title: Comparison of two commercial formulations of Bacillus thuringiensis var. israelensis for the control of Anopheles aquasalis (Diptera: Culicidae) at three salt concentrations.
abstract: Anopheles aquasalis larvae are salt water tolerant, preferring concentrations between 10 and 20 parts per thousand (ppt). The larvicidal efficacy of two formulations of Bacillus thuringiensis var. israelensis (Vectobac-12AS and Bactivec), was investigated against An. aquasalis at salinities of 0, 10, and 20 ppt. A probit analysis was used to calculate the lethal concentrations (LC50 and LC95) for each product at each salinity. The LC50 and LC95 were higher for Bactivec than Vectobac-12AS, and for Bactivec, the LC50 and LC95 increased with salinity. Vectobac-12AS should thus be preferred to Bactivec for An. aquasalis control, especially in saline breeding habitats.
authors.affiliation: Instituto de Investigaciones en Biomedicina y Ciencias Aplicadas, Universidad de Oriente, Estado Sucre, Venezuela. fosborn2001@yahoo.com
authors.forename: Frances R
authors.initials: FR
authors.lastname: Osborn
authors.forename: Melfran J
authors.initials: MJ
authors.lastname: Herrera
authors.forename: Cruz J
authors.initials: CJ
authors.lastname: Gómez
authors.forename: Armando
authors.initials: A
authors.lastname: Salazar
mesh_terms: D000818:Animals; D000852:Anopheles; D001413:Bacillus thuringiensis; D007814:Larva; D007928:Lethal Dose 50; D010572:Pest Control, Biological / Q000379:methods*; D012965:Sodium Chloride
chemical_list: D012965:Sodium Chloride