by California. State Commission of Horticulture.
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The pear thrips (Euthrips pyri)
California citrus culture
Fungi and fungicides
Insects and insecticides
Apple growing in California
A fruit fly menace (ceratitis capitata)
Residue reviews
Silent Spring
[Preservation of forests.]
Pesticides
Federal-grant research at the state agri...
A Text-book on Roofs and Bridges