[Estimation of the spectrum of the aerial dispersion of Bacillus thuringiensis].

The present paper estimates the number of viable spores of Bacillus thuringiensis per droplet and reveals the importance of this data to improve B. thuringiensis treatments. For a given diameter, droplets from Futura formula contained two times more spores than droplets from the formulas used to date.

[Bactericidal activity of the dye Erio acid red XB 400 towards Bacillus thuringiensis].

Laboratory and field tests revealed that the addition of Erio acid red XB 400 dye (EAR) to Bacillus thuringiensis formulations inhibited spores of the bacillus. In the laboratory, 74% of the spores present in a suspension containing 16 X 10(9) viable spores/mL, and 0.25 gm/l of EAR, were inhibited after 28 h.

Deposit assessment of Bacillus thuringiensis formulations applied from an aircraft.

Deposit assessment after aerial spraying with Bacillus thuringiensis (B.t.) formulations consists of the analysis of the splash of droplets on Kromekote papers and determining the number of bacterial colonies growing on nutrient agar medium Petri dishes.

Partial characterization of a cubic Bacillus phage.

Partial characterization of a cubic Bacillus phage. Can. J.

[Study of lysogeny in Bacillus thuringiensis and B. cereus].

Forty-eight strains of Bacillus thuringiensis and 12 strains of B. cereus were treated with ultraviolet light and mitomycin C. The former agent was the more effective inducer.