Marestail Could Be a Problem Yet Again This Spring

When marestail emerge in the fall, a lack of a fall burndown treatment will result in a head start of a marestail problem in the spring. With the weather we had this fall, not a lot of fall applications were made. If the marestail do not have a proper spring burndown treatment, you can expect a reduction in soybean yields; especially if action was not taken in the fall.

Even if there was no fall herbicide treatment, there are still actions that can be taken to prevent a field overtaken by marestail in the spring:

  • Apply effective burndown herbicides in the spring when marestail plants are in the rosette stage. Consider using multiple herbicides that have effective burndown against marestail. Example: 2,4-D + Sharpen
  • The use of dicamba can also effectively control marestail in fields that have overwintered.
  • Increase herbicide rates, include non-ALS residual herbicides, and use complex mixtures.
  • One of the most highly recommended control methods is to do a split-spring application; rather than applying everything at once in the spring. Example: early spring burndown herbicide + residual; residual at the time of planting.

A grower can expect, especially this year, to have a marestail problem in the spring. With failure to apply fall burndown treatments, you are at a greater risk. Research shows that if the grower advances his/her herbicide mixtures, includes non-ALS residual herbicides, and considers split-spring applications, they can have a better handle on marestail in the spring.

Call our office at 937-349-2080 to plan a burn down program to control marestail in your fields this season.


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