Isolation and application of Bacillus isolates to suppress soil-borne diseases of soybean
2020
Tsurumi, T. (Akita Prefectural University, Akita-shi, Akita (Japan). Faculty of Bioresource Sciences) | Morita, S. | Maseda, A. | Takakai, F. | Kaneta, Y. | Asano, T. | Kenjo, T. | Sato, T.
In the present study, we aimed to isolate microorganisms that suppress the growth of the causal agent of red crown rot the fungi Calonectria ilicicola and to investigate the effect of microbial material mixed with these isolates on the soil-borne diseases of soybean (Glycine max). We successfully isolated three strains of Bacillus subtilis that suppressed the growth of C. ilicicola from dried chicken manure, all of which were able to survive the high temperatures that occurred during the manufacturing of the microbial material due to their thermal tolerance. We observed that application of the microbial material mixed with these isolates to the soil tended to suppress the development of soil-borne diseases of soybean during the growth period and increased the soybean seed yield compared with plants that were grown without the addition of this microbial material. These results indicate that the application of these three isolates within microbial material to the soil reduces the incidence of soil-borne diseases, such as soybean red crown rot, and increases the seed yield due to the increased health and growth of the plants.
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