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Home - News - Agronomy - Concerned About Leaf Cupping?

Concerned About Leaf Cupping?

Jul 5, 2023 | Agronomy

Soybeans with leaf blisters, cupping, and damage due to dicamba herbicide

If you’re hearing talk about leaf malformation (“leaf cupping”) observed in some Enlist E3® soybean fields this summer, it’s important to make sure you’re dealing with facts, not speculation. Here is some clear, credible information—including facts from third parties and universities—you can share with others.

Enlist E3 soybeans and Enlist® herbicides have been rigorously tested for years. Corteva Agriscience stands behind our technology. 

 

Enlist E3 soybeans are tolerant to 2,4-D choline because of a protein (aad-12) that metabolizes 2,4-D choline into a non-herbicide form. This gene is present and active throughout the life of the plant: It can’t be “turned on and off.”

 

   
Environmental factors have not been found to reduce 2,4-D tolerance in Enlist E3 soybeans. Extensive testing shows the trait is not affected by drought stress, temperature or saturated soils.

 

In hundreds of trials of 2,4-D applications (alone or with glyphosate or glufosinate), no leaf malformations were ever reported at rates of 1X, 2X and 4X.

 

Non-dicamba-tolerant soybeans are extremely sensitive to dicamba. University of Georgia weed science researchers found that soybeans without the dicamba-tolerant trait may show symptomology from dicamba exposure at 1/800 of the standard spray rate. *Dicamba exposure equivalent to 0.16 oz/gallon can damage soybeans without the dicamba-tolerant trait.

 

Dicamba off-target movement has been well documented by multiple universities.

 

If you have questions about what you observe in the field or would like to report an allegation of herbicide off-target movement, contact their state pesticide regulatory agency, call your AgVenture Yield Specialist or Contact Us.

* Dicamba Visual Sensitivity Scale for GA – 2018

http://gaweed.com/HomepageFiles/Visual%20Sensitivity%20Scale%20for%20Dicamba%20and%202,4-D%20in%20GA%20Final%20Dec%205.pdf

™ ® Trademarks of Corteva Agriscience and its affiliated companies. The transgenic soybean event in Enlist E3® soybeans is jointly developed and owned by Corteva Agriscience and M.S. Technologies L.L.C. Enlist Duo® and Enlist One® herbicides are not registered for sale or use in all states or counties. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your area. Enlist Duo and Enlist One are the only 2,4-D products authorized for use with Enlist crops. Consult Enlist herbicide labels for weed species controlled. Always read and follow label directions.  

© 2023 Corteva.

 

 

 

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