Byers, J.A. 1988. Novel diffusion-dilution method for release of
semiochemicals: Testing pheromone component ratios on western pine
beetle. Journal of Chemical Ecology 14:199-212.
Byers, J.A. 1993. Orientation of bark beetles Pityogenes chalcographus
and Ips typographus to pheromone-baited puddle traps placed in
grids: A new trap for control of scolytids. Journal of Chemical Ecology