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Keystone
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Active Ingredient: acetochlor and atrazine
Profile:
Keystone® herbicide is a soil-applied corn herbicide for dependable, consistent control of a wide spectrum of grasses and broadleaf weeds, including foxtails, barnyardgrass, crabgrass, waterhemp, lambsquarters, pigweeds, nightshade and many more.
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Features
- Excellent control of annual grasses
- Effective control of small-seeded broadleaf weeds
- Requires only 1/4 inch of rain for activation
- Can be applied from early preplant to early postemergence
- Fits conventional, reduced till and no-till corn production systems
- Can be used alone or in combination with many pre and postemergence corn herbicides
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Application Timing:
Early preplant (up to 30 days before planting)
Preplant surface or preplant incorporated (within 14 days of planting)
Preemergence surface (incorporate with rotary hoe if sufficient activating rainfall does not occur within seven days)
Early postemergence (corn up to 11 inches tall)
Application Rates:
2.2 to 3.4 qt./A
Restrictions and Best Use Practices:
For use only on field corn, production seed corn, silage corn and popcorn
Optimal weed control will be obtained when applications are made as close to planting as possible but before the corn emerges. It is recommended that a burndown herbicide such as Glyphomax® XRT or Durango™, or 2,4-D be tank-mixed with Keystone in reduced or no-tillage systems to control emerged weeds.
Do not apply to the following soils if groundwater depth is 30 feet or less:
- Sand with less than 3 percent organic matter
- Loamy sand with less than 2 percent organic matter
- Sandy loam with less than 1 percent organic matter
This product contains atrazine and may not control weeds that are known or suspected to be triazine resistant.
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Keystone is a Restricted Use Pesticide and is not available for sale, distribution, or use in the State of New York.
Always read and follow label directions.
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