Substituting 2-amino-4-alkylamino-1,3,5-triazine as herbicide

A substituted 2-amino-4-alkylamino-1,3,5-triazine of the formula (I),

• wherein
• R1 represents methyl;
• or halogen-, cyano-, carboxyl-, carbamoyl-, thiocarbamoyl- or C1-C4-alkoxy-substituted methyl,
• R2 represents hydrogen or C1-C3-alkyl,
• Y represents heterocyclylmethyl heterocyclyloxy;
• substituted heterocyclylmethyl;
• or substituted heterocyclyloxy;
• wherein heterocyclyl is a member selected from the group consisting of furyl, benzofuryl, dihydrobenzofuryl, tetrahydrofuryl, thienyl, benzothienyl, thiazolyl, benzothiazolyl, oxazolyl, benzoxazolyl, thiadiazolyl, oxadiazolyl, pyrazolyl, pyrrolyl, indolyl, pyridinyl, quinolinyl, isoquinolinyl and pyrimidinyl;
• and
• wherein the substituents of the substituted heterocyclylmethyl and substituted heterocyclyloxy are each selected independently from the group consisting of hydroxyl;
• cyano;
• nitro;
• halogen;
• hydroxy-, cyano- or halogen-substituted C1-C6-alkyl or C1-C6-alkoxy;
• halogen-substituted C1-C6-alkylcarbonyl, C1-C6-alkoxycarbonyl, C1-C6-alkylthio, C1-C6-alkylsulphinyl or C1-C6-alkylsulphonyl;
• hydroxyl-, cyano-, nitro-, halogen-, C1-C4-alkyl-, C1-C4-halocenoalkyl-, C1-C4-alkoxy- or C1-C4-halogenoalkoxy-substituted phenyl or phenoxy;
• and halogen-substituted methylenedioxy or ethylenedioxy, and
• Z represents hydrogen;
• C1-C6-alkyl;
• C1-C6-alkylcarbonyl;
• C1-C6-alkoxycarbonyl;
• C1-C6-alkylsulphinyl;
• C1-C6-alkylsulphonyl;
• C2-C6-alkenyl;
• C2-C6-alkynyl;
• hydroxyl-, cyano-, nitro-, halogen-, C1-C4-alkoxy-, C1-C4-alkylcarbonyl-, C1-C4-alkoxycarbonyl-, C1-C4-alkylthio-, C1-C4-alkylsulphinyl- or C1-C4-alkylsulphonyl-substituted C1-C6-alkyl, C1-C6-alkylcarbonl, C1-C6-alkoxycarbonyl C1-C6-alkylsulphinyl or C1-C6-alkylsulphonyl;
• or halogen-substituted C2-C6-alkenyl or C2-C6-alkynyl.