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Bacillus megaterium A6 suppresses Sclerotinia sclerotiorum on oilseed rape in the field and promotes oilseed rape growth |
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| Affiliation: | 1. Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan 430062, People''s Republic of China;2. Sustainable Agricultural Systems Laboratory, USDA-Agricultural Research Service, Beltsville, MD 20705-2350, USA;1. Instituto Nacional de Tecnología Agropecuaria (INTA)-Estación Experimental Salta, Ruta Nacional 68 Km 172, 4403 Cerrillos, Salta, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Salta, Av, Bolivia 5150, 4400 Salta, Argentina;3. Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Pabellón II, 3er P., Ciudad Universitaria, 1428 Buenos Aires, Argentina;4. CONICET, Universidad de Buenos Aires, Centro de Investigación en Hidratos de Carbono (CIHIDECAR), Facultad de Ciencias Exactas y Naturales Pabellón II, 3er P. Ciudad Universitaria, 1428 Buenos Aires, Argentina;5. Instituto de Investigaciones para la Industria Química (INIQUI), Argentina;1. Ministry of Agriculture, Key Lab of Molecular Biology of Crop Pathogens and Insects, Biotechnology Institute, Zhejiang University, Hangzhou 310029, PR China;2. College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, PR China |
| Abstract: | Sclerotinia sclerotiorum causes serious yield losses in oilseed rape and other crops worldwide. Field trials were conducted at two locations to evaluate two formulations of oilseed rape seed containing the plant-growth promoting bacterium Bacillus megaterium A6 for suppression of this pathogen. Treatments containing strain A6 in pellet and in wrap formulations resulted in oilseed rape seed yields that were similar to the chemical control and significantly greater than the untreated seed control at both locations. Treatments containing A6 in pellet and wrap formulations also resulted in an incidence of disease caused by S. sclerotiorum that was similar to the chemical control. Both of these treatments significantly decreased disease incidence relative to the untreated seed control and to the respective formulated seed controls (that did not contain strain A6) at both locations. Strain A6 applied to oilseed rape seed in these two formulations promoted growth in greenhouse pot studies conducted with autoclaved soil. In two experiments, these treatments resulted in significant increases in mean shoot dry weight per pot and mean % total N per plant relative to their respective controls containing formulated oilseed rape seed without strain A6 and to the untreated seed control. Both formulations provided stable B. megaterium A6 (≥106 CFU) and seed germination (>85%) over a six month period at room temperature. Experiments reported here indicate the commercial potential of these formulations of B. megaterium A6 for suppression of S. sclerotiorum on oilseed rape. |
| Keywords: | Biological control Formulation Oilseed rape Plant growth promotion |
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