Insecticide resistance studies of Cypermenthrin 25EC and Chlorpyriphos 20EC against Spodoptera litura fabricius, 1775 (Lepidoptera: Noctuidae) 

DOI: 10.18805/IJARe.A-5260    | Article Id: A-5260 | Page : 453-457
Citation :- Insecticide resistance studies of Cypermenthrin 25EC and Chlorpyriphos 20EC against Spodoptera litura fabricius, 1775 (Lepidoptera: Noctuidae).Indian Journal Of Agricultural Research.2019.(53):453-457
Rupa Sule and Dolly Kumar dollymsu@gmail.com
Address : Department of Zoology, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara-390 002 Gujarat, India.
Submitted Date : 30-03-2019
Accepted Date : 24-05-2019

Abstract

Spodoptera litura is one of the important pests and causes considerable damage to the crop. The indiscriminate use of insecticides result in development of resistance. Hence experiments were planned in laboratory conditions. The pest was reared in laboratory for many generations without exposure to any insecticides during 2018-19. After ensuring infection free culture, the insecticide resistance monitoring assays were performed to determine the development of resistance against two insecticides Cypermethrin 25EC and Chlorpyriphos 20EC by leaf-dip methodology. It was performed for five subsequent generations. The experimental results indicate greater resistance developed in Cypermehtrin 25EC @ 0.5 ppm (LC 50: 0.49, LC 90: 0.94) as compared to Chlorpyriphos 20EC @ 0.05 ppm. (LC 50: 0.05, LC 90: 0.34). This shows that there is onset of resistance in Cypermethrin 25EC, which may cause adverse effects, if not used in proper rotation with other insecticides.

Keywords

Chlorpyriphos Cypermethrin Insecticides Laboratory Resistance Spodoptera litura

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