| 摘要 |
PURPOSE:To obtain the titled agent capable of effectively controlling blast of rice plant, etc., by using a specific sulfonamide derivative or its salt as an active component. CONSTITUTION:The objective agent contains the compound of formula I {X is group of formula II [R<1> is H, alkyl, hydroxymethyl, CF3, phenyl, OR<5>, COOR<6> (R<5> and R<6> are H or alkyl), etc.; R<2> is H, halogen, alkyl, COOH or OR<5>] or R<3>CO- (R<3> is alkyl, alkoxy, amino, alkoxycarbonylethoxy, CH2=CHCH2O-, etc.); Y is H, salt-forming metal or alkyl; Z is alkyl or group of formula IV [R<4> is H, alkyl, alkoxy, halogen, CF3 or NR<7>R<8> (R<7> is H or alkyl; R<8> is H, alkyl or COR<9>; R<9> is alkyl, alkoxy, CF3, etc.)]} or its salt as an active component. The controlling agent is applied e.g. by scattering to the water surface of seedling box, paddy field or plowed land, etc., or surface of soil or mixing to soil.
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