Feeding Deterrents from Dictamnus dasycarpus Turcz Against Two Stored-Product Insects

The screening for insecticidal principles from several Chinese medicinal herbs showed that the root bark of Dictamnus dasycarpus possessed significant feeding deterrence against two stored-product insects (Tribolium castaneum and Sitophilus zeamais). From the methanol extract, two feeding deterrents...

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Veröffentlicht in:	Journal of agricultural and food chemistry 2002-03, Vol.50 (6), p.1447-1450
Hauptverfasser:	Liu, Zhi Long, Xu, Yuan Jian, Wu, Jien, Goh, Swee Hock, Ho, Shuit Hung
Format:	Artikel
Sprache:	eng
Schlagworte:	Alkaloids - isolation & purification Alkaloids - pharmacology Animals Benzofurans - isolation & purification Benzofurans - pharmacology Biological and medical sciences Chemical control Chemical Fractionation Control Eating - drug effects Food Contamination - prevention & control Fundamental and applied biological sciences. Psychology Insecta - growth & development Invertebrates Larva - growth & development Medically important nuisances and vectors, pests of stored products and materials: population survey and control Pests of stored products Phytopathology. Animal pests. Plant and forest protection Plant Extracts - chemistry Plant Roots - chemistry Protozoa. Invertebrates Quinolines Tribolium - growth & development
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Zusammenfassung:	The screening for insecticidal principles from several Chinese medicinal herbs showed that the root bark of Dictamnus dasycarpus possessed significant feeding deterrence against two stored-product insects (Tribolium castaneum and Sitophilus zeamais). From the methanol extract, two feeding deterrents were isolated by bioassay-guided fractionation. The compounds were identified as fraxinellone and dictamnine from their spectroscopic data. Fraxinellone was demonstrated to possess feeding deterrent activity against adults and larvae of T. castaneum as well as S. zeamais adults with EC50 values of 36.4, 29.1, and 71.2 ppm, respectively. Dictamnine was shown to have feeding deterrent activity against adults and larvae of T. castaneum as well as S. zeamais adults with EC50 values of 57.6, 47.9, and 91.7 ppm, respectively. Keywords: Feeding deterrents; Dictamnus dasycarpus; Tribolium castaneum; Sitophilus zeamais; fraxinellone; dictamnine
ISSN:	0021-8561 1520-5118
DOI:	10.1021/jf010838l