Biocontrol efficacy of an organic acid against larval form of Culex quinquefasciatus, Culex vishuni group and Anopheles stephensi

To estimate the larvicidal activities, if any of glacial acetic acid, an organic acid against Culex quinquefasciatus (Cx. quinquefasciatus), Culex vishuni(Cx. vishuni) group and Anopheles stephensi (An. stephensi). The common organic acid, glacial acetic acid at some fixed concentrations(0.1%, 0.2%, 0.3%, 0.4% and 0.5%) were used against third instar larvae of Cx. quinquefasciatus, Cx. vishuni group and An. stephensi in order to investigate the rate of mortality after 24 h, 48 h and 72 h of exposure in laboratory. 100% mortality of 3rd instar larva of An. stephensi was recorded at 0.5% concentration after 72 h of exposure. The results or regression analysis revealed that the mortality rate (Y) was positively correlate with the period of exposure (X). The value of R2 in all cases was near 1. The organic chemical may be used efficiently to kill Cx. quinquefasciatus, Cx. vishuni group and An. stephensi. Acid can be applied both in field condition and laboratory condition.