Larvicidal activities of Cinnamomum osmophloeum and matricharia chamomella extracts against the filarial mosquito culexquinquefasciatus [diptera:culicidae] and their effects on its haemogram

ABSTRACT

The larvicidal activities of the bark essential oils of [Cinnamon] Cinnamomum osmophloeum and the leaf essential oil of [Chamomell] Matricharia chamomella were evaluated Culex quinquefasciatus in laboratory. The toxicity index, LC[50] values were 0.260 and 0.310 mg/L for Cinnamomum osmophloeum and Matricharia chamomella, respectively. Four types of haemocytes prohaemocyte [Pr], Granulocytes [Gr], Plasmatocytes [Pl] and Oenocytoides [Oe] were determined, the present results show that cinnamon and chamomile oils significantly decreased the number of Pr, Gr and Pl and increased the number of Oe. Furthermore, the effect of tested plant oils on the haemocytees surface area were evaluated