| abstract |
Derivatives having the formulan or an agriculturally acceptable acid addition salt thereof, wherein R is lower alkyl orn R, is hydrogen or lower alkyl; X and Y independently equal hydrogen, lower alkyl, lower alkoxy or halogen; n is 0, 1, or 3; A isn R: is hydrogen or methyl; R 3 is hydrogen or halogen; R 4 is hydrogen, methyl or phenyl; Z is oxygen or sulfur; provided that when n is 1 and A isn R, cannot equal ethyl and when n is 1 and A isn R 1 cannot equal n-propyl or isobutyl, further provided that when n is 0 A cannot equaln have been found to reduce herbicidal injury to crop plants due to thiocarbamate and acetanilide herbicides. |