title: Partial characterization and insecticidal properties of Ricinus communis L foliage flavonoids.
abstract: Aqueous leaf extract of Ricinus communis L (Euphorbiaceae), a cultivated plant in tropical countries, showed excellent insecticidal activity against Callosobruchus chinensis L (Coleoptera: Bruchidae). We have isolated and tested flavonoids as insecticidal and antimicrobial agents. The isolated flavonoids showed potential insecticidal, ovicidal and oviposition deterrent activities against C chinensis L. However, antimicrobial activity against the common microbial infestants of stored pulses, of which C chinensis is a major pest, was found to be insignificant. Two bands having Rf 0.63 and 0.69 were seen on HPTLC plates using mobile phase benzene + ethyl acetate + methanol + formic acid (12 + 4.5 + 2 + 1.5 by volume) as eluant. The Rf values and scanning of the spectrum in the ultraviolet region, showed identity with the flavonoids quercetin and kaempferol. This was further confirmed using HPLC and IR and UV spectrometry. HPLC and HPTLC chromatograms also suggested quercetin to be the major flavonoid present in the hydrolyzed aqueous leaf extract of R communis.
authors.affiliation: School of Life Sciences, North Maharashtra University, PB No 80, Jalgaon-425 001, MS, India.
authors.forename: Shripad M
authors.initials: SM
authors.lastname: Upasani
authors.forename: Hemlata M
authors.initials: HM
authors.lastname: Kotkar
authors.forename: Prashant S
authors.initials: PS
authors.lastname: Mendki
authors.forename: Vijay L
authors.initials: VL
authors.lastname: Maheshwari
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000633:toxicity; D001407:Bacillus / Q000187:drug effects; D002851:Chromatography, High Pressure Liquid; D001517:Coleoptera / Q000187:drug effects*; D004926:Escherichia coli / Q000187:drug effects; D005260:Female; D005419:Flavonoids / Q000737:chemistry / Q000633:toxicity*; D007306:Insecticides / Q000737:chemistry / Q000633:toxicity*; D010063:Ovum / Q000187:drug effects; D010936:Plant Extracts / Q000633:toxicity*; D018515:Plant Leaves / Q000737:chemistry; D044224:Pseudomonas syringae / Q000187:drug effects; D012278:Ricinus
chemical_list: D000900:Anti-Bacterial Agents; D005419:Flavonoids; D007306:Insecticides; D010936:Plant Extracts