What are some tactics you can employ around harvest time to help prevent weeds from replenishing the weed seed bank and giving you more headaches for years to come?
With the popular weed killer in legal straits in the U.S., no-tillers say they’d turn to other chemicals, rollers or other options. But most won’t give up on cover crops.
Glyphosate has been invaluable to no-tillers in North America and overseas as an inexpensive, effective tool for not only killing weeds but also terminating cover crops ahead of or after planting.
When we launched No-Till Farmer in 1972, paraquat was the No. 1 burndown herbicide. While it has lost much of its popularity to glyphosate, Mark Loux says it is one of those herbicides (marketed as Gramoxone by Syngenta) that could have been used much more in recent years to help control marestail and to interrupt the continuous glyphosate use cycle. The Ohio State University weed scientist says paraquat is most effective on small annual weeds.
With the price of Gramoxone getting cut by about half this winter, Ohio State University Extension encourages growers to include it in their burndown this spring, especially on marestail.
University of Tennessee Extension says there are four herbicides to choose from to burndown small to larger marestail while avoiding a long plant-back time for soybeans.
University of Tennessee Extension shares the most effective herbicides and tank mixes a grower can utilize as a burndown for marestail in soybeans and cotton.
Although horseweed can be controlled well with traditional auxin herbicides like
2,4-D or dicamba, Oklahoma State University has been exploring additional options that could increase the sustainability of auxin products for the future.
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On this episode of Conservation Ag Update, brought to you by Martin-Till, Brian and Darren Hefty, fourth-generation farmers and hosts of Ag PhD, share tips for treating tar spot in corn.
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