FUTA JOURNAL OF RESEARCH IN SCIENCE

VOLUME 11 NUMBER 1 2015

Paper Details

  • Title :LARVICIDAL ACTIVITY OF A PERENNIAL HERB, SOLANUM XANTHOCARPUM AGAINST THE LARVAE OF CULICINE SPECIES
  • Author(s) : I.A. Simon-Oke, O.J. Afolabi and O.T. Ajayi
  • Abstract:

Several plants indigenous to many continents are used as natural insecticides especially for the control of mosquitoes which carry pathogens causing human diseases. In this study, Larvicidal activities of the fruit and root of a perennial herb, Solanum xanthocarpum on the fourth instar larvae of culicine species were carried out at various concentrations of 1ml, 2ml, 3ml, 4ml and 5ml . The bioassays were carried out following the methods recommended by World Health Organization, using the root aqueous extract at the volume of 1ml and 5ml for 24 and 48 hours of exposure. At 24 hrs of exposure, there were 36.6% and 66.6% mortality rates respectively. But after 48 hours of exposure, there were 90% and 100% mortality rates. At both 24 and 48 hours exposure of the culicine larvae, the mortality rates increased to 66.67%± 4.71 and 96.67%± 4.71 which showed a significant difference on the hours of exposure. At 1ml and 5ml volume of the fruit extract, the percentage mortality was 86.7% and 90.7% respectively after 24 hours of exposure while at the same volume, after 48 hours there were 90% and100% mortality rates respectively. At both 24 and 48 hrs of exposure of the larvae, there was high mortality rate of 90.00± 2.89 and 100.00± 2.89 (P.>0.05). However, there was a significant difference (P<0.05) between the percentage mortality rate of the fruit and root extracts, this revealed that the fruit of S. xanthocarpum have proved to be more efficient in the control of culicine larvae. Keywords: Solanum xanthocarpum, Culicine, Fruit, Root, Mortality