Antagonismo de Bacillus frente a hongos fitopatógenos de cultivos hortícolas

The objective of the present work was to determine the effect of Bacillus isolates against the phytopatogenic fungi Fusarium oxysporum and Fusarium moniliforme . The antagonistic at seven and fifteen days effect of 14 stains of Bacillus against two Fusarium species was determine. In the antagonistic assay against F. oxysporum , nine bacterial isolates kept the fungal inhibition over 80 % for seven and fifteen days. In the experiment against F. moniliforme , only six isolates showed inhibition percent of over 50 % after 15 days of incubation. In this work the high potential of new isolates of Bacillus as antagonists of Fusarium , phytopatogens of vegetables crops, was demonstrated. RCGr32, RCQ7, and RCGr33 were selected as the best promising isolates for the biological control of these fungi. Key words: biological control, Bacillus , Fusarium oxysporum, Fusarium moniliforme, vegetables.