Growing Knowledge

Read the latest insights from our experts as they cover agronomy issues that matter most to you and your operation.

Improve Fungicide Response on Corn

Mark Glady
Regional Agronomist
A fungicide application represents a considerable investment. Be sure you get the most from it by answering these three questions before applying: What is the hybrid to be sprayed? What is the weather outlook for application day? What is the disease that’s being treated?

After that, determine which adjuvants should go in the tank. If 25 percent of your fungicide doesn’t reach its target, that means product — and money — is vanishing into thin air. An adjuvant helps keep fungicides and insecticides where they belong and helps deposit the product’s active ingredient deep into the crop canopy where it will be most effective.
 
MasterLock adjuvant hits the spot
Aerial applications are more common in cornfields at this time of the year and they use less water, which adds to the challenge of getting crop protection products where you want them. In 14 WinField United trials at locations in eight states between 2012 and 2017, adding MasterLock® adjuvant to the spray tank increased corn yields by an average of 5.7 bushels per acre compared to fungicide alone.
 
This data, along with our response-to-fungicide findings, can mean even more to you during this application season. (Note: This data includes third-party trials.)

masterlock-adjuvant-helps-improve-fungicide-response-on-corn.jpg

Benefits that pay off
Specifically created to enhance the performance of fungicides and insecticides in mid- to late postemergence applications to corn and soybeans, MasterLock offers a range of benefits:
  • Improved spray deposition
  • Increased canopy penetration
  • Enhanced adhesion, reduced bounce and increased coverage because droplets stick and spread
  • Reduced spray drift and pesticide evaporation
MasterLock is also not formulated with NPE, which has been linked to Arrested Ear Syndrome in corn, mostly when applied during vegetative growth stages.
 
Enhance coverage and increase control
A hybrid of InterLock® adjuvant and DropTight additive, MasterLock helps eliminate fines by driving droplets down into the canopy, which enables droplets to hit and stick to the leaf.
 
To control diseases and insects that live below the canopy, MasterLock enhances deposition to deliver fungicides and insecticides lower into the canopy for improved coverage of the plant. In numerous research trials, MasterLock has been shown to decrease the incidence of infection from diseases and help improve insect control with insecticides.
 
Make sure that if fungicide is on your expense sheet this year that you get the full ROI out of it by adding an adjuvant to the tank. Talk with your local trusted advisor about including MasterLock in your late-season application plans.
 
Always read and follow label instructions. Product descriptions and ratings are generated from Answer Plot® trials and/or from the genetics supplier and may change as additional data is gathered. These ratings also reflect trends in product performance during research trials that are dependent upon many factors beyond the control of WinField United including without limitation, weather, soil types, disease pressure, crop production patterns and other uncontrollable factors.

The Skinny on Pump Shear and Dicamba Drift

Dan Bissell
Senior Research Engineer, Product Development
Last season brought headlines of farmers who faced challenges when they applied a new dicamba herbicide to their field — as well as to some who did not. More often than not, inadvertent dicamba drift was publicized to be the main culprit for damanged crops and bad feelings between neighbors.
 
At WinField United, we heard the stories. And we have a solution to help limit dicamba drift, giving you greater peace of mind.
 
If you have planted dicamba-tolerant soybeans or cotton this year, using a superior drift reduction adjuvant (DRA) is key to keeping your dicamba applications on target. However, not all DRAs are created equal. Some can break down in the spray tank due to shear in the pump. This renders them largely ineffective.
 
Finding answers
As part of our rigorous WinField® United Product Development Process, we evaluated several DRAs with new dicamba herbicide tank mixes using the WinField® United Spray Analysis System. In our lab-scale testing, some DRAs lost their ability to reduce driftable droplets due to the high shear environment of the pump simulation.1
 
But our testing also revealed a promising opportunity.
 
We found that OnTarget™ adjuvant was more resistant to shear breakdown, maintaining its drift-reduction technology, even after 50 passes through a sprayer pump simulation.
 
ShearGraphic2-copy-web.png 
The pump shear problem
All DRAs start out by decreasing drift when mixed with dicamba. But some may not sustain that performance over time because they are subjected to shear forces in the pump, which occurs when some liquid moves faster than neighboring elements. The theory is that shear force causes the polymers in some DRAs to break apart, diminishing drift control.
 
OnTarget is formulated to be compatible with extra- and ultra-coarse nozzles and dicamba-based tank mixes, and its anti-foam formulation makes application convenient.
 
Adding OnTarget to the tank can give you more confidence about your spray outcomes. Make sure you’re getting the most out of your herbicide investment by reducing drift, enhancing droplet spreading and improving canopy penetration. Talk with your trusted local advisor about how OnTarget can work for your dicamba-tolerant crops this year.
 
 
1. Bissell, D. C., Brown, D., Magidow, L. C., and Gednalske, J. V., “An Assessment of Polymeric Drift Reduction Adjuvant Performance After Prolonged Exposure to Pump Induced Shear,” Pesticide Formulation and Delivery Systems: 38th Volume, Innovative Application, Formulation, and Adjuvant Technologies, ASTM STP1610, B. K. Fritz and T. R. Butts, eds., ASTM International, West Conshohocken, PA; 2018.
 
Because of factors outside of WinField United's control, such as weather, applicator factors, etc., results to be obtained, including but not limited to yields, financial performance, or profits, cannot be predicted or guaranteed by WinField United. Actual results may vary.

