physan

  1. L

    White powder mildew and Physan

    Sorry if this has been covered, I couldn't dig up anything relevant in search. Is it ok to use Physan 20 to control white powder mildew? The Physan info shows 2 tsp/gallon for control of mildew on roses. I had some buds develop the mildew during the drying process. Despite some claims...