Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season
Harold F. Madsen, University of California
California Agriculture 12(2):8-15. DOI: 10.3733/ca.v012n02p8.
Abstract Not Available – First paragraph follows:
Variable conditions in the fruit growing areas of California make it difficult to project the results from evaluation tests in one area to another. As a consequence, field plots were established for the 1957 season in Bartlett pear orchards—in Sacramento, Solano, El Dorado, Lake, and Mendocino counties—for University personnel to evaluate spray materials under local conditions. As a correlative evaluation, spray chemicals used in codling moth and aphid control plots were checked for their effects on spider mites.
Harold F. Madsen is Assistant Entomologist, University of California, Berkeley.
Gordon Morehead, Sacramento County, Jim DeTar, Solano County, Dick Bethell, El Dorado County, Russell Gripp, Lake County, and Bruce Bearden, Mendocino County; Farm Advisors, University of California, cooperated in trials with Bartlett pears.