Synergistic effect of Croton bonplandianum Baill. with Cypermethrin and Lambda-cyhalothrin against Aedes aegypti Linn, a Dengue fever vector

• Published in: South African journal of botany 2021-08, Vol.140, p.103-109
• Main Authors: Lakshmi, Kalarikkal Venugopalan, Sudhikumar, Ambalaparambil Vasu, Aneesh, Embalil Mathachan
• Format: Article
• Language: English
• Subjects: Aedes; Cypermethrin; GC-MS; Insecticide; Lambda-cyhalothrin; Larvae; LC50; LC90; Mosquito; Plant extract; Synergy
• ISSN: 0254-6299
• DOI: 10.1016/j.sajb.2021.03.034

•Vector-borne diseases are increasing exponentially, and the mosquito vectors contribute to the majority of it.•Insufficiency of chemical insecticides for vector management has led to newer methods like synergetic approaches.•Synergy implies the combination of different compounds such as chemical insecticides and plant extracts.•Combination of a plant extract, Croton bonplandianum with two chemical insecticides, Cypermethrin and Lambda- cyhalothrin found to provide better larvicidal activity against Aedes aegypti, a dengue fever vector. Vector-borne diseases are increasing exponentially, and the mosquito vectors contribute to the majority of it. Dengue fever is considered one of the foremost causes of causalities around the globe, which is primarily transmitted by Aedes aegypti. Control sequences of this vector species using chemical insecticides are now come to be insufficient due to the rapid resistance development in the aimed species. To avoid this, a newer concept of synergy has been introduced by combining two or more compounds with pesticidal capacity. In this study, a hexane extract of the plant Croton bonplandianum are separately combined with two pyrethroids, Lambda-cyhalothrin and Cypermethrin against the dengue fever vector, Aedes aegypti. Individual larvicidal capabilities and the synergistic effects of these compounds were inquired, and synergism was found to provide better larvicidal activity.