Herbicidal compositions of bipyridylium quaternary salts and emetic amounts of s-triazolo pyrimidine derivatives

A herbicidal composition of reduced health hazard comprising a herbicidally effective salt of a herbicidal bipyridylium quaternary cation and an effectively emetic amount of a s-triazolo pyrimidine derivative of the formula:

• ##STR6## wherein R.sup.1 is hydrogen, a C.sub.1-4 alkyl radical, or a COOEt radical;
• R.sup.2 is a C.sub.1-4 alkyl radical or an allyl radical, and R.sup.3 is a C.sub.1-4 alkyl radical, or a pharmaceutically acceptable emetically active addition salt thereof.