Without residual, timing must be precise. Sprays such as Peak, Striker and Patriot are only some of the herbicides that can prevent you from rotating into crops ranging from sugar beets to vegetables. Ultim can injure corn in hot weather. Accent is safer, but also more expensive. Herbicide-resistant programs tend to have exceptional crop safety.
Every herbicide has a hole.
Basagran is weak on tall pigweed. Reliance is weak on nightshade. Find out the details of weed control, including when weeds are most sensitive. Some sprays are volatile. Non-selective herbicide resistant programs, such as Roundup Ready and Liberty Link, will kill any crop not protected with their genes.