We've been using MST for several years to help control rhizoctonia or
"black scurf" and other soil diseases on our potatoes and have seen
greatly improved control. MST combines plant-friendly fungi, including
mycorrhizae and bacteria, in a dry nutrient package. For use on all
crops, whether in a potting soil, directly with transplants, or in the
planter box with the seed. Recommended rate is 1-2oz/100# seed potatoes;
4-8oz/100# of other seed. OMRI-A.