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View Poll Results: To date, what pest has been the most devestating?

89. You may not vote on this poll
  • Psychotic Kitty-Cats

    5 5.62%
  • Scale

    25 28.09%
  • Mealy Bug

    23 25.84%
  • Aphids

    7 7.87%
  • Rodentia, ie Rats or Mice

    3 3.37%
  • Beetles that like to munchie munchie on your orchids

    3 3.37%
  • slugs, snails

    17 19.10%
  • Pollen Pinching visitors

    1 1.12%
  • Family pets

    3 3.37%
  • Yikes! I suddenly feel lucky!

    18 20.22%
  • I just commented

    4 4.49%
Multiple Choice Poll.
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Results 71 to 73 of 73
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Pests in your orchids???

This is a discussion on Pests in your orchids??? within the General Orchid Culture forums, part of the Orchid Culture category; Alcohol to kill thrips ? An interesting idea. In UK we don't have "rubbing alcohol" ...

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  1. #71
    Dorsetman's Avatar
    Dorsetman is offline Senior Member
    Real Name
    Geoff Hands
    My Grow Area
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    Cattleya ?
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    Oct 2010
    England, South coast.
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    Alcohol to kill thrips ? An interesting idea. In UK we don't have "rubbing alcohol" available ; the stuff sold by ironmongers and at pharmacies is methylated spirits, which is a methyl alcohol mixture - with water i assume - and with a colouring agent to identify it. I Have used it as a spot treatment for pests, and have been told it is OK like that for hard thick tough leaved plants ( Vanda, Cattleya...) but would cause cells to burst with thin leaved plants - ( Odontoglossum etc). So I normally dilute it 50:50 with water. Of course if I am removing scale or mealy bug for example,thye physical removal with a wetted cotton wool ball, or a stiff p;aint brush is sufficient to kill the things anyway, so I don't really know how efficient the alcohol is.
    But thrips - I have hardly ever seen one, but the damage in the form of a bulls eye ring around the puncture is plain to see. With cymbidiums, holding the leaf up to the light shows them, with odontoglossums ( those are the only two categories where i have been troubled ) the damage remains as a black mark surrounding each leaf puncture , and with a lot of punctures the leaf is blackened.

  2. #72
    phraggy's Avatar
    phraggy is offline Senior Member
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    Nov 2012
    Lancs. England. UK
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    Quote Originally Posted by chemist View Post
    Ed, in earlier post you said 5% bleach, but later on suggested 2 tbls per gallon which will be less than 1% bleach. Did you use both solution or only later one?!
    Do you think it will work on thrips?
    Sorry I'm late in replying to your post. The solution I use is called Domestos in the UK and is listed as a 5% solution. I only mentioned 2tbls per gallon because this will kill scale and mealies. I have no doubt that if you double this ( which I mistakenly did) on a few cattleyas a few months ago you will not cause any harm to the plants but it will sure shift the bugs. I have never been bothered by thrips as long as I can remember!!!


  3. #73
    SusanLee is offline Member
    My Grow Area
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    Phalaenopsis for now
    Join Date
    Aug 2015
    Renton, WA
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    actually what I thought were thrips turned out to be fungus gnats. The alcohol kills them, too. Thanks for the description of thrip damage. Hope I never have them (I was quite stressed thinking the fungus gnats were thrips) but will remember your description.

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