Abstract
Newly emerged Scolytus quadrispinosus Say were collected by tanglefoot-coated barriers during flight to crowns of paired, healthy host and nonhost trees ( Carya ovata (Mill.) K. Koch and Quercus alba L., respectively). As weekly collections were comparable in both tree species, the dispersal flight apparently was random with respect to both tree species, This phenomenon indicated that the host specificities of S. quadrispinosus for maturation feeding were not governed by attractants peculiar to healthy, host tissues.
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