Sulfonylureas of the general formula I
1
where
R
1
is a methyl or ethyl group;
R
2
is C
1
-C
3
-alkoxycarbonyl, a C
1
-C
2
-alkyl group which carries 1 to 5 fluorine atoms, methylsulfonyl, dimethylaminosulfonyl, thiomethyl, methylsulfinyl, methylsulfonyloxy, trifluoromethoxy, difluoromethoxy, difluorochloromethoxy, difluorochloromethyl or nitro;
R
3
is hydrogen, methyl, methoxy, ethoxy, fluorine, chlorine or thiomethyl;
W is hydrogen or chlorine and
Z is CH or N
and their agriculturally utilizable salts are described.
                            通式I1中的磺酰
脲,其中R1为甲基或乙基基团;R2为C1-C3-烷氧羰基,携带1至5个
氟原子的C1-C2-烷基,甲基磺酰基,
二甲氨基磺酰基,
硫甲基,甲基亚磺酰基,甲基磺酰氧基,三
氟甲氧基,二
氟甲氧基,二
氟氯甲氧基,二
氟氯甲基或硝基;R3为氢,甲基,甲氧基,乙氧基,
氟,
氯或
硫甲基;W为氢或
氯,Z为CH或N及其农业可利用的盐被描述。