Partial characterization and insecticidal properties of Ricinus communis L foliage flavonoids

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 flavo...

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Bibliographic Details
Published in:Pest management science 2003-12, Vol.59 (12), p.1349-1354
Main Authors: Upasani, S.M, Kotkar, H.M, Mendki, P.S, Maheshwari, V.L
Format: Article
Language:English
Subjects:
Animals
Anti-Bacterial Agents - toxicity
Bacillus - drug effects
Biological and medical sciences
biopesticide
Bruchidae
Callosobruchus chinensis
chemical constituents of plants
Chromatography, High Pressure Liquid
Coleoptera - drug effects
Control
Escherichia coli - drug effects
Female
flavonoids
Flavonoids - chemistry
Flavonoids - toxicity
Fundamental and applied biological sciences. Psychology
insect control
insecticidal
insecticidal properties
Insecticides - chemistry
Insecticides - toxicity
kaempferol
leaves
legumes
oviposition deterrents
Ovum - drug effects
Phytopathology. Animal pests. Plant and forest protection
plant extracts
Plant Extracts - toxicity
Plant Leaves - chemistry
post-harvest
Protozoa. Invertebrates
Pseudomonas syringae - drug effects
pulse beetle
quercetin
Ricinus
Ricinus communis
storage pests
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Summary: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.
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.767