Bio
Dr. Samuel Tennyson is a dedicated researcher in the field of Zoology, with a strong focus on entomology and pest management. He earned his Ph.D., M.Sc., and B.Sc. in Zoology from the University of Madras. Dr. Tennyson has been affiliated with Madras Christian College, Chennai, and has also been associated with Thiruvalluvar University. His research interests include the study of botanical insecticides, mosquito vector control, and the antifeedant activity of plant extracts against agricultural pests. He has authored numerous papers, including notable works on the efficacy of tobacco leaf extracts against dengue vector mosquitoes and the antifeedant activity of various leaf extracts against Spodoptera litura. Dr. Tennyson is a Fellow of a recognized research body and has contributed significantly to the field of natural product-based pest management.
Educational Journey
University of Madras
Ph.D., Zoology, M.Sc., Zoology, B.Sc., Zoology • Zoology
Experience
Madras Christian College
0 - 0Research
Efficacy of Tobacco Leaf Extracts on the Larva of the Dengue Vector Mosquito
Botanicals have gained prominence as alternate to most artificial pesticides within the management of mosquitoes. Insecticides derived from botanical sources are natural products, are chiefly secondary metabolites and natural chemicals that have some advantages over their conventional counterparts in that they are highly degradable. In the present study, the phytoextracts of Nicotiana tabacum leaves was tested for larvicidal activity against the third instar larvae of the dengue vector, Aedes aegypti at concentrations of 0.0125, 0.025, 0.05 and 0.1% for 24, 48 and 72 hours of exposure. The petroleum ether extract exhibited the highest activity with respective LC50 values of 0.09, 0.03 and 0.01%. Nicotiana tabacum leaf extracts for the control of mosquito larva is well documented as many types of research have gone into the larvicidal activity of tobacco plant extracts for the control of vector mosquitoes, and the mode and mechanism of action of the phytochemical component nicotine responsible for the mortality of mosquito larvae is highlighted.
