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Dark spots on my Catts?!

This is a discussion on Dark spots on my Catts?! within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; This terrible thing has happened over the last 2 days. Three of my Catt's have ...

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  1. #1
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    Unhappy Dark spots on my Catts?!

    This terrible thing has happened over the last 2 days. Three of my Catt's have developed some weird spots under the leaves and it looks like something bad. There are other Catt's right next to them that are not affected by this at all only this three...Can anybody please tell me what this could be? It is so upsetting to see it happen to a perfectly healthy plants. I think I I'm gone cry if it stars spreading on others. Please help if you can!

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    Ania,

    Spray with a good fungicide. Catts (whose growths and leaves can last for years) are going to show these signs of aging as they mature, much as people develop lines and wrinkles. If you look at the folliage of superb, award-winning plants, you will notice the same kind of spotting and blotching. I suppose this kind of thing is preventable if you grow your plants in some kind of antiseptic bubble, but that's pretty unrealistic. The foliage of most plants in the wild looks absolutely horrendous, and as a general rule, orchids are not grown for the appearance of their folliage.

    Spots like these are typically fungus-related: get yourself any kind of "disease-control" stuff that's formulated for ornamentals from your local box store, mix according to directions, and spray once every month to month-and-a-half. That will help prevent this kind of blotching from cropping up.

    (Your plant is fine....)

  3. #3
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    Louis,

    Thank you for your reassurance. These are plants that I've had for many years, and they survived mealy bugs, scales and 3 moves! I don't want to loose them now! What is interesting, the newest leaves are not affected. That makes sense now according to what you just told me. I have physan in my "medicine cabinet" will it be sufficient?

    A

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    Hi Ania,

    Physan 20 should do the trick. The Physan Website has good directions for the dosage, given your application. PM for the link.

    It's worth mentioning that a fungal infection can be opportunistic and set in after the plant is damaged in some other way. I had problems with this, in all of that high heat we had in the beginning of August. The high temps caused cell collapse on the leaves of some of my Paphs. These then developed a fungal infection that went through the leaves with alarming speed. So now when I see any kind of cell collapse on the leaves, I spray every week to two, to prevent any fungal nastiness from taking hold.

    McJulie

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