Sunlight plays a minor role in sulfonylurea losses. If the active ingredient stay unprotected on the soil surface, a relatively small portion of the herbicide may be lost due to ultraviolet degradation. Water and soil pH is very important. Sulfonylurea activity is largely determined by soil clay and organic matter. Greater clay and organic matter require a higher dose.
Sulfonylureas exhibit a wide range in crop and weed sensitivities.
Plant-back restrictions that vary with region and crop species. Lack of herbicide rotation or tank-mixing can encourage resistant weeds. Plant injury symptoms. Affected plants exhibit chlorosis, necrosis, stunting, epinasty and shortening of internodes. Sulfonylureas kill germinating seedlings.