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  • Title: Evidence for an isobutylamide associated with host-plant resistance to western flower thrips, Frankliniella occidentalis, in chrysanthemum.
    Author: Tsao R, Marvin CH, Broadbent AB, Friesen M, Allen WR, McGarvey BD.
    Journal: J Chem Ecol; 2005 Jan; 31(1):103-10. PubMed ID: 15839483.
    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.
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