Mite populations on grapes: Effect of sulfur dust treatments on predatory mites and red spider mite

Smith, L

Mite populations on grapes: Effect of sulfur dust treatments on predatory mites and red spider mite

Author

Leslie M. Smith

Author Affiliations

Leslie M. Smith is Associate Professor of Entomology and Associate Entomologist in the Experiment Station, Davis.

Publication Information

Hilgardia 4(3):13-14. DOI:10.3733/ca.v004n03p13. March 1950.

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Abstract

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.

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Marketing: Agreements and orders regulating sales have effect of law

Poultry husbandry report, 1949: Progress report of advances in poultry research conducted during 1949 by the staff of the division

Orange fruit sizes: Potassium applications increase Size Of fruit in long-term fertilizer studies

Inbreeding: Investigations with dairy cattle indicate inbreeding can lead to desirable or undesirable results

Deferred grazing irrigated pasture ungrazed during fall permits plant regrowth

Timing of spray treatments for codling moth: Control on Payne walnuts in northern California influenced by size of nuts when sprayed

Spray residues: On apricots after codling moth sprays, 1950 recommendations

Nitrogen fertilizer: California deciduous fruit orchards respond in variety of ways due to individual conditions

Wind borne pest: Omnivorous leaf tier controlled readily by insecticide treatments

Daily and seasonal air and soil temperatures at Davis, California