Salvia miltiorrhiza root rot prevention method

The invention relates to the technical field of Chinese herbal medicine planting and particularly relates to a salvia miltiorrhiza root rot prevention method. The method comprises field preparation, seminal root selection, seminal root treating before transplanting and seminal root prevention after transplanting. The seminal root treating before transplanting comprises the steps of submerging selected seminal roots in a prepared 90mug/ml-110mug/ml tiadinil solution for 5 minutes to 10 minutes, and getting the seminal roots out to be transplanted immediately. The prevention step comprises performing root irrigation treatment on salvia miltiorrhiza through chemicals for 2 to 3 times during the whole planting, wherein the adjacent twice root irrigation interval is 45-60 days, and the time of the first root irrigation is the 45th-60th days after seminal root transplanting. The root irrigation treatment chemicals comprise the 90mug/ml-110mug/ml tiadinil solution with the effective concentration between 480 mug/ml and 520mug/ml, and the tiadinil solution application amount is 200-300g/hm2. By the aid of the method, the salvia miltiorrhiza planted through the steps has the advantages that the root rot incidence is reduced apparently, and the quality and the yield of salvia miltiorrhiza are improved.