Effectiveness of applying bacteria Pseudomonas sp., strain B-6798, for anti-phytopathogenic protection of crops in Western Siberia
Biological method of plant protection from phytopathogens is based on applying microbial antagonists of phytopathogens. Today, domestic and foreign markets are represented by a number of bacteria-based formulations; nevertheless, more effective plant protection agents are being searched. The present work examines a possibility of applying formaldehyde-resistant bacteria Pseudomonas sp., strain В-6798, as a potential biofungicide. Different methods for estimation of antifungal activity of the strain were used, including the method linked with inhibition of phytopathogenic fungi by bacteria-antagonists. Growth-promoting activity of bacteria was assessed both in laboratory and field experiments. As the test objects were used the following crops: wheat, oats, maize, potato and fiber flax. Treatment of seeds with Pseudomonas sp., strain B-6798, reduced the overall infestation of cereal crops by seed infection agents by 12-36% due to decreasing the percentage of seeds affected by Helminthosporium and Fusarium root rot causing agents. Bacterization of potato tubers reduced late blight in the period of growing season by 45-50%, rhizoctonia blight and common scab by 40-70% during storage. The optimum concentrations of the applied bacteria for plant protection were within 10-10 CFU/ml. It was established that under the activity of antagonistic bacteria in the laboratory conditions shoot length was increased in 1.5-3.5 times, dry biomass - 1.5-5 times and total root system length - 1.7-3.0 times. According to the results of field experiments, bacterization contributed to increasing the yield of cereal crops and potato by 10-40%, depending on the species and variety.
Keywords
фитопатоген,
ростостимулирующая активность,
биофунгицид,
бактерии-антагонисты,
антифунгальная активность,
phytopathogen,
growth-promoting activity,
biofungicide,
bacteria-antagonists,
antifungal activityAuthors
| Minaeva O.M. | Tomsk State University | mom05@mail.ru |
| Akimova E.E. | Tomsk State University; Siberian Research Institute of Agriculture and Peat of the Russian Academy of Agricultural Sciences (Tomsk) | biotech@sibmail.com |
Всего: 2
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