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  • 1 Post By fxxy
  • 2 Post By cakedaddy
  • 2 Post By catasetum-ian

spider mites

This is a discussion on spider mites within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I think i got them!!!! Extremely (almost microscopic) small critters, reddish color. Also a silvery ...

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  1. #1
    fxxy is offline Junior Member
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    Default spider mites

    I think i got them!!!! Extremely (almost microscopic) small critters, reddish color. Also a silvery sheen on leaves. What is best treatment????? I tried a hammer to each one, but it is really time consuming and screws up the foliage.... Where do these critters come from???? New plants????? Anybody know?????

  2. #2
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    Well, first of all, they come from Hell. No really...they generally come in as hitchhikers on other plants and can go for a very long time unnoticed until conditions are right for their population to explode. I have tried spraying rubbing alcohol and insecticidal soap to control them. They work to some extent. You just have to stay on top of the game and spray at regular intervals. That being said, my plant didn't make it. Once the population is large enough, it is often better to toss the plant considering the amount of money and effort one might spend to eradicate them. My problem was confined to one relatively inexpensive plant . A better approach would be to keep up humidity and avoid excessively high temps. Spot check susceptible plants and treat before they go crazy.
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  3. #3
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    you can try one of these methods
    1. spray with water directly under the leaves 'will dislodge most of them away)...do it multiple times
    2. neem oil
    3. my favorite ...organophosphate (some will not agree with this but works the best for me)....malathion, dichlorvos, amitraz
    4. alcohol swab...time consuming
    5.i had been told to use garlic brew but i personally haven't try it out
    6. i have tried individual hammering ...to newly acquire plants but it is easier to just slide the leaves between your two fingers, will crush and dislodge most of them ...but if you are dealing with large amount of infected plant....still time consuming

    i included a link here, there is a biological control of the mites also it did mention they might arise from infected soil area, but most of my mites problem arises from newly acquire plant.
    http://apps.rhs.org.uk/advicesearch/...e.aspx?PID=190
    lucky for me, i collect catasetums, so either i try getting a dormant plant, bulb divisions or sometimes i trimmed the leaves of the new plant if i see any spots underneath the leaves regardless it is moving or not

  4. #4
    catasetum-ian's Avatar
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    slight correction,,,
    the amitraz is not under the organophosphate group.

  5. #5
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    There are several good insecticides out there for treatment. I think the easiest remedy (after you gain control) is humidity. High humidity (for the most part) = no spider mites

  6. #6
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    You should increase humidity around this plant. The spider mites will not do well and your orchid will love it.

    cheers,
    BD

  7. #7
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    A product that is just an insecticide will not work on mites as they are not insects. Make sure it is a miticide as well. In the past I've used a product called Trounce. Application has to be repeated once a week over the course of several weeks to get all the successive generations of hatchlings.

    And a Bruce said, increasing your humidity is a must. I've learned the hard way that mites love it dry.

  8. #8
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    If I were you, I would spray very spicy red-pepper juice or lemonade(no sugar) on them alternately.

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    Quote Originally Posted by eee View Post
    If I were you, I would spray very spicy red-pepper juice or lemonade(no sugar) on them alternately.
    Wow very interesting idea, thanks.

  10. #10
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    In England it used to be said that Boots Fruit Tree spray was the best for this pest ( what a funny language is English - "best" actually means worst for the pest ! ). Boots by the way is the largest chain of what we call Chemists or Pharmacists , and maybe you call them drug stores -place we go to get the Doctors prescription made up - or am I getting tied up in language again... Winston Churchill said the Brits and the Americans were divided by a common language,,,

    But with a small collection undoubtedly the best way is not spraying at all ; it is actually cleaning the leaves. It requires two balls of cotton wool, dipped in warm soapy water ( or in a mixture of insecticide if you wish - but these things are not insects they are mites , and most insecticides don't work ; but Physan - read the label for the concentration - is VERY good . Dip the cotton wool in the solution, ,put one lump above the leaf and one below, and hold them together between finger and thumb ; hold the leaf with the other hand and slide the cotton wool along the entire length of the leaf. Repeat on all leaves. You will find that the cotton wool gets dirty and stains red - that red stain is all the critturs...

    The best odontoglossum nursery in the world -- they closed 25 years ago and I won't mention names, continued growing using 19th century methods until they closed towards the end of the 20th century ( why do you think they closed ? ) and they used to do this wiping trick with every leaf of every plant, every winter ( not only Odonts of course ). What magnificent clean perfect plants they grew !

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