Pine Tree Borer Infestation: Signs, Assessment, and When to Remove

90% needle browning from top down + small holes + audible boring = severe bark beetle/borer attack. At 30 years and 60 feet, this tree is likely beyond saving.

Why Treatment Fails

• Borers are inside—sprays don’t reach them.
• Systemic insecticides (e.g., emamectin benzoate) work preventively, not curatively at this stage.
• Tree’s vascular system is compromised; it can’t transport water/nutrients.

Immediate Steps

1. Hire a certified arborist for hazard assessment—dead pines become dangerous.
2. Remove promptly to protect nearby trees (borers spread).
3. Debark/chip/burn infested wood to kill larvae.
4. Monitor remaining pines for pitch tubes, frass, fading crowns.

Prevention for Others

Deep water during drought; avoid wounding; consider preventive systemic injection for high-value trees.

Allexperts Tree Expert Jim Hyland (Forestry Service) can provide species-specific advice via the Trees forum.