Pine Trees Browning While Neighbors Stay Green: Site-Specific Stress

Three pines dying amid healthy neighbors points to localized factors—not a regional epidemic.

Investigation Checklist

1. Trunk and root flare: Check for mower/string trimmer damage, girdling roots, resin flow (pitch tubes = bark beetles)
2. Lightning strike: Vertical bark streaks, spiral cracking, sudden onset
3. Root zone: Recent excavation, grade change, compaction, herbicide exposure
4. Species match: Are all three the same species? Different pines have different susceptibilities
5. Needle pattern: Interior needle drop = normal; entire branches = serious

Common Pine Killers

• Pine wilt nematode (sudden, total browning)
• Bark beetles (pitch tubes, sawdust, gradual fade)
• Diplodia tip blight (stunted, brown new growth)
• Root rot (Phytophthora—wet sites, gradual decline)

Next Steps

If one tree is already dead, remove it promptly to reduce beetle/nematode spread. Have an arborist evaluate the others. Deep watering during drought and mulching may help if stress is environmental. Don't fertilize declining trees.