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Corn - no-till Annual cover: barley, rye, wheat or no-till into existing crop stubble
Corn - no-till Annual cover: barley, rye, wheat or no-till into existing crop stubble
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| Weed Problem |
Chemical rate per acre |
Product per acre |
Remarks |
| Control of annual weeds and annual cover crops |
Paraquat 0.5-1.0 lb
+
surfactant |
Gramoxone Inteon 2SL 2.0-4.0 pt
+
surfactant as labeled |
Apply 2.0-2.5 pt/acre for weeds 1 to 3 inches tall; 2.5-3.0 pt/acre for weeds 3 to 6 inches tall; 3.0-4.0 pt/acre for weeds 6 inches tall. A nonionic surfactant is needed. Paraquat may not control weeds taller than 6 inches. Increase gallonage as density of stubble, crop residue, or weeds increases. Paraquat will not provide residual weed control. Residual herbicides can be tank-mixed with paraquat. |
| Control of annual weeds and annual cover crops and suppression or control of perennial weeds or covers |
Glyphosate 0.5-5.0 lb |
Roundup Weather Max 0.5-3.6 qt
or
Touchdown Total 0.4-3.6 qt
or
other labeled glyphosate formulation |
Apply Roundup Weather Max as follows: 16 to 22 oz/acre for small annual weeds, <6 inches tall; 22 to 32 oz/acre for annual weeds > 6 inches tall. When using nitrogen solutions as the carrier, use rate may need to be increased. For Touchdown Total, rates are 0.7 -4.3 pt/acre for annual weeds < 6 inches tall; 1.5-5.8 pt/acre for annual weeds > 6 inches tall or under stress. Higher rates will control perennial species, but those species often are not present or susceptible at the time of planting. Residual herbicides can be tank-mixed with these products. Applications with fan-type nozzles generally have been more effective than with flood nozzles. |
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Acetochlor products and use restrictions
Acetochlor Products, Use Rates and Restrictions
Single products:
Trade name Rate per acre
Harness 7E 1.0-2.5 pt
Degree 3.8L 1.13-2.75 qt
Topnotch 3.2CS 2.0-3.75 qt
Premixes:
Trade name Rate per acre
Degree Xtra 4.04L 2.9-3.7 qt
Field Master 4.25L 3.5-5.0 qt
Fultime 4CS 2.5-5.0 qt
Harness Xtra 6L 1.8-2.7 qt
Keystone 5.25SE 2.2-3.4 qt
Keystone LA 5.5SE 1.6-2.5 qt
Acetochlor use restrictions:
+ Read the label for information concerning personal protective equipment.
+ This product is toxic to fish. Avoid application and runoff to areas containing aquatic life.
+ This chemical demonstrates the properties and characteristics associated with chemicals detected in ground water. Avoid permeable soils and minimize runoff.
+ Do not apply to the following soils if ground water depth is 30 feet or less:
- sands with less than 3 percent organic matter,
- loamy sands with less than 2 percent organic matter, or
- sandy loams with less than 1 percent organic matter.
+ Observe restrictions on the label that concern mixing, loading, rinsing, and washing.
+ Do not apply through irrigation equipment.
+ Do not apply using aerial application equipment.
+ Do not use acetochlor on any crop other than corn.
Triazine-resistant weeds in no-till corn
For pigweed control, use a nonselective herbicide plus atrazine in combination with a chloroacetamide herbicide (alachlor, s-metolachlor, acetochlor, or dimethenamid-p). Simazine may also be included where required for late-season annual-grass control. The chloroacetamide herbicide will suppress or control initial triazine-resistant pigweed flushes, but in most years an early postemergence application of dicamba will be required for season-long control.
For control of triazine-resistant pigweed, common lambsquarters, and velvetleaf, use a nonselective herbicide in combination with flumetsulam (Python) or rimsulfuron plus thifensulfuron-methyl (Basis). With timely activation rainfall, these treatments can provide season-long control of these species without supplemental postemergence herbicide applications. Atrazine should generally be applied in combinations with flumetsulam for broad-spectrum weed control. A residual grass herbicide should be tank-mixed with Python or Basis for season-long grass control. Lexar or Lumax, blends of s-metolachlor + atrazine + mesotrione (Callisto) also provides excellent season-long control of triazine-resistant lambsquarters and pigweed species.
Guide to abbreviations
