title: Evaluation of a new formulation of Bacillus thuringiensis israelensis.
abstract: The aim of this study was to determine the potency (ITU) and efficacy of a liquid formulation of Bacillus thuringiensis israelensis developed by the State University of Londrina named BioUel, against early fourth instar larvae of Aedes aegypti and Culex quinquefasciatus. The ITU/mg of BioUel was 960, the LC₅₀ was of 0.271 (± 0.39) ppm, and the LC₉₅ was 0.634 (± 0.099) ppm, in larvae of C. quinquefasciatus. In A. aegypti larvae, LC₅₀ was 0.332 (± 0.042) ppm and LC₉₅ was 0.694 (± 0.073) ppm. The ITU level of BioUel and its control results were similar to most commercial products tested. Stability was of approximately 90 days, which allows for local production.
authors.affiliation: Departamento de Biologia Animal e Vegetal, Universidade Estadual de Londrina, PR, Brazil. jea@uel.br
authors.forename: J
authors.initials: J
authors.lastname: Lopes
authors.forename: O M N
authors.initials: OM
authors.lastname: Arantes
authors.forename: M A
authors.initials: MA
authors.lastname: Cenci
mesh_terms: D000330:Aedes; D000818:Animals; D001413:Bacillus thuringiensis; D003465:Culex; D007814:Larva; D007928:Lethal Dose 50; D010572:Pest Control, Biological / Q000379:methods*