12 Steps That Help Curb Herbicide-Resistant Weeds

Using herbicides for a clean spring start is one way to prevent development of resistant weeds.

Herbicide-resistant weeds are a fact of life for most growers, adding cost and worry to crop production. The march to resistance doesn’t have to continue. Use these 12 steps from the Herbicide Resistance Action Committee to help prevent spread of resistant weed populations:

1. Understand weed biology. Scout fields and identify weeds present in your fields. Understand germination and growth cycles of problem weeds to help plan for better control.

2. Use a diversified management approach. Use different management methods and multiple modes of action to prevent weed seed production and reduce the number of weed seeds in soil.

3. Start clean. Planting into weed-free fields gives young crops an advantage. Keep fields as clean as possible throughout the growing season.

4. Plant weed-free crop seed.

5. Scout fields. Know your field history and keep records of identified weeds and control measures used.

6. Diversify modes of action. Use multiple effective herbicide modes of action that control the most troublesome weeds or those most prone to developing resistance.

7. Follow label instructions. Apply labeled herbicide rates at recommended weed sizes.

8. Use cultural practices to suppress weeds. Use best management practices to promote quick canopy closure to reduce weed competitiveness. Planting in narrow rows or at higher populations can reduce weed pressure.

9. Use alternative methods of control. Use mechanical and biological management where possible.

10. Prevent weed seed movement. Clean equipment before moving between fields to avoid transferring weeds seeds or vegetative reproductive parts between fields.

11. Manage weed seed at harvest. Start your weed-control program after harvest with a fall burndown herbicide application to prevent buildup of the weed seedbank.

12. Manage field borders. Weed pressure tends to be higher near field edges and fence lines. Take steps to mow ditches and remove weeds from fence lines to avoid field contamination.

The information provided on this website is for reference only. Always refer to the product labels for complete details and directions for use.