Table 2.5-3. Characteristics of "burndown" herbicides for no-till small grains
| Herbicide¹ | Rate/A | lb ai/A | Comments |
|---|---|---|---|
|
|||
| Clarity 4S/Banvel 4S (dicamba) | 4 fl oz | 0.125 | May apply before, during, or after planting for control of emerged and actively growing weeds. The 4 fl oz rate controls small annual broadleaf weeds and there is no waiting period prior to planting at this rate. Clarity/Banvel may be used at greater than 4 fl oz prior to planting wheat; however, for each pt/A of Banvel applied, delay crop planting for 20 days. |
| Gramoxone SL 2S (paraquat) | 2–4 pt | 0.5–1.0 | Apply in 20–60 gal/A for control of emerged annual weeds. Add 8–32 oz nonionic surfactant/100 gal of spray. Phosphate-containing liquid fertilizer solutions diminish paraquat activity if used as a carrier. Use appropriate precautions when handling paraquat to minimize exposure to the herbicide. Do not use flood jet tips larger than size 20 or spacing greater than 40 inches. (Gramoxone is a restricted-use pesticide.) |
| Harmony Extra SG 50DF | 0.45–0.9 oz | 0.014–0.028 | For use in wheat, barley, and oat. Apply burndown treatment before or shortly after planting but before small grain emergence. |
| Roundup 3S1/glyphosate or Roundup Weathermax 4.5S |
1–3 qt 22–70 fl oz |
1–3 | Apply before, during, or after planting but before crop emergence. Use the low rate for annual weeds up to 6 inches tall and higher rates for weeds taller than 6 inches. |
| Touchdown Total 4S² (glyphosate) | 24–75 fl oz | 1–3 | Apply before, during, or after planting but before crop emergence. Use the low rate for annual weeds up to 6 inches tall and higher rates for weeds taller than 6 inches. |
