Substituted thiophene derivative and agricultural and horticultural fungicide containing the same as active ingredient

An agricultural and horticultural fungicide comprising, as an active ingredient, a substituted thiophene compound of the formula (1):

• ##STR20## wherein Q is a hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, methyl group, trifluoromethyl group, methoxy group, methylthio group, methylsulfonyl group, methylsulfoxy group, nitro group or amino group;
• R is a straight or branched alkyl group having 1-12 carbon atoms, straight or branched halogenalkyl group having 1-12 carbon atoms, straight or branched alkenyl group having 2-10 carbon atoms, straight or branched halogenoalkenyl group having 2-10 carbon atoms, alkoxyalkyl group having 2-10 carbon atoms, alkylthioalkyl group having 2-10 carbon atoms, cycloalkyl group having 3-10 carbon atoms, halogen substituted cycloalkyl group having 3-10 carbon atoms, or a phenyl group which can be substituted with 1-3 substituents;
• the 1-3 substituents of said phenyl group a hydrogen atom, alkyl group having 1-4 carbon atoms, alkenyl group having 2-4 carbon atoms, alkynyl group having 2-4 carbon atoms, cycloalkyl group having 3-6 carbon atoms, alkoxy group having 14 carbon atoms, halogenalkoxy group having 1-4 carbon atoms, alkylthio group having 1-4 carbon atoms, alkylsulfoxy group having 1-4 carbon atoms, alkylsulfonyl group having 1-4 carbon atoms, halogen atom, cyano group, acyl group having 2-4 carbon atoms, alkoxycarbonyl group having 2-4 carbon atoms, amino group or amino group substituted with alkyl group having 1-3 carbon atoms;
• R and the group --NHCOAr are at adjacent positions on the thiophene ring;
• and Ar is a group of one of the following formulae (A1) to (A8):
• ##STR21## wherein R.sup.1 is a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group, chlorine atom, bromine atom or iodine atom, R.sup.2 is a hydrogen atom, methyl group, trifluoromethyl group or amino group, and n is an integer of 0-2.

A method for controlling plant disease comprising applying a substituted thiophene compound of the formula (1):

• ##STR22## wherein Q is a hydrogen atom, fluorine atom, chlorine atom, bromine atom, iodine atom, methyl group, trifluoromethyl group, methoxy group, methylthio group, methylsulfonyl group, methylsulfoxy group, nitro group or amino group;
• R is a straight or branched alkyl group having 1-12 carbon atoms, straight or branched halogenalkyl group having 1-12 carbon atoms, straight or branched alkenyl group having 2-10 carbon atoms, straight or branched halogenoalkenyl group having 2-10 carbon atoms, alkoxyalkyl group having 2-10 carbon atoms, alkylthioalkyl group having 2-10 carbon atoms, cycloalkyl group having 3-10 carbon atoms, halogen substituted cycloalkyl group having 3-10 carbon atoms, or a phenyl group which can be substituted with 1-3 substituents;
• the 1-3 substituents of said phenyl group are selected from a hydrogen atom, alkyl group having 1-4 carbon atoms, alkenyl group having 2-4 carbon atoms, alkynyl group having 2-4 carbon atoms, cycloalkyl group having 3-6 carbon atoms, alkoxy group having 1-4 carbon atoms, halogenalkoxy group having 1-4 carbon atoms, alkylthio group having 1-4 carbon atoms, alkylsulfoxy group having 1-4 carbon atoms, alkylsulfonyl group having 1-4 carbon atoms, halogen atom, cyano group, acyl group having 2-4 carbon atoms, alkoxycarbonyl group having 2-4 carbon atoms, amino group or amino group substituted with alkyl group having 1-3 carbon atoms;
• R and the group --NHCOAr are at adjacent positions on the thiophene ring;
• and Ar is a group of one of the following formulae (A1) to (A8):
• ##STR23## wherein R.sup.1 is a trifluoromethyl group, difluoromethyl group, methyl group, ethyl group, chlorine atom, bromine atom or iodine atom, R.sup.2 is a hydrogen atom, methyl group, trifluoromethyl group or amino group, and n is an integer of 0-2.