There is a point early in the growing season when weeds can begin to harm soybean yield, which university experts call the critical period of weed control.
The critical period is when weeds start to compete for valuable resources soybeans need to grow strong. Consequently, weeds become a threat to yield. Controlling weeds early in the season with a preemergence herbicide, starting before the critical period, is fundamental to protect your customers’ crops and their profits.
Growers can stay a step ahead of tough weeds such as waterhemp and marestail by using a preemergence herbicide with residual control. Waterhemp and marestail are two of the most troublesome weeds in the Midwest, but by understanding their germination patterns and controlling them early, growers can better protect their yield.
Waterhemp is an aggressive, small-seeded summer annual that can germinate and emerge late in the growing season. It has developed widespread herbicide resistance and is highly competitive, a difficult combination for soybean growers.
Marestail is an annual broadleaf weed that causes the most trouble in reduced or no-till situations. It grows quickly and can rapidly consume a field. Marestail typically has been recognized as a winter annual; however, in recent years, its germination pattern has changed, and it now can germinate eight to nine months out of the year, interfering with crops during peak growing season.
To control these difficult weeds before the critical period of weed control, use Sonic® herbicide preemergence. With two modes of action and residual control, Sonic controls yield-robbing weeds at planting and into the growing season.
Learn more at BattleWeeds.com or by contacting your local Dow AgroSciences sales representative.