| 摘要 |
<p>The present ivnention relates to a partially hydrogenated or completely hydrogenated 1,3,5-triazine derivative which has (i) a group of formula (a), wherein Q1 represents an aromatic ring group which may optionally be substituted; R1 represents a hydrogen atom or a hydrocarbon group which may optionally be substituted; R2 represents a hydrocarbon group which may optionally be substituted or R?1 and R2¿ may form a ring together with the adjacent carbon atom wherein the ring may optionally be substituted, at the 1-position, and (ii) oxo groups or thioxo group at the 2-position, and (iii) which may have a substituent at each 3- to 6-position, provided that said triazine derivative does not have oxo group at both the 4- and 6-positions, or a salt thereof; a process for its production; and a composition. The compound or a salt thereof has potent herbicidal activity against a broad spectrum of weeds including paddy field weeds and plowed land weeds at low concentrations. Furthermore, it is less phytotoxic to crop plants such as rice, wheat, barley, soybean, and corn plants, thus having very satisfactory selective herbicidal activity. Moreover, this selective herbicidal action lasts long. In addition, the compound or salt which does no substantial harm to mammalian animals, fishes and shellfishes, is free from the pollution problem, and can be used very safely as a herbicide in paddy fields, plowlands, orchards, and non-crop lands.</p> |
