Formulation of bionematicides based on bacteria for the control of the lesion nematode in common bean

espanolBacterias del genero Bacillus pueden suprimirpoblaciones de nematodosfitoparasitos. Sobre la base de esta hipotesis, ocho cepas de Bacillus (SF262, SF264, SF266, SF267, SF268, SF271, SF292 y SF 629)fueronformuladas y aplicadas en el tratamiento de semillas y en la superficie de suelo para el control de Pratylenchus brachyurus en frijol. La aplicacion de las cepas no aumentaron la produccion de granos y la masa de las raices, ni redujeron el numero de nematodos en el suelo y en las raices. Asi, ninguna de las cepas de Bacillus es promisoria para el control del nematodo lesionador en frijol. EnglishBacteria belonging to the genus Bacillus can promote plant growth and suppress plant-parasitic nematode populations. Based on this hypothesis, eight strains of the bacterium (SF 262, SF 264, SF 266, SF 267, SF 268, SF 271, SF 292 and SF 629) were formulated and applied as a seed treatment and/or sprayed on the soil surface with the aim of controlling Pratylenchys brachyurus in common bean under field conditions. The application of the bacterial isolates neither improved the grain yield and the root mass nor reduced the number of nematodes in the soil and in the roots of common bean. Thus none of the isolates of Bacillus spp. evaluated in this work are promising for the control of the lesion nematode on common bean.