Apparent Meteorological Requirements for Abundant Cone Crop in Douglas-Fir

By Lowry William P.  

Forest Science, Vol. 12, Iss. 2, 1966-06 ,pp. : 185-192

Society of American Foresters

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Damage to the Seed of Douglas-Fir by the Douglas-Fir Cone Midge

By Johnson Norman E.   Heikkenen H. J.  

Forest Science, Vol. 4, Iss. 4, 1958-12 ,pp. : 274-282

Society of American Foresters

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Disease of Douglas-Fir Seeds During Cone Storage

By Bloomberg W. J.  

Forest Science, Vol. 15, Iss. 2, 1969-06 ,pp. : 176-181

Society of American Foresters

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Douglas-Fir Orchards: Managing Cone and Seed Insects

By Zhang Yanli   Schowalter Timothy D.  

Journal of Forestry, Vol. 95, Iss. 3, 1997-03 ,pp. : 28-32

Society of American Foresters

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Time of Attack of the Douglas-Fir Cone Midge in Relationship to Cone Development

By Johnson Norman E.  

Journal of Forestry, Vol. 61, Iss. 5, 1963-05 ,pp. : 350-355

Society of American Foresters

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