Mango Tree Black Spots on Branches: Check for Scale

Mango flowers die yearly; weekly mancozeb doesn't help. Black spots on branches.

Diagnosis Step

Scrape spots with fingernail: if they come off with liquid inside = scale insects. Scale causes flower/fruit failure.

Send close-up photo or report scraping result for specific control recommendation.

Plant Diseases: Black Spots on Sugar Maple Trunk: Borers or Bleeding Canker?; Black Spots on Japanese Maple Bark: Likely Harmless Lichens; Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine; Maple Leaf Galls: Insect-Caused Bumps on Autumn Blaze Maple; Oak Tree Black Spots on Trunk: Need Photos for Canker ID; Oak Tree Black Bumps on Limbs: Scale Insects; Yucca Leaf Spots: Cosmetic Fungus, Not Fatal; Black Spot on Large Trees: Rake Leaves, Don't Worry; Rubber Tree Black Spots: Sunburn, Not Fungus; Hibiscus Black Spot: Fungal Disease Treatment

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