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  • 1 Post By raybark

Phal leaf ailment treatment and prevention

This is a discussion on Phal leaf ailment treatment and prevention within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have been having two different problems on some of my phals. One is yellow ...

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  1. #1
    moniluhum is offline Senior Member
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    Default Phal leaf ailment treatment and prevention

    I have been having two different problems on some of my phals.Name:  Ailment - 1.jpg
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Size:  393.4 KB One is yellow discoloration and Name:  Ailment - 1 (1).jpg
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Size:  357.4 KB two is what looks give indentation.

    Can I please get recommendations on what I should to treat each type also what are some ways of preventing before it appears.

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    raybark is online now Senior Member
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    The second one is mechanical damage - something has been eating it. Insects? Mice?

    The first one looks to me to be ravaged by mealy bugs or scale. Look at the leaf, right where it's cut off by the edge of the photo. I'll bet the underside of that leaf is heavily populated. Time for the "big guns" like acephate, a systemic insecticide.

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    ksriramkumar is online now Senior Member
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    1st one is certainly a pest (mites/mealies). Lack of chlorophyll seem to indicate mites. check the underside and can go for a systemic treatment. 2nd one could be a cold water damage or could be a mechanical damage. you can leave it as if the circle does not enlarge. no harm if you sprinkle a bit of cinnamon powder on the crater.

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    moniluhum is offline Senior Member
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    I removed the leaves from the plant in the first picture. Now I would like to treat so the best choice is acephate?? I would use it only when I see it on the leaves affected? How about prevention? Help me please. I read last night about viruses and was so depressed because I thought I had to trash several of my phals. I would like to do everything I can to avoid that feeling again.

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    One should never use a pesticide as a preventive measure, as that's a great way to help breed resistant insect strains.

    Acephate is an excellent systemic insecticide. It should be applied three times at one-week intervals, wetting all plant surfaces and saturating the potting medium each time.

    If you grow outdoors, you're at the whims of nature. If you grow inside or in an enclosure like a greenhouse, you should make sure all openings are screened, and may find that a double door (like an air-lock) helps. Also, be sure to quarantine ANY new plant for several weeks before introducing it to the rest of your collection.

    In addition to those measures, I have begin regular use of BotaniGard ES, which establishes a colony of the fungus Beauveria bassiana. That fungus infects eggs and larvae of many insects, so can keep the interlopers under control. The stuff is pretty pricey, but it's safe for the plants, environment, and me, and seems to be helping a lot.

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    ksriramkumar is online now Senior Member
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    I would not have removed the leaves but treat the leaf. removing leaves is going to create a opening for additional infection. You should use it only as a reactive measure. You could use neem oil based products which work by suffocating the pest which no pest can build resistance for.

    Quote Originally Posted by moniluhum View Post
    I removed the leaves from the plant in the first picture. Now I would like to treat so the best choice is acephate?? I would use it only when I see it on the leaves affected? How about prevention? Help me please. I read last night about viruses and was so depressed because I thought I had to trash several of my phals. I would like to do everything I can to avoid that feeling again.

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