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Bobby from Denver Colorado writes

Can Southern Ag Liquid Copper Fungicide be used on marijuana plants to control powdery mildew?

Answer:

Southern AG Insecticides Liquid Copper Fungicide is not labeled to be used on marijuana so we cannot recommend it for this use.  Below is a response and a list of products we carry when we asked an expert what could be used on marijuana plants for insect control and disease control:

Customers will need to make their own decision as to what they consider safe. Some of these products are natural and organic and others aren’t. Some products, like the miticides, probably shouldn't be used when the plants are flowering.
 
Wettable sulfur for fungus, mites,

Eagle 20EW Specialty Fungicide for fungus

Neem oil for fungus and mite

Answer last updated on: 09/03/2014

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