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Newbie needs help with some orchids

Discussion in 'Issues, Disease and Pests' started by Tony de Jesus, May 8, 2022.

  1. May 8, 2022 #1
    Tony de Jesus

    Tony de Jesus New Member

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    Hi I have several orchids that are going through this I am thinking is a disease that is speeding between them , I tried using 70% isopropyl alcohol but it really doesn’t do anything . Can anyone please help me save this orchids . Thanks
     

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  2. May 8, 2022 #2
    spiro K.

    spiro K. Well-Known Member

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    Oh my! You have a scale insect infestation.
    I would use an old toothbrush (soft) dipped in either alcohol or soapy water and brush off as much of them as possible. Top and bottom of leaves.
    Then rinse, let dry and use horticultural oil (according to directions) sprayed on top and bottom of leaves and stems. Repeat on a regular basis (according to directions). There are other ways with insecticides as well.
     
  3. May 8, 2022 #3
    Tony de Jesus

    Tony de Jesus New Member

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    Hi thanks for this info . What insecticides will you recommend so this doesn’t keep spreading thanks
     
  4. May 8, 2022 #4
    spiro K.

    spiro K. Well-Known Member

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    Regular applications of horticultural oil solution will eliminate the scale.
    Insecticides are poisons , and should be a last resort.
     
  5. May 8, 2022 #5
    Marni

    Marni Well-Known Member Staff Member Supporting Member

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    If you have it on a lot of plants and topical application is not feasible, anything with imidicloprid in it would work. It is a systemic so you don't need a direct hit to be effective. Bayer 3 in 1 Insect Disease & Mite Control is readily available at many stores.
     
  6. May 9, 2022 #6
    Ray

    Ray Orchid Iconoclast Supporting Member

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    Marni hit it - you need a systemic or translaminar insecticide. The hard shell is a protective covering that renders topical treatments mostly useless. Spiro’s recommendation of a horticultural oil is also good, but with that extreme infestation, it might be difficult to get a complete coverage.

    with any insecticide, treat the plants by wetting all exposed surfaces thoroughly and drench the potting medium. Do three treatments at one-week intervals.
     
  7. May 9, 2022 #7
    Tony de Jesus

    Tony de Jesus New Member

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    Hi thanks for all this help , I went and bought 3 in 1 insecticide and applied it today will let you know how it went in 3 weeks thanks for all of your help
     
    Marni likes this.