Chromatographic analysis of the essential oil extracted from the aerial part of the Algerian (Tipaza, the East of Algiers, North Central Algeria) Ruta montana L. (Rutaceae) revealed the presence of higher ketones (C6 - C13), in about 95 %. This essential oil proved to be endowed with a two-fold potency: insecticidal and larvicidal activities against German cockroach (anti-crawling test)/Culex pipiens mosquitoes (anti-flying test) and, mosquitoes larvae (larvicidal), respectively. The extent of German cockroaches that were flipped over on their backs upon pulverization of 1 mL of 1.6 % aqueous solution of the extract, attained 100 %, 10 minutes after spraying. For the same dose, the mortality percentages were 97.5 % for German cockroaches after 24 h, and 99 % for Culex pipiens mosquitoes after 30 minutes. The larvicidal activity was 100 % after lh for a dosage of as low as 9.6 x 10−3 %.
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Boutoumi et al. (2009) studied this question.
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