Temperature treatment of Douglas-fir seeds to control the seed chalcid Megastigmus spermotrophus Wachtl von Ruth, D.S, Hedlin, A.F

Volltext

Damage by two Douglas-fir cone and seed insects: correlation with cone crop size von Miller, G.E, Hedlin, A.F, Ruth, D.S

Volltext

Chemical lure for male Douglas-fir cone moth, Barbara colfaxiana (Lepidoptera: Olethreutidae) [Pseudotsuga menziesii] von Hedlin, A.F, Weatherston, J, Ruth, D.S, Miller, G.E

Volltext

Chemical and field studies on the sex pheromones of the cone and seed moths Barbara colfaxiana and Laspeyresia youngana von Weatherston, J., Hedlin, A. F., Ruth, D. S., MacDonald, L. M., Leznoff, C. C., Fyles, T. M.

Volltext