Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Sesquiterpene lactones. XXXVIII. Constituents of Picris echioides L. and their antifeedant activity.

Abstract

Reinvestigation of components of the composite plant Picris echioides led to the isolation of pure jacquinelin and 8-deoxylactucin, the chemical structures of which are given. Using the stored products pests Tribolium confusum, Trogoderma granarium and Sitophilus granarius as test insects, the deterrent activities of the 2 compounds and their 1:5 mixture, and of a chloroform extract of the plant, were demonstrated.