To establish the mosquitocidal activities of Corchorus capsularis against a common malarial vector, Anopheles stephensi and a dengue vector Aedes aegypti. The larvicidal activity exerted by ethyl acetate was prominent than acetone and methanol extracts in all the concentrations tested against Ae. aegypti larvae. Table 1 shows the lethal concentration values (LC50 and LC90) of acetone, ethyl acetate and methanol extract of the selected plant against An. stephensi and Ae. aegypti. LC50 of 197.34ppm and LC90 of 358.59ppm was recorded against the An. stephensi; furthermore, the experimental larvae of Ae. aegypti showed the LC50 and LC90 values of 222.45 and 383.06ppm respectively on treatment with the acetone extract of C. capsularis. Minimum LC50 values were observed among the experimental larval groups treated with methanol extract of C. capsularis with 176.19ppm and 182.06ppm against An. stephensi and Ae. aegypti). With regard to the ovicidal activity of acetone, ethyl acetate and methanol extract of C. capsularis (leaves) against the eggs of An. stephensi and Ae. aegypti, the eggs exposed to ethyl acetate and methanol extract were shown more susceptibility since, it was apparent that 300 -450 ppm concentrations resulted with no hatchability on An. stephensi and 375-450pp concentrations in Ae. aegypti. The present investigation revealed that the possible utilization of C. capsularis to control mosquito menace to a greater extent. Thus, paving the way for further exploration of identification and isolation of active principles present it the selected plant.
