How To Identify and Control Powdery Mildew on Cannabis Plants



How To Identify and Control Powdery Mildew on Cannabis Plants Professor DeBacco Powdery Mildew Identification White …

23 Comments

  1. Great advice and videos. Thank you for your time. I do have what I believe is pm on my flowers. You mentioned H²O² for spraying an indoor plant. I seen in a reply to spray that once every 3-5 days. Is the H²O² mixed with water to dilute it?
    If it is to be diluted. What parts of each is mixed? I've seen 1/3 & 1/9. Now you show H²O² with no water. So you get my confusion being a first timer grower 😁

  2. I could harvest two plants right now. One has powdery mildew but one seems to be ok. Should I wash my buds in hydrogen peroxide or baking soda, spray with milk and water? Should I hang them to dry in separate places. Help!

  3. Due to lack of more airflow and over crowding I have pm.

    What’s confusing me is it’s not aggressive & isn’t spreading.
    I did catch it very early and changed conditions have I just slowed it down & it will get a good grip in a couple of weeks.

  4. My outdoor Cannabis plants are getting really covered in the powdery mildew. But they are starting to bud now. Can some one please tell me how to treat the mildew while it is budding? Is it safe to soak your plants in a solution while they are budding ? Only about 3 maybe 4 weeks left until harvest and really dont want to lose my crops

  5. Into flower now here in S. Ontario. Can I spray the whole plant with milk or just leaves? Avoiding flower is not that easy. Should I stop spraying at a certain time nearing harvest?

  6. Thank you very much professor! This video was very helpful. Lots of good information.

    So far, I have rotated a baking soda spray along with milk spray for my outdoor crop. The baking soda spray may have been a little too concentrated, it left the leaf tips a little crispy but the plant overall recovered well. I just used a milk spray for the first time today at a ratio of 1:9 (milk:water) I was concerned that too much concentration would encourage mold or other fungal pathogens. Look forward to seeing the results.

    The biggest take away from what I’ve learned (specifically for outdoor cultivation) is that nature will consistently keep you on your toes. The best measures are always preventative. Location and strain selection are indeed very important factors to consider when cultivating outdoor.

  7. One of the things you can do is to treat areas away from your plant . watch for trees,shrubs and other plants that are affected by fungus and treat them . Fight the fungus before reaching the crop .

  8. i'm on week 5 of flower and have a little bit of pm issues.
    Should i spray hydrogen peroxide daily/once a week?
    Can i spray with the lights on?

    Love the videos bro, helps a ton!

  9. Hows it going? i had MILD Powdery Mildew my last harvest. about a month ago. i defoliated and sprayed a bunch of Lost Coast Plant Therapy before harvest. Are there still spores in my room i was growing in?

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