Abstract
AbstractIn red beet (Beta vulgaris L. var. conditiva) the main degradation product of added nitrapyrin [2‐chloro‐6‐(trichloromethyl)‐pyridine] has been shown to be 2‐chloro‐6‐(dichloromethyl)‐pyridine. The distribution of these two compounds in beet was also studied. The highest content of nitrapyrin residues (dry weight) was found in the root tips and the petioles; the peel contained more than the leaf laminae or other parts of the root. The higher the nitrapyrin content, the higher was the ratio of nitrapyrin to its dechloro form. No clear linear correlation was observed between the content of nitrapyrin and its dechloro form. The amounts of nitrapyrin residues in beet treated with Ca(NO3)2 were smaller than in the respective samples of beet fertilised with urea or NH4NO3.
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