The mode of action and weed spectrum of metribuzin (sencor®) is similar to that of atrazine and simazine. However, its crop tolerance and fate in soils are much different. Early metribuzin injury is generally cosmetic and will not affect yield. Several soybean varieties are sensitive to metribuzin (consult seed dealer for specific varieties). Shallow planting, environmental conditions (cool, wet soils after planting), high soil pH, and coarse soils with low organic matter increase the likelihood of metribuzin injury. Metribuzin may have an additive effect to triazine carryover.

Bentazon (Basagran®) postemergence does not normally cause significant injury to soybean. However, applications made in combination with other herbicides, specific additives, or when air temperatures and relative humidities are high may result in some injury. The symptoms include leaf bronzing or browing with possible spot burn. The injury is cosmetic and there are no yield responses. New tissue will not be affected.