a polypore mushroom that gets its name from the variety of colors and shape that resemble the tail feathers of wild turkeys.
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Pest And Disease Verticillium Wilt Banner 1440X500
Leaf or Needle Discoloration
Verticillium Wilt
Verticillium wilt is a fungal disease that causes serious injury and often death to its host. It is caused by the fungus Verticillium dahliae and can live in the soil for long periods of time without showing any signs.
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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 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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