Onion Thrips (Thysanoptera: Thripidae) Damage and Contamination in Sauerkraut1

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Abstract
Studies conducted to determine Thrips tabaci Lindeman damage and contamination in sauerkraut revealed that both occur at detectable levels in processed cabbage, although such levels are much lower than predicted from examination of fresh cabbage. Addition of the chemical preservatives sodium benzoate (0.1%) and potassium metabisulfite (0.05%) had no effect on plant tissue damage or insect contamination. Although tolerance levels for insect contamination in many other vegetables have been established, the FDA has not established such a tolerance for insect contaminants in sauerkraut. To avoid discretionary seizure, and in light to these findings on this newly important pest of cabbage, guidelines should be established for plant injury and insect tolerances.

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