PROBLEM TO BE SOLVED: To provide a new herbicide exhibiting significant herbicidal activity against undesirable plants.SOLUTION: There is provided a heteroaryl sulfonamide compound represented by the formula (I) or a salt thereof. [Q represents a specific thiophene ring R1 to R5 each independently represents H or C1-C6 alkyl T represents halogen or C1-C6 alkyl W represents O or S X represents -O-Y, -S-Z1, -SO-Z2 or -SO2-Z2 Y represents substituted C1-C6 alkyl or substituted C1-C6 alkylcarbonyl Z1 represents H, hydroxyalkyl C1-C6 alkyl or C1-C6 alkoxy C1-C6 alkyl Z2 represents hydroxyalkyl C1-C6 alkoxy or C1-C6 alkoxy C1-C6 alkyl m represents an integer of 0 to 2 and n represents an integer of 0 to 5.]SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】望ましくない植物への著しい除草活性を示す新規な除草剤の提供。【解決手段】式(I)で表されるヘテロアリールスルホンアミド系化合物又はその塩。[Qは特定のチオフェン環;R1~R5は各々独立にH、C1-C6アルキル;Tはハロゲン、C1-C6アルキル;WはO又はS;Xは-O-Y、-S-Z1、-SO-Z2又は-SO2-Z2;Yは置換されたC1-C6アルキル、置換されたC1-C6アルキルカルボニル;Z1はH、ヒドロキシC1-C6アルキル、C1-C6アルコキシC1-C6アルキル;Z2はヒドロキシC1-C6アルキル、C1-C6アルコキシC1-C6アルキル;mは0~2の整数;nは0~5の整数]【選択図】なし
