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Grow QuestionsPowdery mildew?

Powdery mildew?

Wadadli_Kushstarted grow question 4 years ago

Hi I've noticed these things appear on some of my leaves over the past week or so. I'm not sure if it's powdery mildew or some other disease. Temp have been mostly 78℉ at night and 91℉ in day but humidity has plagued me with RH values of 70-90%. Can someone offer some help plz

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Week 10

Leaves. White powder

Experimentgreenanswered grow question 4 years ago

Hello, If you try to take a moist towel and wipe away at a spot does it come off or spread around at least? If it does then it's definitely wpm and you'll want to cut down any buds that have it, and then any leaves you can clean do so...but this late in flowering it might be easier to just remove any bits you see with it. Then you would want to do a baking soda spray to kill any spores...probably spray and wipe the whole grow area also, increase airflow tremendously and then hope for the best. Wpm can spread very easily which is the worst part. Lastly when you harvest you could try doing Jorge Cervantes bud washing method to get any lingering pm off, it's basically hydrogen peroxide and water in a tub, wash and then definitely dry to the best of your ability since you're a high humidity zone. Good luck with the problem-solving and happy harvesting. ✌️

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GMSgrowsanswered grow question 4 years ago

Looks like it may just be a ph issue leaving spotty leaves. Doesnt look like PM. If you look under your leaves with a magnifying glass and do see any mites you can spray with a little dawn soap mixed in water and give the undersides and tops of leaves and if any mites present in the buds you can spray them as well. Do at lights off and keep a fan blowing to dry the girls. There wont be any I'll effects or taste change to your buds. Cheers

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Epokwananswered grow question 4 years ago

Hey fellow grower! As someone who battles just about every single grow with PM, I can tell you that is not what you're dealing with. It looks like it could be an insect though, like spider mites. If that's what it is (and not some deficiency) it's not something easy to treat in flower since spraying just about anything onto your buds won't be great. I've had success with an organic pesticide (garlic based) which removed the mites but did freak out and dry my pistils, but I'd have that over a lost crop - plus you can wash your buds after harvest. Perhaps try manually remove the affected parts, and take them outside and try rinse off what you can before looking at any other kinds of treatments. Best of luck!

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blendmedmedmananswered grow question 4 years ago

you have about 2-3 weeks left on this grow, the powdery mildew is just that a powder. you would be able to touch the area and you would have residue on your fingers, it is usually a greyish color but it is a dust like substance, you can take a clean paper towel and put rubbing alcohol on the paper towel and gently wipe the top and bottom with the paper towel and rubbing alcohol this to me looks like a deficiency going on, or at lest from the pictures you can cut the area away with out much stress un less that is a big bud that would ruin your harvest, looks to be a smaller one so it is up to you, she has a few weeks left and ask your self if you think you can fix it before harvest? other wise keep an eye on the area as well as looking at the whole plant. hope this helps

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