Field pansy (Viola rafinesquii Greene) control in no-till fields with fall- and spring-applied herbicides

摘要

Field pansy is a winter annual that has become a problem weed in no-till fields in the central USA. Some of the common preplant burn down herbicide treatments have given poor or erratic control. Field studies were conducted over three years to evaluate herbicides and application timing. Ahead of maize, the more consistent treatments included atrazine with paraquat, mesotrione, isoxaflutole, or simazine, applied in fall or spring. Ahead of soybean, fall applications with both burn down and soil residual activity were usually more effective than spring applications.