Metabolism of Pencycuron

The metabolic fate of pencycuron in rice plants has been investigated with [phenyl-U- C]pencycuron [11]. When leaves were treated with [ C]pencycuron the radiocarbon gradually penetrated into the leave tissues and part of them showed an acropetal movement. Most radiocarbon was, however, retained on the leave s surface. Pencycuron remained as a major component (52% of the applied 

56 ppm as a peaiqrcuron equivalent, but the radiocarbon was mainly located in the bran (85%). Intact pencycuron was detected at 0.018 ppm in hulled rice and 0.003 ppm in polished rice. Radiocarbon in grains remained as an unextractable bound residue. 

Ueyama, S. Kurogochi, Y. Yamada, J. Schneider-Christians, Abstract of 5th International Congress of Plant Pathology, p. 22, 1988. Ueyama, Y. Araki, S. Kurogochi, 

Leroux, V. Droughot, M. Gredt, Abstract of 7th International Congress of Pesticide Chemistry, p. 348, 1990. 

Yamaguchi, Abstract of 18 Pesticide Science Society Meeting of Japan, p. 73,1993. 

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