Effects of Seed Dressing Treatment with Trichoderma harzianum on Soybean Growth and Root Rot Disease

In order to clarify the control effect of Trichoderma harzianum Th7 seed dressing treatment on soybean root rot and field application, and provide basis for the promotion and application of T. harzianum Th7 seed dressing agent.This experiment studied the effect of T. harzianum Th7 on the occurrence of soybean root rot, the emergence rate, growth and yield of soybean from 2020 to 2022.The results showed that the control effect of T. harzianum Th7 on soybean root rot at 30 days after emergence was 37.51%-53.80%. The control effect was 38.44%-43.28% at 60 days after emergence. The emergence rate, plant height, pod number per plant, seed number per plant and 100-seed weight of soybean were all increased.The yield of T. harzianum Th7 treatments was 3.27%-12.64% higher than that of non-seed dressing treatments. Therefore, T. harzianum Th7 can be used as a green substitute for chemical seed dressing agent in soybean production.