“…The formulations of AgMNPV from Nitral, Nova Era, Coodetec and Embrapa were also significantly efficient when compared to the check (water). The present results are similar to those reported by Silva (1991), who observed higher speed of kill of larvae of A. gemmatalis and a tendency of higher yield of soybean in plots treated with a crude preparation of AgMNPV than in plots treated with available commercial formulations of the virus. However, the results with the formulations are in disagreement with those reported by Batista (1997), who did not find significant differences regarding virulence of the pathogen and number of larvae in plots treated with the different formulations and the crude extract.…”