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What is this? On underside of leaf | Monstera Maniacs | Planta community

Meghan

What is this? On underside of leaf

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3 comments

  1. KaityRich

    Looks like rust fungus.

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  2. 9s

    Seconding rust. Common when there’s too much humidity in the area or the leaf got wet. You can use copper fungicide to treat it.

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    • Meghan

      Thank you!!

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