Mite populations on grapes: Effect of sulfur dust treatments on predatory mites and red spider mite
California Agriculture 4(3):13-14.
Published March 01, 1950
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The annual rise and fall of populations of the Pacific mite—Tetranychus pacificus McG—and the Willamette mite— Tetranychus willamettei McG—on grapes has puzzled growers and entomologists for years. In the fall of 1949 the last explanatory link was supplied.