In vitro effect of Bacillus thuringiensis strains and Cry proteins in phytopathogenic fungi of paddy rice-field

Efeito in vitro de cepas e proteínas Cry de Bacillus thuringiensis em fungos fitopatogênicos da cultura do arroz irrigado

Abstract

Cry1Ab and Cry1Ac strains and proteins synthesized by Bacillus thuringiensis thuringiensis and B. thuringiensis kurstaki were assessed in the following phytopathogens: Rhizoctonia solani,Pyricularia grisea,Fusarium oxysporum and F. solani, which had their micelial growth decreased after incubation in the presence of the bacterial strains. As to Cry proteins, there were no inhibition halo development in the assessed concentrations.

Paddy rice; Bacillus thuringiensis; phytopathogens; Cry proteins