Suppression of Lepidopterous Larvae in Commercial Sauerkraut Cabbage Fields and Research Plots1

Abstract
Parathion and Bacillus thuringiensis Berliner were the most frequently used insecticides in commercial sauerkraut cabbage fields by growers in New York for suppression of lepidopterous larvae. Growers also used combinations of chemicals more frequently than expected. Percent reduction of larvae in commercial fields could not be equated with percent control in research plots because untreated controls were not available in commercial plantings. Even when consistent performers (i.e., permethrin and methamidophos) were used, some larvae survived in the research plots and sauerkraut fields.

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