NICOSULFURON, PRIMISULFURON, IMAZETHAPYR, AND DPX-PE350 INJURY TO SUCCEEDING CROPS

Nicosulfuron (50 and 100 g ai ha-1), primisulfuron (40 and 80 g ai ha- 1), imazethapyr (70 and 140 g ai ha-1), and DPX-PE350 (100 and 200 g a i ha-1) injury to com, cotton, grain sorghum, rice, and soybean was ev aluated at Fayetteville, AR, during 1989-90 and 1990-91. The crops wer e planted 0, 1, 2, 4, 8, 14 or 16, and 52 wk after herbicide applicati on. Visible injury to all crops declined as the time interval increase d. No visible injury was observed to any crop planted at least 14 wk a fter nicosulfuron or primisulfuron application, or 52 wk after DPX-PE3 50 application. Imazethapyr injured all crops except soybean at the 52 -wk interval in 1990 but not in 1989.