Cereal grains and Peak 75WG seeded More persistent in high pH prosulfuron 2 9-152 sorghum are labeled, (Spirit) legumes, mustards soils grasses Cereal grains and seeded Permit/Sandea 75DF halosulfuron 2 9-27 sorghum after 2 mo. legumes, mustards and other grasses More persistent in drought Prism rimsulfuron 2 2-4 None conditions Cereals, ryegrass, Simazine simazine 5 60 Sorghum species legumes, and Soil pH > 7 (Princep 9-T) mustards Table 2. Common soybean herbicides, their half lives, and potential to injure fall-seeded cover crops. Half Life Cover Crops Cover Crops Herbicide Common name Group # (days)* (OK to Plant) (Concern For) OK to most Concern for all Plant anything broadleaves grasses if less than after 120 days Assure II quizalofop 1 60 120 days or at high Winter rye and More persistent in chlorimuron + somewhat on oats, high pH soils (> 7) Canopy Pro 2, 5 40 metribuzin small seeded and with higher soil applied rates
Peak 75WG (Spirit) prosulfuron 2 9-152 Cereal grains and sorghum are labeled, grasses seeded legumes, mustards More persistent in high pH soils Permit/Sandea 75DF halosulfuron 2 9-27 Cereal grains and sorghum after 2 mo. and other grasses seeded legumes, mustards Prism rimsulfuron 2 2-4 None More persistent in drought conditions Simazine (Princep 9-T) simazine 5 60 Sorghum species Cereals, ryegrass, legumes, and mustards Soil pH > 7 Table 2. Common soybean herbicides, their half lives, and potential to injure fall-seeded cover crops. Herbicide Common name Group # Half Life (days)* Cover Crops (OK to Plant) Cover Crops (Concern For) Assure II quizalofop 1 60 OK to most broadleaves Concern for all grasses if less than 120 days or at high Plant anything after 120 days Canopy Pro chlorimuron + metribuzin 2, 5 40 Winter rye and somewhat on oats, small seeded More persistent in high pH soils (> 7) and with higher soil applied rates