Differences in susceptibility of soya bean cultivars to metribuzin

Experiments were established in the Coastal Plain, Piedmont, Limestone Valley and Mountain areas of Georgia in 1972. Following pre‐emergence field applications of metribuzin at 0.56, 0.84, 1.12 and 1.68 kg a.i./ha, cv. Semmes was generally more susceptible to injury than were cv. Pickett, Bossier or York. The injury, first manifested as a typical chlorotic response of soya beans to triazine herbicides, caused reduced soya bean stands, heights, harvest yields and seed weights.