Identifying and Treating Gall-Forming Mites on Swamp Cypress

Misdiagnosed Pest Problem

A swamp cypress in Baton Rouge developed round, chalky white clumps on needle tips. Initially identified as bagworms, the pest was later confirmed as a gall-forming mite after photo review.

Symptoms and Lifecycle

The galls start firm with tiny round structures, then darken and become spongy and brown with age. No silk, sticks, or debris are present, distinguishing them from bagworm cases.

Effective Control Measures

• Spray the tree with a miticide now and again in spring.
• Prune out existing galls to reduce mite populations.
• Monitor for reinfestation and maintain tree vigor with proper watering and fertilization.

Early intervention prevents spread and preserves the tree's health and appearance.