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
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.
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.
Spanworm
Dieback or Thinning Canopy
Bruce Spanworm & Winter Moth
The winter moth and the Bruce spanworm are caterpillars that defoliate trees and shrubs.
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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