What is in this article?:
- 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.
Scout fields in early- to mid-January to make spring management decisions.
If glyphosate-resistant Italian ryegrass escapes the fall residual herbicide application and is present in January, then the field should be treated with Select Max at 12 to 16 ounces per acre or 6 to 8 ounces of a 2-pound clethodim product.
Fields should be scouted again four to six weeks after clethodim application. Any surviving glyphosate-resistant Italian ryegrass should be treated with Gramoxone Inteon at 4 pints per acre.
Regardless of the program utilized, all ryegrass should be completely controlled prior to planting.
Unfortunately, there is little good news concerning glyphosate-resistant Italian ryegrass. The problem seems to be spreading every year. Few herbicides effectively control it, and most of these are expensive for burndown options.
Multiple herbicide applications are often required to completely control ryegrass, and the best herbicide application timings occur when most people are just not thinking about weed control for the next season.
The one positive right now is the dry weather has delayed emergence, so hopefully glyphosate-resistant Italian ryegrass will be more easily managed this year compared with last year.