Residual effect of commercial applications of larvicides temefos and Bacillus thuringiensis israelensis on Aedes aegypti larvae in recipients with water renewal

Revista da Sociedade Brasileira de Medicina Tropical

Kerr-Pontes, Lígia Regina Sansígolo¹  Pontes, Ricardo José Soares¹  Fundação Nacional de Saúde, Fortaleza¹  Lima, José Wellington Oliveira¹  Universidade Federal do Ceará, Fortaleza¹  Regazzi, Ana Cláudia Ferreira¹ 

关键词: Vectorial control;    Larvicides;    Aedes aegypti;    Dengue fever;    Quality control;   

DOI  :  10.1590/S0037-86822005000400007

学科分类：农业科学（综合）

来源: Sociedade Brasileira de Medicina Tropical

【 摘 要 】

The residual effect of temefos (commercial applications A, B and C) and Bacillus thuringiensis israelensis (D and E) on Aedes aegypti larvae was evaluated, in recipients with water renewal. Forty-four beakers of 1,000ml each (8 for each application and 4 controls) were used. In each beaker, 25 larvae were introduced daily. After 24 hours, the dead larvae were counted, the beakers emptied to 200ml and refilled to original volume, with addition of new larvae. The duration of the maximum residual effect (100% of mortality) was: A-19; B-39; C-40; D-8; E-19 days. The mortality ratio of all applications remained equivalent for 25 days; B, C and E maintained MR equivalent up to 45 days; B and C showed MR 2.40 times greater than E, between 46-95 days; B, compared with A, showed MR 1.90-7.51 times greater between 26-95 days. The conclusion was greater effectiveness of two presentations of temefos, even in an epidemiological situation with long exposure to the product and renewal of water in recipients.

【 授权许可】

Unknown