Experiment 1: Habitat Type. Habitat selection
seemed to have an effect on trapping results using thestandard woodborer lure (-pinene and ethanol) with
the addition of Ips pheromones (Allison et al. 2001, de
Groot and Nott 2004). In all cases, scolytid and cerambycid
abundance and species richness was higher
in disturbed habitats compared with the closed canopy
hardwood stand and closed canopy stand. Of the
12 species abundant enough to analyze, average
catches were higher in at least one of the thinned
habitats. In general, traps in the hardwood habitat and
closed canopy stand caught similar number of scolytids
and cerambycids, but they were lower than catches
in both thinned habitats. A larger number of unique
species, a variable especially relevant for exotic species
surveys, were captured in the two thinning treatments.
Although average trap catches in thinned habitats
were often much larger than those from the
hardwood or closed canopy habitats, care must be
taken in interpreting these results. Because it was not
possible to replicate this experiment in more stands,
results are speciÞc to these four habitats.