Data/hora: 04/06/2024 06:36:45

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 20/10/1998
Data da última atualização: | 11/01/2024
Autoria: | ALEXANDER, P.; KITCHENER, J. A.; BRISCOE, H. V. A.
Título: | Inert dust insecticides. Part I. Mechanism of action.
Ano de publicação: | 1994
Fonte/Imprenta: | Annals of Applied Biology, v. 31, p. 143-149, 1994.
Idioma: | Inglês
Conteúdo: | The mode of action of inert dust insecticides on the grain weevil (Calandra granaria L.) has been investigated by determination of mortality-time curves and by a detailed study of the influence of dusts on the water relations of the insects. It has been found that dusts do not depend for their action on any chemical reactivity, some highly inert substances such as diamond and carborundum being very effective. A physical process is therefore indicated. Dusts do not penetrate into the respiratory system, and although large amounts are ingested these seem to have little harmful effect. It has been demonstrated that effective dusts increase the rate of evaporation of water from insects to the air, and that the relative killing powers of different dusts run paralled with their capacities for promoting evaporation. The results are in harmony with the view (proposed by earlier workers) that inert dusts kill insects by inducing death by desiccation.
Palavras-Chave: | Calandra granaria; Mecanismo de acao.
Thesagro: | Inseticida; Mortalidade.
Thesaurus Nal: | insecticides; mechanism of action.
Categoria do assunto: | --
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (919-1) - ADC - AP - PP - S 11457 -  - S 11457 - DIS