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Imidacloprid on Oxyglossum Dendrobiums and Pleurothallids

Discussion in 'Issues, Disease and Pests' started by Raven, Jan 14, 2021.

  1. Raven

    Raven Well-Known Member

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    Hello folks,

    I want to spray My Oxyglossum Dendrobiums and Masdevallias with a systemic insecticide and I have two options, orthene, and imidacloprid. I read that imidacloprid should be applied to cattleyas only, no dendrobiums and no thin-leaved orchids. Does anybody have experience using it on Dendrobiums and Pleurothallids?
     
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  2. Ray

    Ray Orchid Iconoclast Supporting Member

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    The recommendation of "no dendrobiums and no thin-leaved orchids" is more commonly applied to copper treatments. I have used both acephate (Orthene) and imidacloprid (Merit) on all of my plants - including dendrobiums and pleurothallids - with no issues whatsoever.
     
  3. KellyW

    KellyW Orchid wonk Staff Member Supporting Member

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    I have used Imidacloprid (Bayer Advanced Rose and Flower Care) on all of my orchids including Dendrobiums. I don’t have many oxyglossums but lots of warm growers. I have never had a problem.
     
  4. Raven

    Raven Well-Known Member

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    Thank you, Ray and Kelly
     
  5. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I rotate imidacloprid and Safari for systemic insecticide. I have a very mixed collection including lots of pleurthallids and dendrobiums (including lots of oxyglossum) and have no problems.
     
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  6. Chuck-NH

    Chuck-NH Well-Known Member

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    I have rarely had any issues with anything including those mentioned above on Pleurothallids or Dendrobiums.

    Regarding copper based sprays (like the Phyton 27), I have experimented with “oxyglossums” and have seen no phytotoxic affects, however, a little overspray hit plants like lawesii and victoria-reginae and I saw leaf spotting within a day. I would still be very cautious about using it, but I did save a compot of cuthbertsonii from what I believe was systemic bacterial rot by using the Phyton 27.
     
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  7. Raven

    Raven Well-Known Member

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    Interesting observation. I don't think I have ever seen a systemic bacterial rot of Dendrobium. Do you by chance have a picture of that compot?