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Avid or Imidacloprid (or both) for Thrips

Discussion in 'Issues, Disease and Pests' started by judypots, Oct 3, 2018.

  1. judypots

    judypots New Member

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    Hi all,
    I have orchids and African violets living together in harmony in my sunroom. I recently noticed a few thrips on some of the violets. I've started treating them with Bayer Tree and Shrub (Imidacloprid) as a drench. I've ordered some Avid to spray as well. I assume I should also be treating the orchids, though I haven't yet seen any bugs on them. How best to treat them? Alternate spraying with both, use the Imidacloprid as a drench and spray with the Avid, or something else? Will the spray affect the flowers? I have a few in bloom and in bud right now, and I'd hate to ruin the flowers with a spray.
    Thanks.
     
  2. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I've used both imidacloprid and Avid on orchids in the same mix with no problems. I wasn't treating thrips, so have no idea how well it works on them.
     
  3. judypots

    judypots New Member

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    Thanks Marni. Will spraying the plants adversely affect the flowers? It does ruin the African violet flowers, which is why I need to disbud them before spraying.
     
  4. Ray

    Ray Orchid Iconoclast Supporting Member

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    There is really no need to alternate pesticides by application. A typical treatment should be to select an appropriate pesticide and use it three consecutive times at one-week intervals. That is done because most pesticides only kill adults, so the repeated treatments increase the probability that you will get the immature stages from earlier treatments as they mature.

    The next time you need to treat, then you switch to a pesticide having a different mode of action (MOA) and use it for the same, three-application regimen.

    In cases where I've mixed pesticides as Marni suggested, I still do the same 3-treatment cycle, then find one with a different MOA than those for the next go-round.
     
  5. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    I haven't noticed any damage to the flowers with this combination.
     
  6. DarleneJay

    DarleneJay Well-Known Member

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  7. Selmo

    Selmo Member

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    Avid (or Abamectin) is a miteicide and is primarily used to control spider mites. It is ineffective at controlling most other types of insects pests (mealy bugs, aphids, thrips, white flies, ants). The imidacloperid is a general insecticide that is effective on most common insect pests, it is systemic and if you use it only as a soil drench it will take 14-21 days to be absorbed and translocated throughout the plant. Delaying results for a couple of weeks, making it seem ineffective. Using imicloperid with a contact insecticide, not Avid, will give quicker results. With thrips it well take a couple of rounds to get rid of them, especially if you have flower buds.