Atividade repelente de extratos de Cnidoscolus phyllacanthus Mart. e Ricinus communis L. sobre o comportamento de oviposição de Aedes aegypti L

Biotemas

Eduardo Barbosa Beserra¹  Lafayette Pereira Candido² 

[1] State University of Paraiba, Campina Grande-PB, Brazil.;University Federal of São Carlos, São Carlos-SP, Brazil.

关键词: Comportamento de oviposição;    Dengue;    Extratos de plantas;    Vetor;   

DOI  :  

学科分类：生物科学（综合）

来源: Universidade Federal de Santa Catarina * Centro de Ciencias Biologicas

【 摘 要 】

http://dx.doi.org/10.5007/2175-7925.2015v28n4p105 FemaleAedes aegyptilay their eggs on nearly any moist substrate. Methods with potential to repel oviposition may reduce infestation, thereby contributing to control of epidemics. We evaluated the influence ofCnidoscolus phyllacanthusandRicinus communisplant extracts on the oviposition behavior ofA. aegypti . Lethal concentrations were first determined in experiments with larvae after 24 h of exposure, after which LC50 and LC90 were used to test oviposition repellency. The experiment consisted of an oviposition preference test based multiple-choice and no-choice assays. The Oviposition Activity Indices (OAIs) from the multiple-choice test using bothR. communisandC. phyllacanthuswere negative, suggesting oviposition repellent and deterrent activity. The LC90 of both plant extracts deterred oviposition by this vector, as demonstrated by an OAI = value of -1. In the choice study, mean oviposition values were significantly different betweenR. communisandC. phyllacanthus . In the absence of choice, mosquitoes laid eggs independent of the substrate. In conclusion, our OAI values indicate that all substrates used repelled oviposition byA. aegypti . 

【 授权许可】

Unknown