Southern Pine Beetle: Atlanta Diagnosis & Treatment Guide

What Is Southern Pine Beetle?

The southern pine beetle (Dendroctonus frontalis) is a small native bark beetle, only about the size of a grain of rice, that bores into pine trees and feeds on the vascular tissue just under the bark. Adults tunnel in to lay eggs and introduce a blue stain fungus that clogs the tree's water conducting tissue, which is what ultimately kills the tree.

How to Recognize It

• Pine needles in the canopy fading from green to yellow to red to brown, sometimes within a few weeks.
• Fresh green needles or yellowing needles dropping to the ground under an otherwise healthy looking pine.
• Popcorn shaped pitch tubes, roughly the size of a pencil eraser or a dime, white to yellow in color, usually tucked into the crevices between bark plates.
• Winding S-shaped galleries packed with brown frass (boring dust) under the bark on dead or dying trees.
• Multiple nearby pines dying in a cluster or expanding spot, since the beetles move from tree to tree.
• On drought stressed trees, pitch tubes may be absent and the tree simply declines quickly.

Beetles are active during the warm months, with attacks typically intensifying from late spring through summer and into early fall. If you notice a pine fading rapidly during this window, it is worth a close look.

Why It Matters for Atlanta Trees

The southern pine beetle is one of the most destructive forest insects in the Southeast and can kill a mature pine in a matter of weeks, then move into neighboring pines. Outbreaks across Georgia have been rising sharply, with over 1,600 documented spots statewide in 2024, and metro Atlanta counties (including Paulding) have been flagged as high probability areas for new spots. In local landscapes the beetles most often attack loblolly, shortleaf, and Virginia pines, and occasionally white pine and other native or ornamental pines. Once beetles are inside the trunk there is no effective chemical rescue, and dead pines lose structural integrity quickly, becoming a real safety hazard to people, homes, vehicles, and power lines.

General Prevention

• Keep pines healthy and unstressed: water deeply during prolonged drought and mulch around the root zone to protect roots and bark from mowers and string trimmers.
• Avoid wounding the trunk or roots from construction, vehicles, or climbing spikes, since fresh wounds attract bark beetles.
• Schedule any pine pruning for the dormant months (roughly November through February) when beetles are inactive, and delay pruning during a known local outbreak.
• Promptly remove lightning struck, severely damaged, or already declining pines before they become a beetle nursery for the rest of your trees.

What NOT to Do

• Do not self-diagnose. Many tree problems look alike, and treating the wrong one wastes time and can harm the tree.
• Do not apply fungicides, insecticides, or other chemicals without an arborist's specific recommendation. Wrong product or wrong timing makes things worse, and once beetles are inside the trunk no spray will reach them.
• Do not delay action on a confirmed infestation or leave a beetle killed pine standing near the house. Spots expand quickly into neighboring pines, and dead trunks become unstable in a matter of weeks.

Related Services

For most diagnosis and treatment questions, the right starting point is one of our services:

• ISA-Certified Arborist Services: diagnosis, consultation, second opinion
• Plant Health Care (PHC): ongoing tree health management
• TRAQ Tree Risk Assessment: when the tree may be a safety hazard

Sources

This page summarizes general information from: UGA Cooperative Extension (Paulding County), UGA Warnell School of Forestry and Natural Resources, and Georgia Forestry Commission.