Include Group 7 Linex® to Control Triazine Resistant Weeds in Potatoes


Control triazine resistant weeds such as Lambsquarter, Pigweed and others by including Linex® 4L in your herbicide program.

The continuous use of Group 5 herbicides such as atrazine and metribuzin in fields rotated between potatoes, corn and other crops, year after year, can result in the development of triazine resistant weeds. Linex® 4L (linuron) is a urea-based herbicide (Group 7) which has a different mode of action versus metribuzin and atrazine. Using LINEX for your pre-emergence application in potatoes breaks the cycle of continual triazine use and can result in better control of resistant weeds. In addition, using LINEX in a preemergence application allows greater flexibility in-season.

Using LINEX at Pre-emergence Provides the Following Benefits:

  • Controls resistant weeds by using a different mode of action
  • Reserves in your “tool box”, post emergence applied herbicides with a different mode of action for use in-season if needed.

Use Instructions

  • Do not spray over top of emerged potatoes.
  • Do not exceed 3 pints per acre per year.

East of Rocky Mountains Only

Apply 1.5 to 2.5 pints per acre on the lighter soils (sandy loams, silt loams; 1 to 2% organic matter) and 2.5 to 3 pints per acre on heavier soils (silts, clay loams; 2 to 5% organic matter). On soils over 5% organic matter, use 3 pints. per acre to emerged weeds (before potatoes emerge). For improved annual grass and nutsedge control, consider tank mixes with S-metolachlor.

Preemergence Application

Make a single application as a broadcast spray after planting but before crop emerges.

Plant seed at least 2 inches deep. If beds are to be dragged and/or hilled, apply after the final dragging or hilling operation. Apply before grasses are 2 inches tall and before broadleaf weeds are 6 inches tall, preferably just before or when weed seedlings emerge. If emerged weeds are present, add 1 pint surfactant for each 25 gallons spray mixture.

In irrigated areas, best results are obtained when application is made to moist soil, followed within 2 weeks by 1 inches to 2 inches of sprinkler irrigation (or rainfall). On powder dry soils, irrigate prior to herbicide application and follow with sprinkler irrigation to activate the herbicide.

Always read and follow label instructions.