Comparison of two commercial formulations of Bacillus thuringiensis var. israelensis for the control of Anopheles aquasalis (Diptera: Culicidae) at three salt concentrations.
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.
Osborn
Frances R
FR
Instituto de Investigaciones en Biomedicina y Ciencias Aplicadas, Universidad de Oriente, Estado Sucre, Venezuela. fosborn2001@yahoo.com
Herrera
Melfran J
MJ
Gómez
Cruz J
CJ
Salazar
Armando
A
D000818:Animals; D000852:Anopheles; D001413:Bacillus thuringiensis; D007814:Larva; D007928:Lethal Dose 50; D010572:Pest Control, Biological / Q000379:methods*; D012965:Sodium Chloride
D012965:Sodium Chloride