RESPONSE OF SWEET CORN (ZEA-MAYS) CULTIVARS TO NICOSULFURON PLUS RIMSULFURON

Sixteen sweet corn cultivars, representing a range of endosperm genoty pes, were evaluated to determine cultivar tolerance to nicosulfuron pl us rimsulfuron in greenhouse and field studies conducted over a two-ye ar period. Response to nicosulfuron plus rimsulfuron varied widely, de pending on cultivar and application rate. In the field, four cultivars were tolerant to applications of nicosulfuron plus rimsulfuron at rat es of 50 g/ha. In the greenhouse, eight cultivars were tolerant to nic osulfuron plus rimsulfuron at 25 g/ha. 'Merit' and 'Silver Extra Sweet ' were most sensitive, with applications of nicosulfuron plus rimsulfu ron resulting in death of all plants. 'Miracle,' 'Extra Early Super Sw eet,' 'Bunker Hill,' and 'Sweet Belle' were tolerant.