Powdery Mildew help!!

Discussion in 'General Marijuana Growing' started by DQ Blizzard, Feb 6, 2012.

  1.  
    DQ Blizzard

    DQ Blizzard Active Member

    So I noticed white spots on a few leaves the other day, but only on 2 plants that I recently brought in from the Veg room to flower 5 days ago. I didn't take photos because I'm 99% sure it's PM, what are the best, safest way to control and eliminate this issue? I am worried it will spread to the females that are 25 days in 12/12
  2.  
    Desr

    Desr Well-Known Member

    there are many ways.. after doing some research, the easiest may be 1tsp baking soda, 1 qt water, a few drops of liquid soap, and use this as a foliar spray once a week, but id test it out first to make sure your plants not too sensitive.
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    DQ Blizzard

    DQ Blizzard Active Member

    With this foliar spray would it kill and prevent or just prevent? Would I need something to kill it than use the baking soda method?
  4.  
    Desr

    Desr Well-Known Member

    the baking soda increases the ph of the leaves making it unsuitable for the growth of spores..you should be good with just the spray.
  5.  
    ClaytonBigsby

    ClaytonBigsby Well-Known Member

    I just bought some potassium bicarbonate for the same thing. It kills it on contact and the left over potassium is good for the plant. You have to get on thsi NOW and be diligent. Those spores are likely everywhere now. Look into sulfer bombs when your room is empty. There is also a product calle "no powdery mildew", hard to find, but very effective.
  6.  
    DQ Blizzard

    DQ Blizzard Active Member

    It's late so no stores would be open no matter what, but I had baking soda and dish soap so mixed up a 32oz spray bottle with the above directions, will check tomorrow and hope for the best.
  7.  
    Desr

    Desr Well-Known Member

    yeah, good luck.
  8.  
    jpill

    jpill Well-Known Member

    In the future , using fish hydrolysate ( a great vegg food high in nitrogen) will take care of your problems. Foliar feed with it , i'll have to ask whats in it that keeps the pm away !!!! great vegg food also

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  9.  
    DQ Blizzard

    DQ Blizzard Active Member

    Follow up question, I've since done some reading on the baking soda method and I used it last night (as it was late I was happy to have a home remedy). Now the leaves are all covered with white (no doubt baking soda) do I leave this on there or wash with soap and water and if I wash do I do it a day after sprayed or wait, I can't find this answer any where.
  10.  
    roidrage152

    roidrage152 Active Member

    The contact remedies like that usually will last in the area of 3 days. I've never gotten long term relief from any of the contact remedies. I've tried h202, milk mix, baking soda, high ph water, sulfur based sprays, and a couple other things. A Myclobutonil based dip and spray worked for me in one dose. Months later still no PM. I've been doing a good job of maintaining a good environment but I've slipped up and let humidity get into the 80s a couple times. Some people say once you get PM you can never get rid of it. I've researched the idea of it, and not found anything concrete. As far as I can tell the systemic treatment worked, and haven't seen it again since. This stuff lasts about 15-20 days I think, so probably avoid it within a month of flowering. The dosage I used was the one it said to use for tomatoes.
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    Refusedpanda

    Refusedpanda Active Member

    maybe the bacillus in it, that is the active ingredient in serenade(i think). that stuff you have is pretty cool. where did you get it at?
  12.  
    jpill

    jpill Well-Known Member

    Not trying to jack homie's thread but i'll share this with you,

    I got it at my hydro store, I've recently been trying to go as organic as I can with the exception of synthetics for extra weight. Ask around for it "fish hydrolysate" . Also i'll put you on game for something else that will help you. "Soluble seaweed".! Your garden need this in its life if you don't have it. You can find seaweed in liquid form but the "base" of it is made with water so your paying for water weight. Plus the powder is stronger IMO. 3rd picture is of compost tea, I hit them with it twice in veg and twice in flower. First time using the compost tea so im eager to see how it go's !

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