Various pyrethroids on bednets and curtains

Verandah trap huts in Tanzania village were used to assess the effectiveness if impregnated bednets and curtains in preventing hut entry and feeding by, and in killing of, Anopheles gambiae and An. funestus. Permethrin, deltamethrin, lambdacyhalothrin and pyrethrum were used for impregnation of damaged or undamaged bednets, sisal eaves curtains or bed curtains made of polypropylene fibre. The performance of the synthetic pyrethroids did not differ statistically significantly, except that on a damage net permethrin was better at preventing feeding. sisal eaves curtains deterred mosquitoes from hut entry but did not kill those that had entered. In assessing damaged nets and curtains it must be recognised that anything less than the best vector control may have no appreciable impact on holoendemic malaria

Observations on the biting of Anopheles triannulatus bachmanni from the Mato Grosso, Brazil.

Foram coletados em Aripuana, Mato Grosso, Anopheles triannulatus bachmanni com isca humana. Em capturas aos pares menos de 5% dos insetos foram coletados picando dentro de casas, a maioria dos insetos foram coletados nas margens da mata ao por do sol. A determinacao fisiologica da idade indicou uma distribuicao de idade uniforme de femeas, mas o comportamento do voo dos insetos fa-los-ia de pouca importancia como vetor da malaria