Grower Tip of the Week – How to Get Rid of Powdery Mildew

 Posted by at 8:51 AM on February 24, 2010  Grower Tips  Add comments
Feb 242010
 

This week I asked my facebook friends ‘What is the best way to get rid of powdery mildew?’ Here are the answers I received. Like always, these are not MY tips, they are from my survey, so take them with a grain of salt:

Sarge Hart – Sulfur burner works best for powdery mildew

Alexander Cosey – Powdery mildew is a common fungus, can be prevented with good ventilation and low humidity levels. Try a fungicide clean and cut infected area it thrives on the plants nutrients

Tammy Freire – 1 tsp. of baking soda in one gal. of water sprayed on plants until problem disappears. Doing it right now and is working well!

Josue Lopez – Try a sulphur spray or burner

Ken Hochhalter – Stop mildew before it starts. Cleanliness – avoid humidity – stale air – and low light. Get some air moving around the plants. Avoid excess nitro. Copper and sulfur spray can help prevent. Biological apply serenade or spray with baking soda and water. Baking soda changes the ph and mold cannot grow.

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  • NoInhale

    Without powdery mildew, how will 12th graders rip off 9th graders with shitty weed? “Look at all those crystals…you’re lucky I’m not charging you a dub 5…”

  • johnny1

    thats funny , 1 time a friend came over rolled a joint off the table

    he was smokin a bud with red and white hairs

    i have a red and white dog . do the math

    lesson : dont grab buds that aint yours!

  • johnny1

    Ive heard of dilluting milk in water

    spraying plants.

    overcrowding and excessive fan leaves can stop air flow and cause pm

    spacing plants out helps indoors
    never had problems outdoors with PM

  • http://igrowblog.org Justin

    I just had to deal with 10 hours of separating our good stuff from the stuff with mildew on it. My buddy has some good stuff to say about it here http://igrowblog.org/powdery-mildew-a-problem-and-a-cure.html , you guys have any suggestions for keeping powdery mildew at bay while and after you are flushing?

    • Gary

      I recently battled powdery mildew on plants 7-8 weeks in flower.

      The best solution I have found is to spray down the plant with the following:
      1/4 cup hydrogen peroxide 3% or better
      1 tspn Dawn diswashing soap
      1 gallon of water

      I had to spray them a few times over a few days but it cleaned off the mildew enough to harvest the plant and suffer no taste or powder issues.

      The powdery mildew did screw up weeks 7,8, 9, 10 on a seventy five day flowering strain. The crystal production has been greatly reduces.

  • http://www.i-bukmacher.pl zaklady bukmacherskie

    It’s always pleasure to read your posts, will back here soon

  • troy

    Tammy Freire – 1 tsp. of baking soda in one gal. of water sprayed on plants until problem disappears. Doing it right now and is working well!

    is tammy spraying it when the lighs are shut off or on?

    • Eeyore

      I also would like to know what time of the light cycle Tammy F. was spraying.

  • http://www.howtogrowweed420.com how to grow weed

    I hope my foliar feeding doesnt increase my risk of powdery mildew development… :( worried.

  • Eeyore

    I am having a problem with powdery mold on my patients plants. I have heard about burning sulfur to cure the PM however I am unsure of where to locate it a small amount. Can anyone help me with this?

    • miggy420

      Aren’t matches made of sulfur?

    • rich

      burn a book of matches.

  • TLC

    I watch a Hodge Cervantes. Video using a bath of hydrogen peroxide at 3% it was made into a batty with water and the full budding branches were rinsed an lightly stirred gently rinsed off and a fan put on them. It was awesome and I saw it last month on weed bloc and now I can’t find it.