Unlike disease and insect pests, which tend to occur sporadically, weeds of some sort will almost certainly be a problem every year. In warm-season turf, winter weeds are highly visible and can be particularly unsightly due to the color of dormant or semi-dormant turf. As a result, pre-emergence or early post-emergence strategies for weed control are popular. The reasoning is simple: control the weeds before they become unsightly. In areas where warm-season species grow, the climate is conducive to winter activities. Therefore, winter weed control is all the more important.

Unfortunately, the wide array of winter-annual weeds that are problematic in warm-season turf usually prevents a single pre-emergence herbicide from providing enough broad-spectrum control for acceptable weed control. As a result, successful weed control usually requires both pre- and post-emergence strategies.

Read the entire story from Grounds Maintenance, our sister web site.