Fungicidal compositions based on nicotinic derivatives

A nicotinic compound of formula:

• ##STR14## in which:
• A is a thiazolyl radical having one of the formulae:
• ##STR15## in which R.sub.1 and R.sub.2, which may be identical or different, are:
• either a hydrogen atom,
• or a linear or branched alkyl or alkenyl radical having 1 to 18 carbon atoms, unsubstituted or substituted with a phenyl or phenoxy in which the phenyl ring can be substituted with one to five substituents selected from the group consisting of a halogen atom and an alkyl or alkoxy radical having 1 to 4 carbon atoms,
• or a phenyl radical, unsubstituted or substituted with one to five substituents selected from the group consisting of a halogen atom and an alkyl or alkoxy radical having 1 to 4 carbon atoms,
• or a pyridyl or thienyl radical,
• or an amino group, unsubstituted or substituted with at least one alkyl or alkoxy radical having 1 to 4 carbon atoms, phenylaminocarbonyl radical, alkylcarbonyl radical or phenylcarbonyl radical in which the phenyl is unsubstituted or substituted with one to five substituents selected from the group consisting of a halogen atom and an alkyl or alkoxy radical having 1 to 4 carbon atoms,
• Z is a methylene radical,
• m is an integer from 1 to 4,
• Y is a halogen atom or an alkyl or alkoxy radical having 1 to 4 carbon atoms, and
• n is an integer from 0 to 3.