Traps baited with 5 virgin ♀ Synanthedon pictipes (Grote and Robinson) recovered 28.3% released ♂ (80% of those caught); traps baited with 1 ♀ caught 7.1% released ♂ (20% of those caught). Each female in either case was equally attractive, attracting 20% of the recorded catch. Traps made with a hardboard base that supported 2 hardware-cloth wings, and covered with a hardboard roof, captured 1.8 times more ♂ moths than 1-gal carton traps, when each was baited with 5 ♀/trap.
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Buriff et al. (1974) studied this question.