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Spider Mite

This is a discussion on Spider Mite within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have searched the forum for a while and not found much about spider mite. ...

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  1. #1
    Awkward Orchid's Avatar
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    Default Spider Mite

    I have searched the forum for a while and not found much about spider mite. Does this web look like spider mite to you???

    Name:  Spidermite.jpg
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    Name:  Spidermite maybe.jpg
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    I bought the Bifrennaria online about 6 weeks ago and the web appeared a couple of days later. Guessing the perpetrator/s came with the plant. Attaching 2 photos as the web is hard to see.

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    Default

    I'd say it's definitely mites, but cannot ID the type.

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    I just discovered this same thing only yesterday on three of my tender perennials that I bring in the house for the winter. They were not looking good then I found the webbing all over them with tiny white dots on the web which are the mites. I have never seen them before and now I am worried about it.

    Spider mites have the thin webbing like a spider web. They will kill your plant. I sprayed mine with a 50/50 alcohol/water mixture that also has a dash of dish soap in it. After a few minutes I then sprayed them with a strong stream of water. Right now they are back outside away from the other house plants but I am inspecting everything else closely. They can be hard to get rid of once they get started from what I understand.

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    Aaarrghh! I have seen tiny cream/white dots so I assume that is the mite. The media is a mix of quartz pebbles and cork, so I can probably submerge the whole plant. When I reported it there was a significant amount of web amongst the upper roots. This could make spraying ineffective. Does anyone know if alcohol/water mix would harm the roots?

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    Mites have been a significant issue this year, for folks with relatively warm, dry conditions - I've had at least a half dozen inquiries about treatments, when I normally get none!

    For some reason, commercial miticides tend to be pretty pricey. There is a product - Sucrashield - that dissolves the protective layers on soft-bodied insects and mites of all developmental stages, so that may be worth considering.

  6. #6
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    Thanks ray ark, I will see if I can find some down here. In the meantime I have covered it in alcohol with a pastry brush, next day I sprayed it with hairspray let it dry then submerged the plant up to the p'bulbs in soapy water and let it sit for 15 minutes, then drained and watered it all over with lots of filtered water. Let's see what happens...

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    How did things work out with your mite problem Leah?

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    It wasn't spider mite Chris, but I killed the Bif. through too much watering. Well,
    I think it is dead, but I have it sitting on damp sphagnum moss with no roots and praying for a miracle.

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    As long as the pseudo bulbs are still green or greenish yellow there is still hope. Myself, I would take it off the sphagnum, stand it in the smallest clay pot that will keep it stable with no medium, place it in coolest spot I can find with good light but no sun, apply some rooting hormone or kelp extract and give it a light misting every morning. Its spring in Australia so you hopefully should start seeing results within a few weeks.

  10. #10
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    If mites are, the photo is too small and you can not see, the more common the Tetranychus urticae, are not easy to eradicate due to their incredible proliferation and their presence on plants is not always obvious, if not after careful research, useful a microscope or a powerful lens, their presence at the advanced stage is highlighted by white spots on the leaves and small cobwebs, when these symptoms are evident need to act quickly or take the plant to death, infesting whole greenhouse.
    In my botanical consultant experience I've had many experiences with these mites, effective results is to make treatments with two products mixed an ovicidal and an acaricide;
    - Ovicidal, the "Borneo", produced by Bayer, 9 ml dose x liter;
    - Acaricide, the "VERTIMEC® EC", produced by Syngenta, the active ingredient Abamectin 1.84%, dose 1 ml per liter, can be mixed;
    these are truly effective products against mites, but you have to apply three at 20-25 days after treatment, it is advisable to not only treat the affected plants, but whole greenhouse.

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