White Spots on Gum Tree: Likely Harmless, But Check for Scale Insects

White Spots on Sweetgum? Probably Nothing Serious

If your tree is a sweetgum (Liquidambar), white spots on bark/leaves are usually benign — lichens, benign fungi, or natural bark exfoliation.

If It's Another Tree — Do This Test

• Scrape a spot with fingernail.
• Comes off, squashes with liquid inside = scale insect.
• Powdery, doesn't squash = fungal spores or mineral deposit.

Next Steps

• If scale: treat with horticultural oil or systemic (imidacloprid).
• If fungal/powdery: usually cosmetic, no treatment.
• Reply with tree ID and spot details for precise advice.

Sweetgum? Relax. Other tree? Squash a spot and report back.