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Apple Burr Knot: Disease with No Home Cure

Burr knot (genetic/environmental) creates root initials on trunk, weakening tree and inviting dogwood borers. No homeowner treatment. Consult UGA Extension pathologist Elizabeth Little.

apple burr knot

About Gardening: Bicolored Royal Gala Apples: A Rare Natural Mutation; Diagnosing Apple Tree Fruit and Leaf Problems; Reviving a Wild Apple Tree: Pruning and Care Guide; Honeycrisp Apple Seeds: Not GMO, Will Grow Normally; Apple Pollination Mismatch: Add a Crabapple; Cotton Burr Compost: Why It's Not in Georgia Garden Centers; Cedar Apple Rust: Those Orange Gobs on Your Red Cedar; Woolly Apple Aphid: Root and Bark Feeder Requiring Dual Treatment; Growing Apple Trees from Seed: Requires Cold Stratification; Finding a 'Jonathan Red' Dwarf Apple Tree: Local and Mail-Order Sources

Garden Articles

Calcium Chloride vs. Chelated Calcium for Apple Fruit Quality and Size

Apple Tree Bark Separating from Trunk: Tree Dead or Dying—Check for Borers, Fire Blight, Contact Extension

Apple Tree Decline: Fewer Blossoms, Wilted Leaves

Crab Apple White Fluffy Growth: Scale or Powdery Mildew?

Cedar-Apple Rust: Life Cycle, Apple Impact, and Fungicide Control

Large Knot on Tree: Crown Gall or Callous Tissue?

When to Fertilize Apple Trees: Soil Testing Over Guesswork

Plants

Why Apple Trees Fail to Fruit: Nitrogen, Weeds, Frost, and Pollinators

Transplanting Apple Seedlings from Water to Soil

Caring for Year-Old Apple Seedlings Grown Indoors

Growing Apple Trees from Seed in a Tropical Climate

Why Your Apple Seedling Isn't Growing Taller: Light, Pot Size, and Fertilizer

Growing Apples in Ghana: Chill Requirements and Seed Reality

Diagnosing a Century-Old Apple Tree's Decline