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
5475315 SMPT Lethal Bronzing Palm1
Dieback or Thinning Canopy
Lethal Bronzing Of Palms
Formerly called Texas Phoenix Palm Decline, lethal bronzing of palms is a disease caused by a phytoplasma, which is a bacterium-like organism. Once symptoms appear, infected trees die.
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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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Spanworm
Dieback or Thinning Canopy
Bruce Spanworm & Winter Moth
The winter moth and the Bruce spanworm are caterpillars that defoliate trees and shrubs.
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5369697 LGPT Japanese Maple Scale Horiz
Trunk or Bark Damage
Japanese Maple Scale
Japanese maple scale is an armored insect pest that uses piercing/sucking mouthparts to feed on plant juices.
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