BIOLOGICAL CONTROL FOR THE MANAGEMENT OF SUDDEN DEATH SYNDROME OF SOYBEAN

GONZALEZ, CAMILA; SCANDIANI, M.M; LUQUE, ALICIA G.; LARIO, L.D; MEINI, MARIA ROCIO; SPAMPINATO, C.P

Paraná

Congreso; LIV Reunión Anual de la Sociedad Argentina de Investigaciones en Bioquímica y Biología Molecular; 2018

SAIB

Sudden death syndrome (SDS) is one of the most yield-limiting diseases of soybean. The disease is caused by at least four distinct Fusarium species, with Fusarium tucumaniae being the main causal agent in Argentina. Currently, there is no effective treatment for SDS. Therefore, the use of biological control agents could be an effective strategy for disease management. Three bacteria previously isolated from the soybean rhizosphere, Pseudomonas fluorescens BNM 297 and BNM 296 and Bacillus amyloliquefaciens BNM 340, were examined for their in vitro antagonism tests against F. tucumaniae and for their capability to increase plant growth. Results indicated that BNM297 inhibited mycelial growth of the pathogen by 40% and the other two strains by 35%. Plant growth promotion was evaluated by germination efficiency and vigor of healthy soybean seeds inoculated with the bacteria. These studies revealed that BNM297 and BNM296 showed a modest inhibitory activity (