Efficacy of some plant extracts on anopheles gambiae mosquito larvae

Efficacies of both the ethanolic and aqueous extracts of Calotropis gigantea, R. Br. (Ascelepiadaceae), Physalis angulata L., Aframomum melegueta K. Schum, Piper guineense Schum & Thonn, Delonix regia (Bojer ex Hook.) Raf., Xylopia aethiopica (Dunal) A. Rich, Blighia sapida Koeing, Tetrapluera tetraptera, Jatropha curcas Linn. and Raphia vinifera were tested on second instar larvae of Anopheles mosquito for 24hours. The LC50 and LC95 conducted showed that the ethanolic extracts of P. guineense seeds emerged the most active with 0.028mg/ml while the aqueous extracts of D. regia (20mg/ml) seeds, J. curcas (18.25mg/ml) seeds and R. vinifera (20mg/ml) seeds were the least active. For the mean mortality graph against concentration, the Sigmoid (S-shape) pattern was obeyed in which case; the mean mortality varied directly with concentration.

Autorentext

Sulaimon Adebisi Aina is a young man in his early 30s and a native of Sagamu. He bagged both his B.Sc. and M.Sc. in Zoology (2005 & 2008) from Olabisi Onabanjo University, Ago-Iwoye, Ogun State. He currently works as an Assistant Lecturer in the Department of Plant Science and Applied Zoology of the Institution and married to Haleemah Sanusi Aina.