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Farmers taking action on glyphosate resistance, poll shows

Agriculture.com Staff 09/23/2010 @ 3:42pm

Nearly 60% of farmers who responded to a recent poll say they are changing their weed management plans to deal with growing glyphosate resistance.

The poll, conducted by BASF Crop Protection, shows a similar percent of farmers are adding a preemergent herbicide with residual control to battle stubborn weeds such as ragweed, marestail, lambsquarters and waterhemp.

“Lambsquarters are coming through higher rates of glyphosate, leaving weed pressure and competition in fields later in the season,” one responding farmer said in the poll, according to a BASF report.

While only 23% of respondents believe glyphosate resistance will impact their yield this growing season, the poll confirms that many farmers believe they need to take action now to overcome the threat of yield-robbing glyphosate resistant weeds in the future.

A Purdue University study conducted in 2005-2006 found 40% to 47% of growers indicated that tank-mixing glyphosate with residual herbicides, or including alternate herbicides with different modes of actions would be effective management practices for minimizing weed resistance. Five years later the BASF poll confirms that a majority of farmers are putting those ideas into practice.

“Growers are looking for new herbicide chemistry to fill in the gap where glyphosate is falling short,” said Dr. Dan Westberg, Technical Market Manager for BASF.  “BASF is leading the way in addressing resistance with new chemistries like Kixor herbicide technology, the most successful herbicide launch in more than 20 years.”

Kixor family of products is the first and only herbicide in the United States in the pyrimidinedione family. This unique chemistry provides broad-spectrum control of broadleaf weeds including ALS, triazine and glyphosate resistant biotypes. Kixor provides burndown and soil activity across a wide range of crops, making it one of the most flexible and versatile herbicide technologies on the market

Despite widespread acknowledgement among agricultural experts about herbicide resistance, 40% of farmers who answered the poll plan to increase the use rate of glyphosate or the number of post-emergent applications from last year, creating conditions that are ripe for development of resistance.

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