No-till practices save soil and offer many other benefits, but soybean producers know there’s at least one big disadvantage: Not tilling gives weeds, particularly problematic marestail, a chance to thrive.
“The biggest challenge we have in no-till soybeans across Ohio and surrounding states is control of glyphosate-resistant marestail in the spring,” said Ohio State University Extension weed specialist Mark Loux.
Marestail emerges in fields from late March through June, and again in late summer through fall. Spring-emerging marestail competes with soybeans throughout the growing season, eventually bolting to a height of 3 to 6 feet, enough to interfere with harvest. It’s more of a problem in the southern two-thirds of the state, though it’s moving north, Loux said.
Loux said a one-two punch is necessary for marestail control in no-till fields: An effective burndown herbicide treatment to ensure planting is done in weed-free fields, and a residual treatment controlling the growth of any new weeds until early to mid-June, when the leaves of the soybean plants are large enough to form a canopy that provides plenty of control.… Continue readingRead More »