Has anyone ever used Safer’s Defender Fungicide

[AllNewToThis]

I live in Ontario Canada. Last year my plants got white powder mildew and this year I was to try and prevent and be ready as the humid outside get really high in the summer. I heard it works on rust spots too. I have read that it’s safe for cannibus plants but want to ask others as some of the other fungicides people suggested I can’t get here in Ontario Canada.
Thanks for any help

 

[Dirtbag]

It would be cheaper and probably better to just use wettable powdered sulphur. Essentially the same thing. Defender is likely 20× the price being premixed.