Abstract
The adzuki pod worm, Matsumuraeses phaseoli (Matsumura) is an insect pest that attacks the flowers and pods of Vigna angularis. The circadian rhythms of eclosion and mating, and the effects of age and antenna ablation on mating success, were investigated. With a photoperiodic regime of 16:8 (Light:Dark) h, most adult eclosion was observed within 4 h after lights-on. Most adult mating was observed during the scotophase, although some occurred within 2 h after lights-on. However, the adults did not copulate on the day of emergence. The mating rate increased with adult age: being higher in the 4-d-old adult pairs than pairs of lower age. Most of the antennectomized males or females did not copulate with normal individuals of the opposite sex.
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