Utilization of the waste of sisal industry in the control of mosquito larvae

Revista da Sociedade Brasileira de Medicina Tropical

Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Oliveira Filho, Alfredo M.¹  Melo, Marli T.V.¹  Pizarro, Ana Paula B.¹  Santos, Celso E. dos¹  Parente, José P.¹  Lima, Paulo R.¹ 

关键词: Sisal;    Agave sisalana;    Aedes aegypti;    Culex quinquefasciatus;    Vector control;   

DOI  :  10.1590/S0037-86821999000100005

学科分类：农业科学（综合）

来源: Sociedade Brasileira de Medicina Tropical

【 摘 要 】

The aim of this research was to utilize the waste residues of sisal fiber separation from Agave sisalana leaves to develop a larvicide for the combat of mosquito transmitting tropical diseases. Larvae of Aedes aegypti and Culex quinquefasciatus were exposed to different concentrations of the Agave extract for 24 hours to determine lethal concentrations. The LC50 for A. aegypti was 322 ppm and the LC50 for C. quinquefasciatus was 183 ppm. To detect the active substances, saponins were investigated. It was found that the various components of the extract were effective in eliminating the larvae. Under field conditions, this formulation can probably be used at 100 ppm, wich causes 100% mortality of C. quinquefasciatus larvae after 3-4 days. The product is not recommended for use against A. aegypti due to the necessity for high concentrations and to the fact that the larvae of this species live frequently on drinking water. To avoid fermentation, Agave extract should be used in a dehydrated form which also represent a good formulation for practical use.

【 授权许可】

Unknown