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

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

    5 5.68%
  • Scale

    25 28.41%
  • Mealy Bug

    23 26.14%
  • Aphids

    7 7.95%
  • Rodentia, ie Rats or Mice

    3 3.41%
  • Beetles that like to munchie munchie on your orchids

    3 3.41%
  • slugs, snails

    17 19.32%
  • Pollen Pinching visitors

    1 1.14%
  • Family pets

    3 3.41%
  • Yikes! I suddenly feel lucky!

    17 19.32%
  • I just commented

    4 4.55%
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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; Hello The orchids are sequestered in the food umbrella with sticky traps which many of ...

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  1. #51
    SusanLee is offline Member
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    Hello

    The orchids are sequestered in the food umbrella with sticky traps which many of the thrips get stuck on as well as a small dish of water where many drown, I also spray the ones I see flying around with a 50/50 mix of rubbing alcohol and water which seems to kill them quickly. I made the sticky traps out of colored plastic document holders cut into squares and covered with a thin layer of tanglefoot, both sides, then hung on a toothpick from the side of the pots. The thrips seem to be attracted mostly to the blue sticky traps but the yellow and pink ones also trap a few. While watering yesterday I saw many many larvae in the water. I tried the chlorine bleach mentioned in another post and siphoned out some of the thrashing larvae with some of the chlorine water. After leaving them in a small container for over an hour they were still moving around, so I will need to use a systemic insecticide for the larvae.

  2. #52
    SusanLee is offline Member
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    I realized after my last post about sequestering an orchid with thrips that by isolating it like that and preventing adult thrips from traveling around I had confined them to breeding in a single plant. Sure enough, the last time I watered (on Saturday) the water was thick with larvae thrashing around. Given the deadly effect of rubbing alcohol on adults, as an experiment I sprayed the top of the water with a 50/50 mix of rubbing alcohol and water and the larvae were killed almost instantly. Because of the great number of larvae, last night I soaked, for 2 minutes, the orchid pot in the same type of mix. All visible (under a loupe) larvae were killed. The orchid was then flushed with warm water to counteract the cooling effect of the rubbing alcohol. I realize this is a stark departure from the norm and even though it killed the thrips only time will tell if the orchid itself was damaged. I am hoping it was not.

  3. #53
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    78Terp is offline An Avant Gardner
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    Quote Originally Posted by SusanLee View Post
    I realized after my last post about sequestering an orchid with thrips that by isolating it like that and preventing adult thrips from traveling around I had confined them to breeding in a single plant. Sure enough, the last time I watered (on Saturday) the water was thick with larvae thrashing around. Given the deadly effect of rubbing alcohol on adults, as an experiment I sprayed the top of the water with a 50/50 mix of rubbing alcohol and water and the larvae were killed almost instantly. Because of the great number of larvae, last night I soaked, for 2 minutes, the orchid pot in the same type of mix. All visible (under a loupe) larvae were killed. The orchid was then flushed with warm water to counteract the cooling effect of the rubbing alcohol. I realize this is a stark departure from the norm and even though it killed the thrips only time will tell if the orchid itself was damaged. I am hoping it was not.
    Good luck! Do keep us posted to how it turns out. I certainly would like to know if they can survive that treatment!

  4. #54
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    Harvey,
    I don't know why im so unlucky with thrips but i found few on some of my plants. So the ones that are home im treating with Sriram's sugestion and that does work.
    Yesterday i was watering two at work (milt and cycnoches). And found few thrips on cychnoches only. Since i did not have neem oil mix at work and i wamted treat it right away i spraied both with 99.9% isopropanol ( atleast few advantage of working in lab). So thrips that was moving before was dead at once ( at least they did not move at pocking). I tried to drain media too with 50% solution butbit in moss so i dont know how successful medium treatment is.
    I did not see any on milt though. That makes me wonder if thrips prefer one plant's variety to another.
    Posted via Mobile Device

  5. #55
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    I don't know if I have thrips. So far I think not. But am always on the lookout for good knowledge to cram into the back of the brain for future use. I will have to google them soon and at least see what they look like.

  6. #56
    ksriramkumar is offline Senior Member
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    What I have noticed. Thrips, aphids, mites certainly have preferred plants

    Thrips --> I found on a few dendrobiums one season but other orchids nearby were not affected at all.
    Aphids --> I found Dendrobium formosum to be heavily infested during blooming season but near by plants were alright.
    Mites --> I find it going after Catasetum,Gramattophyllum and Thunia. My poor Thunia did not bloom this year because of the repeated mite infestation.

    Quote Originally Posted by chemist View Post
    Harvey,
    I don't know why im so unlucky with thrips but i found few on some of my plants. So the ones that are home im treating with Sriram's sugestion and that does work.
    Yesterday i was watering two at work (milt and cycnoches). And found few thrips on cychnoches only. Since i did not have neem oil mix at work and i wamted treat it right away i spraied both with 99.9% isopropanol ( atleast few advantage of working in lab). So thrips that was moving before was dead at once ( at least they did not move at pocking). I tried to drain media too with 50% solution butbit in moss so i dont know how successful medium treatment is.
    I did not see any on milt though. That makes me wonder if thrips prefer one plant's variety to another.
    Posted via Mobile Device

  7. #57
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    will do. It's likely going to take some time but I am watching them closely. Its amazing how addictive these plants and their care can be! I still have a lot to learn but am ever hopeful.

  8. #58
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    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?

  9. #59
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    Thrips have become a problem in UK in the last year. After studying their life cycle I realised that the only way to get rid of them is soil drenches with an appropriate insecticide as well as ordinary leaf and flower spraying, since they spend some months in the compost undergoing metamorphosis from the larval stage to the flying, mating, laying egg stage. The products designed for kiling vine weevils seem to work, but I found that when used three times in the year, my plants started producing miniature flowers - they grow out of it in a year, but it does limit the amount of times they can be used. Fortunately, after a year of spraying usually twice a month plus those three drenches, I seem to be clear - fingers crossed. ( but I spent more on chemicals than on plants ! ) And by the way the biologic controls for these things only work with specific kinds of thrips , not the kind we have .

  10. #60
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    Hi Chemist
    I used the bleach solution (2 tbls) per gallon and found that it did not kill thrips. While soaking the most heavily infested orchid, pot and all, in that solution I noticed many aggregations of thrip larvae at the top so I suctioned some out with an eye dropper along with some of the bleach solution and put the lot in a small container. After an hour or longer they were still alive. I had been spraying any adult thrips that I saw (see earlier post about sequestering and being able to see them) with a dilute solution of 70% isopropyl (50/50 water/isopropyl) with almost instant death of the adult. So next time the orchids were watered it was with a short soak of that solution. And it was instant death for all of the larvae that I saw. Once I drained the orchids I flushed them with warm water hoping to counteract the chilling effect of the alcohol. From what I have read that dilution of rubbing alchohol is not harmful to orchids but a stronger solution might be. Hope they're right!

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