Abstract
The relationship between the cinnabar moth, Tyria jacobaeae, a specialist herbivore, and its food plant ragwort, Senecio jacobaea, involves periodic total defoliation (and defloration) of the plant, followed by population crashes of the insect. The insect is not only dependent on ragwort for food, but also for the plant’ secondary chemicals - pyrrolizidine alkaloids - that are sequestered by the larvae and probably function as a protection against natural enemies.
Published Version
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