Larvicidal activities of the peel of three citrus fruits againstculex Pipiens

The larvicidal action of three ethanol extracts of peel oils of lemon, grapefruit and navel orange was tested against the early fourth instar larvae of Culex pipiens and the resulting pupae. The LC50 values were 18.5, 20.3 and 26.5 and the slope functions were 2.9, 2.9 and 3.9, respectively. The action of the lemon extract extended to the pupae which resulted from larvae exposed to sublethal dose. Some of the pupae were unable to escape from the larval exuviae

Natural leishmania infection in rock hyrax, procavia capensis [Pallas, 1766] order: hyracoidea, trapped in Najran, Saudi Arabia

In this paper, natural Leishmania sp. infection was demonstrated serologically [IHAT] and parasitologically [smear examination] in 2 out of 4 rock hyraxes trapped in the highlands of Najran, southern part of the Kingdom of Saudi Arabia. It was concluded that the identity of the Leishmania parasite[s] in such a focus is essential since it has implication in control and treatment