Water extracts of hargal plant (solenostemma argel, del hyne)‎ and usher (calotropis procera ail)‎ leaves as natural insecticides against mosquito larvae

الملخص EN

This study was carried out to evaluate the insecticidal efficacy of water extracts of Hargal plant, Solenostemma argel Del Hyne, and Usher, Calotropis procera Ail, leaves against the larvae of two mosquito species, Anopheles arabiensis and Culex quinquefasciatus.

The synthetic larvicide, Abate® (Temphos), was used as a standard.

Statistical analysis showed significant differences between the tested concentrations of each plant, with activity increases progressively with dosage rates.

The highest concentrations of the two plants gave the best and comparable results with that of standard insecticide, Temphos.

Hargal extract showed the best LD50 against Cx.

quinquefasciatus (0.006ml / L) and An.

arabiensis (0.140ml / L), as compared with Usher extract (0.108 and 0.263 ml / L, respectively).

The current results were considered promising to proceed in studying the bioactive plants which represent an environmentally sound alternative for the synthetic larvicides.