Efficacy and Residual Duration Trial – 1998

Laboratory Trial A laboratory colony of pine regeneration weevils (pales, Hylobius pales, and pitch-eating, Pachylobius picivorus) was established during the winter of 1997-98. Weevils were collected once a week using pit traps baited with a 5:1 mix of ethanol and turpentine and set up in recently harvested tracts. In the laboratory, collected weevil species were maintained separately in clear plastic boxes containing a layer of vermiculite, split bolts and foliage.