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Possible mildew question on behalf of a greenhouse grower...

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    Possible mildew question on behalf of a greenhouse grower...

    I gave someone I know a couple of photoperiod seeds for their greenhouse, I only really use autos. It's their first grow and it looks good at the moment. I went round to see them the other day and they had some powdery stuff on the leaves. I've never had that as an issue before and it doesn't seem to be hurting them too badly at the moment at least but I was wondering what it was and if it's going to be an issue. The whole greehouse seems to have some degree of stuff on it and I think it might be mildew. Click image for larger version

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    #2
    Look under the leaves - fungal gnats - also known as 'The Borg'.
    ​​​​​​3 X 3 gorilla. Promix soil . Green Planet Nutes
    Optic 4 - 415w COB 18/6
    Vortex in-line 6" fan

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    • qpwoeiruty
      qpwoeiruty commented
      Editing a comment
      I'll get a pic of the underside next time I swing by there

    #3
    When I zoom in I see little black guys that look like spider mites but I don't see any webbing. I've never seen the Borg that Canuck147 is talking about but with no webs he's probably closer than I am. I can't zoom enough to make out the black guys for facial recognition lol
    Grow for fun I don't smoke
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    #4
    Ya..thats not WPM..you got bugs.
    Shappel S3000 3.5x6x6' ice fishing hut
    2 Viperspectra 600 LED
    45W Root Farm grow/seedling light
    4 Vivosun oscillating fans
    6" Fusion Breath, Fan/Filter
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    Canna Coco/perlite
    General Hydroponics Flora Series
    Cal/Mag
    FloraNectar
    Lost Coast Plant Therapy(WPM, Thrips,Mites,Aphids etc)


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      #5
      Thrips only In the early stage is my opinion.
      could also be spider mites, they only develop the web in the late stages because the colonies are getting to big for the leaves.
      Spider mites in early stages is possible without seeing any web at all..

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      • CaptainWiese91
        CaptainWiese91 commented
        Editing a comment
        I have them in my veggie garden. But the alcohol kills them right away.

      • qpwoeiruty
        qpwoeiruty commented
        Editing a comment
        Could you describe what alcohol you use and how you use it... For example isopropyl alcohol or grain alcohol, whether you dilute it and I'm assuming you spray it.

      • CaptainWiese91
        CaptainWiese91 commented
        Editing a comment
        Isopropyl alcohol, bought in a garden store. 60% alcohol and 40% water.
        Yea I spray it. Just before lights are out or the sun is down.

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