Insect & Disease
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There are various species of wasps that may infest oak trees, but two common species include the horned oak gall wasp (Callirhytis cornigera) and the gouty oak gall wasp (Callirhytis quercuspunctata). These pests cause galls, or abnormal plant growths, found on foliage and twigs.

Bagworms are destructive pests of shrubs and woody ornamentals that are native to North America. Their spindle-shaped protective bags made from silk, debris and foliage provide camouflage, so they go unnoticed until there is significant plant damage.

The Black Turpentine Beetle is a common pest that affects pine trees throughout the United States.

Pine tip and pine shoot moths are the caterpillars of moths that attack conifer trees, causing a drought-like appearance to the tree.