Pyrrolizidine alkaloids as oviposition stimulants for the cinnabar moth, Tyria jacobaeae.

摘要: In choice experiments with artificial leaves, we tested related pyrrolizidine alkaloids (PAs) for their stimulatory effects on the oviposition of cinnabar moth, a specialist PA-containing plant Senecio jacobaea. The PAs from S. jacobaea that stimulated oviposition. Monocrotaline also although this PA is not found in plants genus Senecio. moths preferred ovipositing filter paper mixture extracted to single PAs. Senkirkine, heliotrine, and retrorsine did stimulate nonactive differs only one OH group active senecionine, indicating small structural differences alter activity However, nonhost plant, inaequidens, consisted 81% Oviposition preferences between species seem be determined by chemical compounds other than