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Abstract : |
The ethyl acetate extract of Excoecaria indica Willd. seed kernel were evaluated for larvicidal activity against common fiarial vector, Culex quinquefasciatus Say (Diptera: Culicidae) at different instars under laboratory conditions. The LD50 values were 19.36, 17.76, 15.57 and 11.96; 16.28, 13.87, 13.14 and 10.99; 30.23, 28.32, 27.03 and 47.29, 45.71, 43.74 and 36.90 mg/10ml for 1st, 2nd, 3rd and 4th instar larvae Culex quinquefasciatus at 3, 6, 12 and 24 hour post exposure respectively. The results also showed that the late instar larvae were more resistant to the extract than those of early instars. , The ethyl acetate extract of Excoecaria indica Willd. seed kernel were evaluated for larvicidal activity against common fiarial vector, Culex quinquefasciatus Say (Diptera: Culicidae) at different instars under laboratory conditions. The LD50 values were 19.36, 17.76, 15.57 and 11.96; 16.28, 13.87, 13.14 and 10.99; 30.23, 28.32, 27.03 and 47.29, 45.71, 43.74 and 36.90 mg/10ml for 1st, 2nd, 3rd and 4th instar larvae Culex quinquefasciatus at 3, 6, 12 and 24 hour post exposure respectively. The results also showed that the late instar larvae were more resistant to the extract than those of early instars., |
