Quackgrass (Elytrigia repens) Control in Corn (Zea mays) with Nicosulfuron and Primisulfuron

摘要

Quackgrass is a serious weed problem in the northern United States and southern Canada. Field experiments were conducted in 1990 and 1991 to examine the effect of herbicide rate, appli- Cation timing, quackgrass growth stage, and cultivation on quackgrass control with nicosulfuron and Primisulfuron in corn. Nicosulfuron (35 g ai/ha) and primisulfuron (40 g ai/ha) each provided 84/100 Or greater control of two-leaf plants and 93/100 or greater control of four-leaf quackgrass plants. Sequential applications of both nicosulfuron and primisulfuron provided greater season-long control Than single applications of the same rate on two-leaf bot not four-leaf quackgrass.