New Corn Herbicides for 2017

New Corn Herbicides for 2017 February 24, 2017

Corn in Accuron field trial
Figure 1. Weed control in field corn at 28 days after Acuron Flexi applied pre-emergence at 2 qt/acre at UNL’s South Central Ag Lab, Clay Center. (Photos by Amit Jhala)
corn in Corvus field trial
Figure 2. Weed control in Roundup Ready corn with Corvus applied pre-emergence followed by DiFlexx DUO applied post-emergence at UNL’s South Central Ag Lab, Clay Center.

The following herbicides are now available in Nebraska for weed management in corn. When selecting herbicides, note the sites of action and rotate them to help reduce the evolution of herbicide-resistant weeds in your fields. For more information see the newly revised industry Herbicide Classification chart.


Acuron® Flexi
[bicyclopyrone (0.87%) + mesotrione (3.47%) + S-metolachlor (31.24%)]

Acuron Flexi is Acuron without atrazine. Acuron Flexi may be used pre-emergence or post-emergence (up to 30 inches tall or 8-leaf stage) in field corn, seed corn, silage corn. It can be used in sweet corn and yellow popcorn, but only pre-plant or pre-emergence. Acuron Flexi contains the safener benoxacor. If organic matter content of the field is less than 3%, apply Acuron Flexi at 2.0 qt/acre; if organic matter is ≥ 3% apply at 2.25 qt/acre. Do not exceed 2.25 qt/acre of this product per year. Do not make more than one post-emergence application and not more than two total applications of Acuron Flexi per year. EPA Reg. No. 100-1568. Modes of Action: 27 + 27 + 15.


Armezon PRO
[topramezone (1.12%) + dimethenamid-P (56.25%)]

Armezon PRO is a premix of Armezon (topramezone) and Outlook (dimethenamid-P). It is an emulsifiable concentrate (EC) that provides systemic post-emergence control of emerged broadleaf and grass weeds followed by residual control in all corn types. Application rates depend on soil texture and organic matter content. It may be applied from corn emergence to V8 stage or 30-inch tall field corn and popcorn. For corn that is more than 12 inches tall but less than 30 inches, applications should be directed beneath the crop canopy using drop nozzles and appropriate nozzle spacing for best performance. EPA Reg. No. 7969-372. Modes of Action:  15 + 27.


DiFlexx® DUO

[dicamba (19.73%) + tembotrione (2.83%)]

DiFlexx DUO is a premix of DiFlexx (dicamba) and Laudis (tembotrione). DiFlexx DUO can be used for post-emergence selective control of broadleaf and grass weeds in corn and postharvest burndown weed control. DiFlexx DUO includes exclusive CSI™ safener technology which enables corn plants to better withstand herbicidal activity and provides better crop safety. It can be applied from emergence up to, but not including the V7 stage of growth, 36-inch tall corn, or 15 days prior to tassel, whichever occurs first. The application rates of DiFlexx DUO vary from 24 to 40 fl oz/acre depending on weed type and growth stage. Apply a maximum of two applications per growing season, separated by two weeks or more. EPA Reg. No. 264-1184. Modes of Action: 4 + 27.

 

Enlist™ DUO
[2,4-D choline (24.4%) + glyphosate (22.1%)]

For control of annual and perennial weeds in Enlist corn only. Do NOT use this product on Roundup Ready, Liberty Link, or any other type of corn. This herbicide is based on Colex-D technology. 2,4-D products that do not contain Colex-D technology are not authorized for use in Enlist corn and soybeans. It is a systemic herbicide intended for control of annual and perennial weeds.

Apply 3.5 to 4.75 pints of Enlist Duo per acre. Apply when weeds are small and corn is no larger than V8 growth stage or 30 inches tall (free standing), whichever occurs first. For corn heights 30 to 48 inches (free standing), apply using only ground application equipment using drop nozzles aligned to avoid spraying into the whorl of corn plants. Make one to two applications with a minimum of 12 days between applications. Do not apply more than 4.75 pints of Enlist Duo per acre per application. Do not apply more than 14.25 pints/acre of Enlist Duo per use season. EPA Reg. No. 62719-649. Modes of Action: 4 + 9.

 

Incinerate™
[mesotrione (40%)]

Incinerate is for control of annual broadleaf weeds in field corn, seed corn, yellow popcorn, and sweet corn. This product has an active ingredient similar to Dual II Magnum. EPA Reg. No. 100-1131-1381. Mode of Acton: 27.

 

Resicore™
acetochlor (31%) + mesotrione (3.3%) + clopyralid (2.7%)]

Resicore is for control of annual grasses and broadleaf weeds in field corn, seed corn, and silage corn with preplant, pre-emergence, and post-emergence application. Resicore can only be applied preplant or pre-emergence in yellow popcorn. Resicore is a premix of three herbicides with different modes of action. The application rate of Resicore is in the range of 2.25 to 3.0 qts/acre based on soil texture and organic matter content. EPA Reg. No. 62719-693. Modes of Action: 15 + 27 + 4.