title: Evidence for an isobutylamide associated with host-plant resistance to western flower thrips, Frankliniella occidentalis, in chrysanthemum.
abstract: Bioassay-directed fractionation of extracts of chrysanthemum leaves using a choice test permitted isolation of a fraction that exhibited repellent activity against the western flower thrips (WFT). Analysis of this fraction from cultivars exhibiting varying degrees of host-plant resistance to WFT by high performance liquid chromatography revealed a distinctive peak, the height of which correlated with the degree of resistance of those cultivars to WFT. The peak was attributed to a novel unsaturated isobutylamide, N-isobutyl-(E, E, E, Z)-2,4,10,1 2-tetradecatetraen-8-ynamide.
authors.affiliation: Food Research Program, Agriculture & Agri-Food Canada, 93 Stone Road West, Guelph, Ontario NJG 5C9, Canada.
authors.forename: Rong
authors.initials: R
authors.lastname: Tsao
authors.forename: Chris H
authors.initials: CH
authors.lastname: Marvin
authors.forename: A Bruce
authors.initials: AB
authors.lastname: Broadbent
authors.forename: Martina
authors.initials: M
authors.lastname: Friesen
authors.forename: Wayne R
authors.initials: WR
authors.lastname: Allen
authors.forename: Brian D
authors.initials: BD
authors.lastname: McGarvey
mesh_terms: D000480:Alkynes; D000577:Amides / Q000032:analysis; D000818:Animals; D002073:Butanes / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D031202:Chrysanthemum / Q000737:chemistry* / Q000469:parasitology*; D005260:Female; D006790:Host-Parasite Interactions; D007302:Insect Repellents / Q000032:analysis / Q000737:chemistry*; D007313:Insecta / Q000502:physiology*; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D000480:Alkynes; D000577:Amides; D002073:Butanes; D007302:Insect Repellents; C503519:N-isobutyl-(E, E, E, Z)-2,4,10,1 2-tetradecatetraen-8-ynamide; D010936:Plant Extracts