Abstract
Second and third generations adults of Pieris rapae crucivora were marked and released shortly after emergence. The results of multi-recapture showed that the adult duration was 4.58±0.24 days (female) and 5.44±0.26 days (male) for the second generation, and 3.24±0.05 days (female) and 3.06±0.04 days (male) for the third. The butterflies of the second generation dispersed in all directions from the release site, while those of the third generation flew mostly in easterly and southerly directions. It is suggested that the reduction of adult duration in the third generation is attributable to increased emigration and mortality.
