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  • 1 Post By Azizan
  • 1 Post By ksriramkumar

Undersides of leaves turning brown. Help!

This is a discussion on Undersides of leaves turning brown. Help! within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have 2 orchids with this problem. I ran a paper towel across thinking it ...

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  1. #1
    629miller's Avatar
    629miller is offline Member
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    Default Undersides of leaves turning brown. Help!

    I have 2 orchids with this problem. I ran a paper towel across thinking it might be mites, but got no discoloration. New growth seems fine.Name:  IMG_0589_1_1.JPG
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  2. #2
    Azizan is offline Senior Member
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    Did you use dry paper towel? Because I think spider mites will not stick to dry paper towel no matter how hard you rub it off. Before other people help you diagnose it, it is best to keep it away from other plants. Quarantine it in different room would be the first step.

  3. #3
    Chris in Hamilton's Avatar
    Chris in Hamilton is offline Senior Member
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    Are the plants genus related?

  4. #4
    ksriramkumar is offline Senior Member
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    Was it exposed to cold recently?. if it is not spreading, I would leave it as is.

  5. #5
    629miller's Avatar
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    I used a wet paper towel. No they have not been exposed to cold and it IS spreading. Now I have 3 in isolation. I think they are all oncidiums. All thin leaved orchids.

  6. #6
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    Zainal Abidin Bin Othman
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    I think to be on the safe side better you cut the lesion , isolate them treat with fungicide.

  7. #7
    Chris in Hamilton's Avatar
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    I would agree with Zainal. Treat it with a fungicide. Garden sulphur/sulpher is good and will kill mites as well if that is the problem.

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