N-aryltetrahydrophthalimide compounds of the general formula I ##STR1## where is --S--C(R).sub.2 --, and a method for controlling undesirble plant growth.
This is a continuation of application Ser. No. 07/761,187, filed Sep. 17, 1991, now U.S. Pat. No, 5,213,605, which is a division of Ser. No. 07/464,639, filed Jan. 5, 1990, now U.S. Pat. No. 5,080,760, which is an FWC of Ser. No. 07/315,128, filed Feb. 24, 1989, abandoned.