Abstract
Quinolizidine alkaloids, found in the leaves of Cytisus monspessulanus L. (Leguminosae), were characterized in the cuticle of larvae of the pyralid moth Uresiphita reversalis (Lepidoptera: Pyralidae) when the latter were fed on this weed. By GC–MS analysis of the methanolic extracts of the cuticle, four quinolizidine alkaloids, N-methylcytisine, cytisine, aphylline and anagyrine, were identified as possible defense substances. In addition, the quinolizidine alkaloid, (+)-2,3-dehydro-10-oxo-α-isosparteine was characterized in both the insect and host plant.
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