Further insecticide tests against the Douglas-fir needle midges, Contarinia spp.

D. A. Ross, J. C. Arrand, N. J. Geistlinger

Abstract


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References


Hoffman, C.H. and E.P. Merkel. 1948. DDT and the arthropod population in forests. J. Econ. Ent. 41:464-473.

Ross, D.A. and J.C. Arrand. 1963. Preliminary insecticide tests against the Douglas-fir needle midges, Contarinia spp., Larkin, B.C., 1962. Proc. B.C. Ent. Soc. 60:32-33.


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