EFFECT OF S-HYDROPRENE AND PHYSICOCHEMICAL PARAMETERS ON Culex quinquifasciatus LARVAE

Abstract

Culex quinquefasciatus is a significantly harmful mosquito species recognized for its role in transmission of various diseases worldwide. The extensive resistance to traditional insecticides presents a considerable obstacle to control initiatives. The study sought to evaluate the toxicological and developmental effects of S Hydroprene, administered at concentrations between 0.6 mL and 0.1 mL, on this vector species. F1 generation larvae were bred in entomological cages, 10 % stock solution of S-Hydroprene was prepared and serial concentrations used to test mortality and morphological disruptions of larvae. Physicochemical parameters were also observed to identify changes that could result due to S-Hydroprene to affect development and survival of mosquito using appropriate equipment. From result obtained, LC value was estimated and observed to be 50 very high excluding it from been used as larvicide, it rather demonstrated inhibitory effect on larval development, as indicated by a substantial, dose-dependent prolongation of both larval and pupa durations. Percentages mortality of 0, 5, 5, 5, 3, 5 and 9 were recorded for control, 0.1mL, 0.2mLs, 0.3mLs, 0.4mLs, 0.5mLs and 0.6mLs respectively after 24 hours. S-Hydroprene disrupted larval development, resulting in the emergence of larval-pupal intermediates. Pupation was markedly suppressed, especially when mature larvae were subjected to the compound. The process of pupal morphogenesis was largely unaffected, no deformities were observed in the pupae after larval treatment. The findings indicate that S-Hydroprene may serve as an effective instrument in integrated pest management strategies aimed at this mosquito species, which has acquired resistance to the majority of conventional insecticides. The use of S-Hydroprene in mosquito larva control should be encouraged since resistance has not been observed for it