In field experiments conducted near Marianna, Trenton, and Archer, FL
in 1990 and 1991, nicosulfuron applied 55 weeks after planting (WAP) a
t 18, 27, 36, or 54 g ai/ha injured peanut initially. When applied 7 W
AP, only the two higher nicosulfuron rates injured peanut more than 10
%. By 6 wk after application, crop injury was less than 8% for all tre
atments, except the highest (54 g/ha) rate. Nicosulfuron applied 5 or
7 WAP at 54 g/ha reduced peanut yield and sound mature kernels.