Screening of Asteraceae (Compositae) plant extracts for larvicidal activity against Aedes fluviatilis (Diptera:Culicidae).

Mosquitocidal properties of Basella rubra and Cleome viscosa against Aedes aegypti (Linn.) (Diptera:Culicidae).

OBJECTIVE To investigate the larvicidal and ovicidal activities of acetone, benzene, hexane and methanol leaf extracts of Basella rubra and Cleome viscosa against dengue vector, Aedes aegypti. MATERIALS AND METHODS Twenty five early third instar larvae of Aedes aegypti were exposed to various concentrations and were assayed in the laboratory by using the protocol of WHO 2005. The 24h LC50 val...

Screening of Asteraceae (Compositae) plant extracts for molluscicidal activity.

Quantification of Sesquiterpene Lactones in Asteraceae Plant Extracts: Evaluation of their Allergenic Potential

Sesquiterpene lactones (SLs), mainly those with an activated exocyclic methylene group, are important allergens in Asteraceae (Compositae) plants. As a screening tool, the Compositae mix, consisting of five Asteraceae plant extracts with allergenic potential (feverfew, tansy, arnica, yarrow, and German chamomile) is part of several national patch test baseline series. However, the SL content of...

Screening for larvicidal activity in some Thai plants against four mosquito vector species.

Ninety-six ethanolic extracts from various parts of 84 Thai plant species were tested for their larvicidal activity against Aedes aegypti mosquitoes. Extracts from Rhinacanthus nasutus, Derris elliptica, Trigonostemon reidioides, Homalomena aromatica, Stemona tuberosa and Acorus calamus possessed high larvicidal activity, with LC50 values between 16.0 and 48.2 mg/l. Petroleum ether (PE) and met...

Evaluation of the Larvicidal Efficacy of Five Indigenous Weeds against an Indian Strain of Dengue Vector, Aedes aegypti L. (Diptera: Culicidae)

Background and Objectives. Aedes aegypti, dengue fever mosquito, is primarily associated with the transmission of dengue and chikungunya in tropical and subtropical regions of the world. The present investigations were carried out to assess the larvicidal efficiency of five indigenous weeds against Ae. aegypti. Methods. The 1,000 ppm hexane and ethanol extracts prepared from the leaves and stem...