Common Tree Problems

Gypsy Moth

Gypsy moth larvae defoliate trees leaving them weakened and vulnerable to secondary fungal and insect invaders. Gypsy moth will affect trees in natural settings, forest plantations, and urban environments, often defoliating thousands of trees in a single outbreak. More…

Hemlock Elongate Scale

Hemlock elongate scale pierces the underside of the needle with its mouthparts and removes fluids from the needle. Trees that are severely infested will exhibit needle yellowing or dropping, thinning canopy, and eventual death. More…

Hemlock Woolly Adelgid

Hemlock woolly adelgid (HWA) (Adelges tsugae Annand) is a deadly introduced pest of forest and ornamental hemlock trees in the eastern United States. More…

Holly Leafminer

Holly leaf miner damages a number of holly varieties by feeding between the upper and lower surface of the leaf tissue. More…

Honeylocust Plant Bug

Honeylocust plant bugs injure the tree by feeding on the sap, which results in distorted and deformed leaves. More…

Honeylocust Spider Mite

The honeylocust spider mite is a warm season mite that causes a bronzing discoloration on honeylocust trees by feeding on the underside of the leaf surface. More…

Japanese Beetle (Lawn)

The Japanese beetle spends much of its life in the soil underneath your lawn as a grub where it feeds on lawn roots. Where their numbers are large, turf grass can be killed. More…

Japanese Beetle (Tree)

Japanese beetles are skeletonizers, which mean they eat the “meat” of leaves, leaving only the veins behind. They also feed on both flowers and fruit. More…

Laurel Wilt

Laurel wilt is an invasive deadly vascular wilt disease of red bay and other trees in the Lauraceae family, caused by the fungus Raffaelea lauricola, which is carried by the recently-introduced ambrosia beetle (Xyleborus glabratus). More…

Lecanium Scale

Lecanium scale represents a group of common soft scales that infest a wide range of tree species. They attach themselves to the leaves and twigs of trees and shrubs and feed on the plant nutrients. More…

Magnolia Scale

These large, easily seen insects cause damage to trees by attaching themselves to the tree’s vascular system and feeding on the sap. They can kill entire branches, and weaken the tree. More…

Oak Anthracnose

Oak anthracnose is a foliar fungal disease, Apiognomonia quercina that causes darkened spots and lesions on infected leaves.  Although unsightly, anthracnose is rarely harmful to the tree’s health, however if infection is severe repeated defoliation can reduce the tree’s resources, … More…

Oak Decline

Oak decline may occur for a variety of reasons, as explained here.The process of decline can be slow, taking as long as five years.  Preventive methods to relieve major stress factors can help extend the life of these valuable trees. More…

Oak Wilt in Texas

Oak wilt is a vascular wilt disease caused by the fungus Ceratocystis fagacearum. This fungus grows in the water conducting vessels of the tree, which kills the tree. This topic discusses oak wilt in Texas. More…

Oak Wilt North

Oak wilt is a vascular wilt disease caused by the fungus Ceratocystis fagacearum. This fungus grows in the water conducting vessels of the tree, which kills the tree. More…

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