Summary
The effects of surface layers ofAzolla pinnata var.imbricata on mosquito oviposition and immature survival were investigated in the laboratory usingCulex quinquefasciatus as the experimental model. Complete surface mats of azolla totally inhibited oviposition and caused 42–85% mortality of immature mosquitoes. The results show that the azolla mats did not affect larval respiration in this species, but caused heavy mortality at adult emergence, most of the young adults being unable to penetrate through the physical barrier of the azolla layers.
Résumé
Azolla contre moustiques: quelques expériences avec Culex quinquefasciatus. Les effets des lits superficiels d'Azollapinnata var.imbricata sur la ponte et la survie des moustiques à l'état immature ont été étudiés au laboratoire en utilisant comme modèle expérimentalCulex quinquefasciatus. Les lits superficiels continus d'azolla inhibent complètement la ponte et déterminent une mortalité de 42 à 85% à l'état immature. Les résultats montrent que les lits d'azolla n'ont pas d'effet sur la respiration des larves de cette espèce de moustiques, mais provoquent une forte mortalité lors de l'éclosion des adultes, la plupart des jeunes adultes étant incapables de pénétrer la barrière physique du lit d'azolla.
Resumen
Azolla vs mosquitos: experimentos con Culex quiquefasciatus El efecto de capas superficiales deAzolla pinnata var.imbricata en la ovoposición de mosquitos y la supervivencia de inmaduros se ha estudiado en laboratorio utilizandoCulex quinquefasciatus como modelo experimental. Capas completas de azolla inhibieron totalmente la ovoposición y causaron entre 42–85% de mortalidad Centre los inmaduros. Los resultados obtenidos muestran que las capas de azolla, no afectan la respiración de las larvas pero causan una elevada mortalidad en el momento de la emergencia de los adultos, ya que la mayoría de jovenes adultos son incapaces de astravesar la barrera física de las capas de azolla.
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Amerasinghe, F.P., Kulasooriya, S.A. Azollavs mosquitoes: Some experiments withCulex quinquefasciatus . World J Microbiol Biotechnol 1, 355–363 (1985). https://doi.org/10.1007/BF01553420
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DOI: https://doi.org/10.1007/BF01553420