Toxicity of Bacillus species to larvae of 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.

Toxicity and cytopathology mediated by Bacillus thuringiensis in the midgut of Anticarsia gemmatalis (Lepidoptera: Noctuidae)

“…Anticarsia gemmatalis susceptibility to Bt confirms bacterium efficacy when controlling this pest, however, this can vary according to the insect species 31,32 . Spodoptera frugiperda J. E. Smith 33 , Helicoverpa armigera Hübner 34 and Spodoptera litura Fabricius 35 (Lepidoptera: Noctuidae) are susceptible to different Bt concentrations.…”

Avaliação do efeito dos compostos biológicos Bacillus thuringiensis var.israelensis e Espinosade na sobrevida de larvas de Lutzomyia longipalpis (Diptera: Psychodidae) sob condições de laboratório

“…(2007) observaram que larvas de Lu. longipalpis foram suscetível a protoxinas de Bacillus thuringiensis serovar israelensis, apresentando mortalidade superior a 50% e exibindo atraso de muda quando comparado a controles Wermelinger (2000). observou em condições experimentais taxas de mortalidade de até 81,2%.…”