What is in this article?:
- How to manage glyphosate-resistant Italian ryegrass
- Tillage, Gramoxone Inteon
- Ditch banks, field borders
- Scouting fields
- Residual herbicides in fall offer best chance for reliable control.
- Dual Magnum, Treflan, Command most consistent at Stoneville.
- Agressive tillage or Gramoxone Inteon for emerged ryegrass.
- Control on ditch banks, turn roads, field borders.
- Scout early to determine spring options.
Ditch banks, field borders
Manage glyphosate-resistant Italian ryegrass on ditch banks, turn roads, and field borders.
Where glyphosate-resistant Italian ryegrass was only present on the turn roads or edges of the field last year, spot-treating these areas is a practical way to save on herbicide cost and possibly prevent the problem from becoming more severe in the future.
You may choose to wait and spray field borders and turn roads with clethodim (Select Max or various two-pound clethodim products) or Gramoxone Inteon after glyphosate-resistant Italian ryegrass emerges.
Another option would be treating these areas with a residual herbicide in the fall. Either of these practices could be an economical option in fields not completely covered with ryegrass.
Be very cautious if you choose to spot-treat areas with a residual herbicide. Italian ryegrass has extremely stiff straw that does not rapidly deteriorate. It is not uncommon to see Italian ryegrass residue complete with seed still standing in the fall. This seed from the previous year can be spread by a combine or it may spread into the field where land planes or dirt buckets were utilized.