Field evaluation of biodegradable controlled release formulation of fenthion against Mansonia mosquitos.
Southeast Asian J Trop Med Public Health
;
1997 Mar; 28(1): 208-11
Artigo
em Inglês
| IMSEAR
| ID: sea-34700
ABSTRACT
Controlled release monolithic formulation of fenthion, an organophosphorus mosquito larvicide, prepared by the physical entrapment of the active agent into biodegradable polymer matrices was evaluated against Mansonia mosquito larvae breeding in hydrophytes infested coconut husk retting ponds. Field evaluation was carried out at two application rates viz, 2.5 and 1.0 ppm. Absolute control of larval breeding was observed for 25 and 17 weeks and over 50% reduction in breeding density was observed for another 3 and 2 weeks for the respective application rates of 2.5 and 1.0 ppm. The bioassay carried out with the water samples collected from the ponds treated at 2.5 ppm against the fourth instar larvae of Mansonia annulifera showed larval mortality of more than 95% for 14 weeks and 80-95% from 15 to 25th week. The concentration of fenthion in the treated ponds was found to vary between 0.006 and 0.095 ppm during the evaluation period.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Biodegradação Ambiental
/
Filariose Linfática
/
Feminino
/
Humanos
/
Masculino
/
Controle de Mosquitos
/
Preparações de Ação Retardada
/
Países em Desenvolvimento
/
Fention
/
Índia
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Southeast Asian J Trop Med Public Health
Ano de publicação:
1997
Tipo de documento:
Artigo
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