S-triazines as sugarcane ripeners

A process for modifying the ripening of sugarcane plants so as to increase their yield of sucrose which comprises applying an s-triazine in a sucrose increasing amount directly to the cane plants as hereinafter specified at a time from about 2-10 weeks prior to harvest;

• said s-triazine having the formula ##STR6## (a) in which R is EtNH--, R' is --N(CH.sub.2 COOMe).sub.2, and the sugarcane variety is CL-59-1052 or CL-41-223;
• (b) in which R is EtNH--, R' is --N(CH.sub.2 CONH.sub.2).sub.2, and the sugarcane variety is CL-59-1052;
• (c) in which R is EtNH--, R' is --HNCH.sub.2 COOEt, and the sugarcane variety is CL-59-1052;
• (d) in which R is EtNH--, R' is --N(CH.sub.2 COOH).sub.2, and the sugarcane variety is CL-59-1052;
• (e) in which R is iPrNH--, R' is --HNCH.sub.2 COOH, and the sugarcane variety is CL-59-1052;
• (f) in which R is iPrNH--, R' is --N(CH.sub.2 COOBu).sub.2, and the sugarcane variety is CL-59-1052;
• (g) in which R and R' are --N(CH.sub.2 COOH).sub.2, and the sugarcane variety is CL-59-1052;
• or
• (h) in which R and R' are --N(CH.sub.3)CH.sub.2 COOH, and the sugarcane varieties are CL-59-1052 or CL-41-223.