Toxicity of Bacillus species to larvae of Lutzomyia longipalpis (L. & N.) (Diptera: Psychodidae: Phlebotominae) Translated title: Toxicidade de espécies de Bacillus a larvas de Lutzomyia longipalpis (L. & N.) (Diptera: Psychodidae: Phlebotominae)

Abstract

A study was conducted to compare the susceptibility of third instar larvae of Lutzomyia longipalpis (L. & N.) (Diptera: Psychodidae: Phlebotominae), the vector of the American visceral leishmaniasis to two strains of Bacillus thuringiensis serovar israelensis, one strain of Bacillus sphaericus (all pathogenic to Diptera Culicidae) and a strain of B. thuringiensis ser. morrisoni (pathogenic to larvae of Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae)). Larvae of L. longipalpis showed similar susceptibility to the two strains of B. thruringiensis ser. israelensis, while B. sphaericus and B. thuringiensis ser. morrisoni showed low and no larvicidal effect to this vector, respectively.

Translated abstract

Foi feito um estudo comparativo da susceptibilidade de larvas de terceiro estádio de Lutzomyia longipalpis (L. & N.) (Diptera: Psychodidae: Phlebotominae), vetor da leishmaniose visceral americana, a duas estirpes de Bacillus thuringiensis sorovar israelensis e uma de Bacillus sphaericus, todas patogênicas a dípteros Culicidae, além de uma de B. thuringiensis sorovar morrisoni, patogênica a larvas de Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae). Larvas de L. longipalpis mostraram-se susceptíveis às duas amostras de B. thuringiensis sorovar israelensis, mas com baixa e nenhuma susceptibilidade às estirpes de B. sphaericus e de B. thuringiensis sorovar morrisoni, respectivamente.