The organic gardeners best defense against both foliar and root diseases. Highly effective against mildews, leaf spots, grey molds and blights. It prevents root diseases caused by pythium, verticillium and fusarium. The active ingredient, a bacterium, grows around root systems or foliage. It also breaks down micro nutrients that become available to plants. Use as a foliar spray or drench. Enough to treat 550 plants or 5000 sq. ft. of turf.