Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season

H Madsen

Chemicals on European red mite: Two different methods of evaluation of spray materials for spider mite control used in field tests during 1957 season

1958

H Madsen

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.

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