The 4 possible cross-matings of Douglas-fir beetles, Dendroctonus pseudotsugae Hopkins, from 2 localities (Idaho and coastal Washington) all produced fertile offspring. However, there were significant differences in the number of progeny among the various crosses, and also between the sources of trees used for the tests. It is recommended that matings of Douglas-fir beetles from more widely separated areas, and possibly with other, closely related species, be made to determine whether sterility can be induced in wild populations.
No takes yet. Share an insight, caveat, or question.
Johnson et al. (1967) studied this question.