Applied Entomology & Vector Control Laboratory, Department of Zoology, Faculty of Science, Dayalbagh Educational Institute (Deemed University), Dayalbagh - 282 005, U.P., India.
*Corresponding author's: E-mail: chandnarayan_dei@rediffmail.com.
Bioefficacy of synthetic insecticides, chlorpyriphos and temephos was observed against third instar larvae of Anopheles stephensi and Culex quinquefasciatus and both mosquito species are found highly susceptible toward these insecticides. LC50 and LC90 values for temephos were 0.0081 and 0.0765 ppm after 24 hours and 0.0043 and 0.0299 ppm after 48 hours against anopheline larvae and 0.0041 and 0.0164 ppm after 24 hours and 0.0029 and 0.0116 ppm after 48 hours against culicine larvae. In case of chlorpyriphos, the LC50 and LC90 values were 0.0195 and 0.0578 ppm after 24 hours and 0.0136 and 0.0398 ppm after 48 hours of exposure, respectively. Temephos was more toxic to both the targets than chlorpyriphos.
