Insecticidally active Sesquiterpene furan from Bontia daphnoides L.
1997
Williams, L.A.D. | Williams, L.C. (University of the West Indies Mona, Kingston 7 (Jamaica). Dept. of Basic Medicinal Sciences)
Activity guided isolation of the crude ethanol extract of the leaves and stems of Bontia daphnoides using adult Cylas formicarius as the test organism revealed that the most insecticidally active compounds was the sesquiterpene furan, epigaione. This compound was previously isolated and charaterized by Chinnock et.al., (1987). The 72 hour LC50 values (microgram/insect) found for the furan was 20.80 (17.34-24.52), while the values obtained for a nicotine rich extract of tobacco and a commercial organophosphate insecticide, dimethoate were 32.00 (28.15-40.32) and 9.54 (8.40-10.62) microgram/insect, respectively
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