NDSU’s Stachler Now Lists 11 “minimum” Efforts To Forestall Weed Resistance

Jeff Stachler, North Dakota State University and University of Minnesota Extension Service sugar beet weed specialist, has come up with an 11-point “minimum requirement” list for farmers to control the resistance problem in weeds. He says everyone will have to do their part.

Stachler was one of the speakers at the Peterson Farms Seed field days near Prosper, N.D., on Thursday, Sept. 6. Carl Peterson said he was pleased at the turnout, and said weed resistance is one of the key issues on the horizon for farmers.

 The event featured top officials from all four of the major technology providers, all of whom are planning new technology releases to help combat the problem.

Says Stachler:

  • Maintain a weed-free zone around the perimeter of fields and 100 percent of field areas (wet spots, crop skips, IDC and salt spots and otherss) having a limited or no-crop stand.
  • Practice zero-tolerance (100 percent weed control) nfor all fields where herbicides are used as the main weed management tool.
  • Choose the most effective herbicide(s) for the most difficult-to-control weeds.
  • Apply the most effective soil-applied herbicide(s) for the most problematic (resistant, difficult-to-control, or late-emerging) weed species in all crops.
  • Rotate herbicide mechanisms of action on an annual basis. Acetamide herbicides have the least risk for herbicide resistance.
  • Plant a different type of herbicide-resistant crop every other year.
  • Use tank mixtures for nearly all post-emergence herbicide applications. This strategy would also be beneficial for soil-applied herbicides.
  • Apply post-emergence herbicides to small (1- to 3-inch) weeds at all times.
  • Include the most effective adjuvant(s)s for the herbicides being applied in all crops to maximize weed control, not necessarily to decrease crop injury.
  • Apply herbicides at the appropriate droplet size for the most limiting herbidcide(s) being applied. Contact herbicides should be applied as fine- to medium-sized droplets. Translocating herbicides should be applied as medium- to coarse-droplets.
  • Reduce sprayer travel speeds. Ideal speed is 6- to 8-miles per hour.

The popular Peterson Farms Seed field daydrew more than 300 people, but the crowd was reduced due to an extremely early soybean harvest season. “Who would have thought we’d have soybean harvest the first week of September?” says Julie Peterson.