Assessment of repellent activity of ipomoea cairica (morning glory) extracts against aeded aegypti mosquito / Niram Munirah Mohamed Bederi

Mosquito-borne diseases cause millions of deaths worldwide every year. Dengue fever is one of the important mosquito-borne diseases. Aedes aegypti mosquitoes are the main vector for dengue fever. The dengue viruses are passed on to humans through the bites of an infective female Aedes mosquito (WHO, 2013). Applying repellent is one of the methods to reduce the transmission of dengue viruses. However, to overcome adverse effects from synthetic product, natural product of plant origin can be an alternative (Youssif & Shaalan, 2011). Objective of study is to determine repellent efficacy of lpomoea Cairica (Morning Glory) extraction against adult Aedes aegypti mosquitoes. First phase is collection of sample plant, lpomea cairica (Morning Glory). After sample collection, lpomea cairica was prepared for sampling extraction using soxhlet extraction. The crude extract then was using in preparation of stock solution and serial dilution. Serial dilution was used for testing repellency efficacy of /pomea cairica extract against Aedes aegypti. Highest percentage repellency of lpomea cairica extract is 96.88% at 120 seconds' exposure on the highest concentration (18.93µg/cm²). Optimum repellency of lpomea cairica extract showed at 90 seconds' exposure with ED50 0.29µg/cm² and ED90 1.36µg/cm². Time exposures at 60 seconds and 120 seconds yielded much higher ED50 2.90µg/cm² and 3.24µg/cm² while ED90 34.47µg/cm² and 15.64µg/cm² respectively. /pomea cairica extract is able to repel Aedes aegypti mosquitoes biting at lower effective dose (EDso 0.29µg/cm²). Thus it can consider a very potentially effective repellent product.