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Tree and Shrub Pests

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Updated: March 13, 2026

Crapemyrtle Bark Scale in Home Gardens

Learn how to identify and manage crapemyrtle bark scale insects.
a branch covered in crapemyrtle bark scale
Updated: June 12, 2025

Beech Leaf Disease in Maryland

A new disease is affecting all types of beech trees in the northeastern United States. Symptoms of Beech Leaf Disease include dark bands on leaves, yellowing and distorted leaves. Maryland residents should report symptoms to the Maryland Department of Agriculture's Forest Pest Management division.
darker green stripes on beech leaves
Updated: March 20, 2026

Box Tree Moth

Be on the lookout for a new pest of boxwoods. Box tree moth caterpillars chew the leaves of boxwood plants and can cause complete defoliation. Boxwoods are their only host plant. This pest has been found in several US states, and was first detected in Maryland in July 2025. If you find it, please report it to us.
a white moth and a green caterpillar on a boxwood branch
Updated: March 13, 2026

Mites in Home Gardens

A variety of mites occur in home gardens. Learn about their life cycle and how to identify and manage pest mite species.
Magnification of twospotted spider mites on leaf
Updated: March 13, 2026

Aphids in Home Gardens

Learn how to identify and manage aphids on indoor and outdoor plants.
Adult Pea Aphid with two juveniles on a flower petal.
Updated: March 13, 2026

Armored Scale Insects on Trees and Shrubs

Learn how to identify and manage several species of armored scale insects.
oystershell scale
Updated: March 13, 2026

Soft Scale Insects on Trees and Shrubs

Learn to identify common soft scale insect species and explore their life cycle profiles.
closeup of European Fruit Lecanium Scale on twig
Updated: March 13, 2026

Euonymus Scale

Learn how to identify and manage euonymus scale insects.
euonymus scale
Updated: March 13, 2026

Introduction to Scale Insects

Learn about how scale insects are classified and how they feed, and how to effectively manage populations that cause plant damage.
oystershell scale
Updated: March 12, 2026

Leafminers on Ornamental Plants

Leafminers feed between the upper and lower surfaces of a leaf.
brown puckered leaves of boxwood from leafminer insect damage