A simple and inexpensive non-destructive trap to catch insects as they ascend tree boles is described. The trap was tested in a capture—mark—recapture experiment on the Warren root collar weevil, Hylobius warreni Wood. A high percentage (77%) of marked H. warreni were recaptured at least once during a 12-day period and 54% were recaptured more than once, with one weevil recaptured eight times.
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