Dicamba

The Rise of Multiple-Resistance in Nebraska’s Weeds and Effects Of Dicamba Micro-Rates on Sensitive Crops April 16, 2018

Weed resistance to herbicides is a global problem, which usually results from the repeated use of herbicides with the same mode of action. Simply said: “Weeds just got used to that mode of action and cannot be killed with that mode of action anymore.” Similar phenomenon is observed in medicine with disease resistance to antibiotics.

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The Good, the Bad, and the Ugly when Spraying the New Phenoxy Herbicide Formulations April 16, 2018

The Good is that these new phenoxy herbicide formulations will help control tough broadleaf weeds, including resistant and difficult-to-control weeds in Xtend and Enlist soybeans.

The Bad is that if not used with a weed management plan, we could quickly lose these new formulations to weed resistance.

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soybean leaf cupping
Figure 1. Leaf cupping of non-Xtend soybean is one indicator of crop injury from dicamba off-target drift.

Dicamba Off-target Injury Issues in Nebraska Soybean April 9, 2018

Dicamba- and glyphosate-resistant soybean, also known as Roundup Ready 2 Xtend soybean, became commercially available for the 2017 growing season. About 500,000 acres were planted with Xtend soybean in Nebraska in 2017 growing season. Three dicamba-based herbicides — XtendiMax, FeXapan, and Engenia — are labeled for application in Xtend soybean.

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Market Journal on Importance of Following Dicamba Labels April 6, 2018

This week on Market Journal Greg Kruger, Nebraska extension weed science and application technology specialist, discusses the importance of reading, studying, and following dicamba product labels.

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Glyphosate-resistant common waterhemp in soybean without a pre-emergence herbicide with multiple sites of action.
Glyphosate-resistant common waterhemp in soybean without a pre-emergence herbicide with multiple sites of action.

Pre-emergence Residual Herbicides are the Foundation of Soybean Weed Control March 29, 2018

Even with new dicamba-resistant soybeans, pre-emergence, residual herbicides are needed to mitigate yield loss due to weed competition, provide a longer time for soybean to establish, and reduce selection pressure for weeds resistant to post-emergence herbicides.

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Dicamba Training Available Online March 23, 2018

Nebraska Extension has completed its in-person dicamba training programs for spring 2018. If you still need to take dicamba training, Extension offers a free online option.

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Q&A: How Often do I Need to Record Dicamba Sprayer Cleanout? February 26, 2018

New RUP dicamba Q&A: Since I must record how and when the spray system cleanout was done, how should I do this when using the same RUP dicamba product on Xtend soybeans for multiple loads and/or over several days?

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Greg Kruger demonstrating pesticide sprayer adjustments

Pesticide Spray Clinic March 6 in Syracuse February 23, 2018

Learn enhanced stewardship for dicamba and 2,4-D, how to better mitigate spray drift, and nozzle recommendations to improve control of troublesome weeds among other topics at an advanced clinic for pesticide spray applicators March 6 in Syracuse.

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