Compounds having the formula ##STR1## in which R.sub.1 -R.sub.4 are each independently selected from the group consisting of hydrogen and alkyl having 1-4 carbon atoms protect corn from thiolcarbamate herbicidal injury.
Compounds having the formula ##STR1## in which R.sub.1 -R.sub.4 are each independently selected from the group consisting of hydrogen and alkyl having 1-4 carbon atoms protect corn from thiolcarbamate herbicidal injury.