Glassdub
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Uggh, not in my experience, baking soda is BS in my book, I went straight to copper, probably not advisable for cannabis though, H2O2?1 gallon water-1 tbs baking soda works fairly well on tomatoes. My neighbor told be about it. He also said the blight lives in the soil. Using mulch prevents the soil from splashing on the leaves when it rains.