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 Botanic Garden >> Gardening >  >> Question and Answer >> Plant Diseases

Japanese Maple Yellow Spots: Possible Spray Burn or Heat Stress

Bloodgood Japanese Maple with Yellow/Gold Leaf Spots After 6 Weeks

Leaves show yellow/gold spots. Nursery suggests water droplets + 90°F sun = burn. Owner sprayed Spectracide Triazicide (hose-end) month ago.

Assessment

  • Water droplets can act as lenses, causing burn.
  • Triazicide + sun may have contributed phytotoxicity.
  • If tree not wilted and new growth looks clean, it’s cosmetic.

Recommendation

Wait 2 weeks. If new growth emerges clean, no action needed. Avoid spraying in hot sun. Water at soil level.

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