Relative abundance (%) of pyrrolizidine alkaloids in adults of Utetheisa ornatrix (male: M, female: F) and the species of Crotalaria used as larval host plants (HP).

C. micans: mic; C. paulina: pau; C. vitellina: vit; C. juncea: jun; C. ochroleuca: och; C. spectabilis: spe; C. incana: inc; C. pallida: pal. Five individuals were used for GC-MS analysis. Only seeds were analysed; the alkaloid profile of leaves was similar. The data are shown as mean ± standard error.