An edition of Insects destructive to the Douglas-fir seed crop in California (1960)
Insects destructive to the Douglas-fir seed crop in California
a problem analysis
By Thomas W. Koerber
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Publish Date
1960
Publisher
U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station
Language
eng
Pages
36
Description:
subjects: Douglas fir, Contarinia, Seeds, Torymidae, Dioryctria, Tortricidae, Diseases and pests, Seed pathology
Places: California