For fungicide products used as part of a good pest prevention and maintenance program that are listed as acceptable with the OMRI (organic certification standards)
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Oxidate (hydrogen dioxide)
Serenade
Actinovate
Millstop
Stylet Oils
Neem oils
Sulfur based products
A Sulfur burner

Any of the above will work well with your clone quarantine program.

If you don't have a good pest prevention / management program in place yet and develop an extreme PM infestation, you might consider two products not on the OMRI list, but are far less toxic than Eagle 20; they are Procure and Compass.
michaelnights Reviewed by michaelnights on . Chemical fungicides to stop powdery mildew I need to develop an intake program for new clones to stop pm from taking hold in my new grow I'm thinking about a 16 day cycle starting with meltatox(group 5 fungicide) then four days later using eagle 20(group 3) then back to the meltatox then finishing with the eagle 20 this will be used on whatever clones I'm thinking about making a mom.....I'll upkeep the moms with that sodium bicarbonate spray and a final dose of seranade just before there put into flower.... My only worries are if the Rating: 5