Abstract

The presnt study was conducted to evaluate the probable effects of Ricinus communis leaves aqueas extracts on some biological per formance of mosquito Culex pipiens. Study rsults revrealed that hot water extract seems to be more effective than cold water extract. Eggs mortality rate in hot and cold water extracts were 55.7% and 41.8% respectively at concentration 20 mg/ml. Larval mortalities rate was increase as compared with eggs. The extracts of hot and cold water caused pupal mortality was 64.2% and 53.6% respectively at same concentration.