Development of formulations based on linalool and methyl cinnamate: Testing of stability and evaluation of mosquito repellent activity and mortality against Culex quinquefasciatus

using formulations of methyl cinnamate (MCN05) and linalool (LNL05) and compared with a commercial Transfluthrin vaporizer (CMS) and a negative (Blank05). Formulation MCN05 showed promising repellency, lasting till 60 minutes, repelling 45% of mosquitoes. LNL05 and CMS were effective initially, but the activity declined after 30 minutes, with CMS showing rapid knockdown and hence reduced repellency. Blank05 lasted with the lowest effectiveness (28%) for 45 minutes. Repellency results demonstrated that MCN05 has a more sustained activity than CMS and Blank05 (negative). In the mortality study, the highest (99%) mortality was observed with CMS, followed by MCN05 (48%); LNL05 and Blank05 showed the least mortality.