ULMASUD®, a branded commercial product made from a mix of rock powder (70%) and bentonite (30%). It is permitted for use in organic and Biodynamic viticulture to combat both downy mildew (peronospera) and powdery mildew (oidum). It dehydrates wet foliage quickly. Application rates are 0.7-1.0kg/hl pre-flowering to bunch closure. It can be sprayed every 4-6 days. It can be used with wettable sulfur (pH acid). It cannot be used with copper-based sprays. It is not harmful to insects.