Facing supply shortages and exponentially higher glyphosate prices in 2022, finding alternatives for spring burndown applications is becoming relevant. For no-till farms, effective burndown applications are key to a good start to the season.
Prior to this season, a spring burndown using glyphosate alone or part of a tank mix was a preferred solution to controlling weeds ahead of planting. In this article, we will explore some herbicide alternatives to glyphosate for burndown applications along with the best adjuvant pairings for optimal performance.
2,4-D and dicamba are primary alternatives to glyphosate to target broadleaf weeds ahead of planting. Adding a contact herbicide like paraquat can boost control of marestail and tends to work better when applied early or late in the day. Ahead of planting corn, atrazine can also be added to the mix to control broadleaf weeds, and metribuzin can be applied ahead of soybeans. Saflufenacil can also be used in conjunction with 2,4-D to help control early-season broadleaf weeds. There are other combinations available, but in general 2,4-D with the addition of another broadleaf-control herbicide can be used in place of glyphosate for control of early-season broadleaf weeds ahead of planting as a burndown application.
Spring burndown applications are typically focused on the control of winter annual and cool-season perennial broadleaf weeds. Early emerged grasses in areas further south are also of interest for burndown. Clethodim or paraquat are good alternatives to glyphosate for grass control.
Adjuvant recommendation can vary broadly based on your local circumstances, including crop selection, weather, other tank-mix partners, etc. Pesticides often have an adjuvant recommendation on their label that can include a water conditioner, activator adjuvant, surfactant, drift and/or deposition aid. Stickers can be used to make sure that the spray stays put during rains, and compatibility agents can help difficult tank-mix partners work together.
Based on all those factors, it is best to talk with your local distributor or retailer about what is best for your personal circumstances to optimize your active ingredients’ effectiveness.
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