Window flight traps baited with ethanol attracted 15 genera representing 25 species of scolytids. Monarthrum fasciatum and Xyleborus saxeseni were the most frequently trapped scolytids. Evidence for seasonal flight periods and vertical flight distribution are presented for Hypothenemus dissimilis , X . ferrugineus , X . saxeseni , X . sayi , X . xylographus , M . fasciatum , M . mali , and Corthylus columbianus . Live Q . velutina injected with ethanol attracted five species of scolytids: X . saxeseni , X . xylographus , M . fasciatum , M . mali , and C . columbianus .
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Ruling et al. (1975) studied this question.
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