Fig. 1. The reduction in the attraction of Dendroctonus brevicomis in flight to its aggregation pheromone components exo-brevicomin (E), frontalin (F), and myrcene (M) by an inhibitory pheromone, ipsdienol (Id), as shown by the comparison of daily catch totals on 6 pairs of traps from July 1 to 6, 1980, in the Sierra National Forest, California. The carch totals for treatment and check are shown alternating each day to indicate random placement of ipsdienol.


Byers, J.A. 1982. Male-specific conversion of the host plant compound, myrcene, to the pheromone, (+)-ipsdienol, in the bark beetle, Dendroctonus brevicomis. Journal of Chemical Ecology 8:363-371.

Chemical Ecology