Combating fungi with 2-methylene-3-substituted-4,5-bis-trifluoromethyl-imino-thiazolidines

A compound of the formula ##STR52## in which R.sup.1 represents aryl with up to 10 carbon atoms or aralkyl with up to 10 carbon atoms in the aryl part and 1 or 2 carbon atoms in the alkyl part, the aryl radicals mentioned being optionally substituted by halogen, cyano, nitro or alkyl, alkoxy or alkylmercapto with in each case up to 3 carbon atoms, or represents an amino group --NR.sup.4 R.sup.5,

• wherein
• R.sup.4 and R.sup.5 together with the connecting nitrogen atom and optionally one or more further hetero-atoms selected from oxygen, sulphur and nitrogen, form a heterocyclic ring with 5 to 7 ring atoms,
• R.sup.2 represents alkoxycarbonyl with up to 4 carbon atoms in the alkyl part, and
• R.sup.3 represents hydrogen, cyano or alkoxycarbonyl with up to 4 carbon atoms in the alkyl part and which can be optionally substituted by an alkoxy or alkylmercapto group with up to 3 carbon atoms, or represents an acyl group with a total of up to 10 carbon atoms, alkylsulphonyl with up to 6 carbon atoms or arylsulphonyl with up to 10 carbon atoms in the aryl part, which aryl part is optionally substituted by alkyl with up to 3 carbon atoms and/or nitro and/or halogen, or represents an amide or thioamide group comprising the radical CO--NR.sup.6 R.sup.7 or CS--NR.sup.6 R.sup.7,
• in which
• R.sup.6 represents hydrogen or alkyl with up to 4 carbon atoms, and
• R.sup.7 represents alkyl with up to 6 carbon atoms, cycloalkyl with 5 or 6 carbon atoms or phenyl, which phenyl can be substituted by halogen, nitro or alkyl, alkoxy or alkylmercapto with in each ease up to 4 carbon atoms, at least one or R.sup.2 and R.sup.3 representing alkoxycarbonyl.