| 2,4-D 4E or S (LVE or amine) |
1–4 pt |
0.5–2.0 |
Delay application until grasses are well established, usually 4–5 inches tall, and do not treat in the boot to milk stage. Broadleaf weeds should be actively growing. Use higher rates for less susceptible species and for perennials. Treat biennials in the rosette stage of growth and perennials such as Canada thistle in the bud stage. Treat susceptible woody perennials in spring after leaves are fully expanded. Be cautious of drift. |
| Cimarron Plus 63DF (metsulfuron + chlorsulfuron) |
0.125–1.25 oz |
0.08–0.8 oz |
Apply to grasses that are established for at least 6 months. For timothy, a minimum of 12 months is desirable and 24 months for fescue. Apply to weeds in the spring or early summer before annual broadleaves are 4 inches tall. For multiflora rose, Canada thistle, or blackberry, spot treat at 1 oz/100 gal of water and spray foliage until runoff. Include a nonionic surfactant at 1–2 pt/100 gal. unless applying in liquid fertilizer. Ryegrass is less tolerant than other grass species. Do not apply to desirable legume-containing stands. Cimarron is persistent in soil, and crop rotation guidelines must be followed. Cimarron Max is a co-pack that contains the active ingredients of Cimarron and 2,4-D plus dicamba, while Cimarron Plus contains the active ingredients of Cimarron and chlorsulfuron (Glean, Telar). |
| Clarity 4S/Banvel 4S (dicamba) |
0.5–2.0 pt |
0.25–1.0 |
Delay application until grasses are well established, usually 4–5 inches tall. Use the lower rates for susceptible annuals when they are small and actively growing. Treat biennials in the rosette stage of growth. Higher rates may be used for spot treatment of certain woody brush species. Be cautious of drift. |
| Crossbow 3E (2,4-DLVE + triclopyr) |
1–6 qt |
0.75–4.5 |
Apply when brush and broadleaved weeds are actively growing. Use higher rates for less susceptible species. When applying as a spot treatment, spray foliage to wetness. See the herbicide label for specific rate and timing information. Be cautious of drift. (Water quality advisory) |
| Metsulfuron 60DF (metsulfuron-methyl) |
0.1–0.4 oz |
0.06–0.24 oz |
Apply to grasses (e.g., orchard, brome, bluegrass) that are established for at least 6 months. For timothy, a minimum of 12 months is desirable; 24 months for fescue. Apply to weeds in the spring or early summer before annual broadleaves are 4 inches tall. For multiflora rose, Canada thistle, or blackberry, spot treat at 1 oz/100 gal of water and spray foliage until runoff. Include a nonionic surfactant at 1–2 pt/100 gal unless applying in liquid fertilizer. Ryegrass is less tolerant than other grass species. Do not apply to desirable legume-containing stands. Metsulfuron is persistant in soil, and crop rotation guidelines must be followed. DuPont is no longer selling metsulfuron (Cimarron) as a single active ingredient in the pasture market. However, generics such as Accurate, Purestand, and others are equivalent products (see Table 2.2-1b for other products). Cimarron Max is a copack that contains the active ingredients of Cimarron and 2,4-D plus dicamba, with Cimarron Plus contains the active ingredients Cimarron and chlorsulfuron (Glean, Telar). |
| Milestone 2E (aminopyralid) |
3–7 fl oz |
0.047–0.109 |
For control of susceptible broadleaf weeds in permanent grass pasture. In general, it is best to wait about 45–60 days after grass planting before applying these herbicides. Grass can be overseeded the fall after a spring treatment. Wait at least 4 months after application to overseed forage legumes. These products can be tank-mixed with metsulfuron or other pasture herbicides to broaden weed control spectrum. Do not use Milestone or ForeFront if loss of desirable legume species cannot be tolerated. Do not allow spray drift to come in contact with any broadleaf crop or other desirable broadleaf plant. Do not rotate to any crop within one year following treatment, or to any broadleaf crop until an adequately sensitive field bioassay shows that the aminopyralid level in soil will not adversely affect that broadleaf crop. Cereals and corn can be planted 1 year after treatment; most broadleaf crops require at least a 2-year wait until planting. Do not use aminopyralid-treated plant residues or manure from animals that have consumed forage or hay from treated areas, as compost or mulch in areas where susceptible broadleaf crops may be grown. There are no restrictions on grazing following Milestone or ForeFront applications. The addition of a non-ionic surfactant at 0.25–0.50% by volume is recommended to enhance herbicide activity under adverse environmental conditions. See label for additional use information. |
| or ForeFront HL 3.74E (aminopyralid + 2,4-D) |
1.2–2.1 pt |
0.56–0.98 |
| Overdrive 70WDG or Distinct 70WG (dicamba + diflufenzopyr) |
4–8 oz |
0.175–0.35 |
Apply to grass pastures to control broadleaves postemergence. Do not apply to newly seeded grasses. Include a nonionic surfactant (1 qt/100 gal.) or methylated seed oil (1.5–2 pt/A) in the spray solution. Tank mix with other pasture herbicides to broaden control spectrum. Pasture may be grazed or harvested for livestock feed immediately after application. Some leaf burn may occur on certain forage grasses (orchardgrass, timothy) especially with spring applications. |
Roundup 3S/Roundup WeatherMax 4.5S/glyphosate
|
2% solution (spot treat) |
|
Roundup/glyphosate may be used as a spot treatment. Do not treat more than 10% of any acre. Further applications may be made at 30-day intervals. Spray foliage uniformly until wet, but not to the point of runoff. Avoid contact with desirable vegetation. |
| Spike 20P (tebuthiuron) |
10–20 lb |
2–4 |
For control of brush and woody species in grass pasture. For multiflora rose control, apply Spike in early spring after ground thaw and before multiflora rose growth. Requires rainfall to move herbicide to root zone. May kill or injure desirable legumes or grasses where contact is made. Grass injury is minimized by applying during dormant season. Spike is persistent in soil. Refer to a current herbicide label for specific application instructions. (Water quality advisory) |
| Stinger 3S (clopyralid) |
0.66–1.3 pt |
0.25–0.50 |
For Canada thistle, apply after thistle is at least 4 inches tall, but before the bud stage. Do not treat desirable crops such as alfalfa or clover. Do not use hay or straw from treated areas for composting or mulching in areas where susceptible broadleaf crops may be grown. See label for additional use information. (Water quality advisory) |