DRAs Really Do Matter

Dennis Christie
Agronomist
Once you’ve decided to plant dicamba-tolerant soybeans, be sure you’re ready to take the steps needed to ensure a solid return on your investment through more effective weed control. Using application techniques appropriate to new dicamba herbicide tank mixes will help protect yield potential while preserving the value of the technology for future seasons.
 
Follow the rules
Job one is to follow all label guidelines for tank-mixing herbicides before applying the mix to Roundup Ready 2 Xtend® soybeans or cotton with XtendFlex® technology. That means following directions for application timing and procedures, using approved nozzles and, in almost every case, adding a drift reduction agent (DRA) to the tank mix.
 
You’ll find lists of approved DRAs for each product on company websites. Specific requirements vary by state and can change over time, so double-check guidelines within a week of applying a low-volatility dicamba herbicide.
 
DRA 101
In general, DRAs help reduce off-target applications by making spray droplets larger. Larger droplets are better able to penetrate the canopy to reach surfaces of target weeds, which results in more effective control.
 
Larger droplets also means fewer droplets, so follow guidelines for spray volume to ensure good coverage. Most dicamba tank mixes should be applied at 15 gallons per acre, but be sure to check the label and consult your agronomist with any questions before making an application.
 
Aren’t all DRAs the same?
Even among approved DRAs, you will find performance differences. While all DRAs start out doing the job of increasing spray droplet size, some DRAs may not maintain that performance over time as they are subjected to recirculation within the spray tank.
 
Here’s why: Shear forces imposed on a spray solution moving through a spray system can cause DRAs to act differently. Some DRAs are more susceptible to shear forces, which reduces their ability to suppress fine droplets during application.
 
In testing multiple DRAs with new dicamba herbicide tank mixes using the WinField® United Spray Analysis System, we found some DRAs lost their ability to reduce the percent of driftable fines. However, OnTarget™ adjuvant continued to work after many revolutions through the spray pump.
 
We know OnTarget™ adjuvant will give you the best potential for return on your DRA investment based on comprehensive testing with the WinField® United Spray Analysis System, validated by in-field testing. The graph below shows reduced small particles in dicamba applications when OnTarget™ adjuvant was added to the tank mix.

 We have seen additional good results in field trials when OnTarget™ adjuvant and InterLock® adjuvant are used together in dicamba tank mixes. Adding InterLock® adjuvant at a rate of 1 to 2 ounces per acre will help improve consistency of spray droplet size for better coverage and performance.
 
Take time to plan your herbicide tank-mix strategy before application season heats up. Adding a DRA to a dicamba mix is the best way to get better return on your input investments and ensure good results from this needed weed-control technology for years to come.

XtendiMax® herbicide with VaporGrip® Technology is a restricted use pesticide. XtendiMax® herbicide with VaporGrip® Technology is not registered in all states and may be subject to use restrictions in some states. The distribution, sale, or use of an unregistered pesticide is a violation of federal and/or state law and is strictly prohibited. Check with your local Monsanto dealer or representative for the product registration status in your state.
 
ALWAYS READ AND FOLLOW DIRECTIONS FOR USE ON PESTICIDE LABELING. IT IS A VIOLATION OF FEDERAL AND STATE LAW to use any pesticide product other than in accordance with its labeling. NOT ALL formulations of dicamba or glyphosate are approved for in-crop use with Roundup Ready 2 Xtend® soybeans, Bollgard II® XtendFlex® or XtendFlex® cotton. ONLY USE FORMULATIONS THAT ARE SPECIFICALLY LABELED FOR SUCH USES AND APPROVED FOR SUCH USE IN THE STATE OF APPLICATION. XTENDIMAX® HERBICIDE WITH VAPORGRIP® TECHNOLOGY AND IN CROP USES MAY NOT BE APPROVED IN ALL STATES. Contact the U.S. EPA and your state pesticide regulatory agency with any questions about the approval status of dicamba herbicide products for in-crop use with Roundup Ready 2 Xtend® soybeans, Bollgard II® XtendFlex® or XtendFlex® cotton.
 
Roundup Ready 2 Xtend® soybeans contains genes that confer tolerance to glyphosate and dicamba. Bollgard II® XtendFlex® cotton contains genes that confer tolerance to glyphosate, dicamba and glufosinate. Glyphosate will kill crops that are not tolerant to glyphosate. Dicamba will kill crops that are not tolerant to dicamba.
 
Glufosinate will kill crops that are not tolerant to glufosinate. Contact your Monsanto dealer or refer to Monsanto’s Technology Use Guide for recommended weed control programs.
 
Individual results may vary, and performance may vary from location to location and from year to year. This result may not be an indicator of results you may obtain as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible.
 
ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Bollgard II®, Genuity®, Monsanto and Vine Design®, Roundup Ready 2 Yield®, Roundup Ready 2 Xtend®, XtendFlex®, XtendiMax® and Vaporgrip® are trademarks of Monsanto Technology, LLC

The Truth About Adjuvants

Joel and Jon
Hosts, WinField United
Joel Wipperfurth is joined by guest host Jon Zuk on this episode of The Deal With Yield. The two cover the main factors farmers should consider when selecting and using adjuvants, including a review of current product testing and best practices for in the tank, in the air and in the plant applications. Plus, Jon teaches us a lesson using spaghetti.
Season 12, Episode 3: The Truth About Adjuvants

The Deal With Yield is a podcast series covering the issues that matter most in crop production.

Dicamba: Preparing for 2018

Joel and Kyle
Hosts, WinField United
On this episode of The Deal With Yield, Joel and Kyle talk dicamba and dish soap. The guys cover best management practices for successful applications in 2018 and dive into new training programs.
Season 11, Episode 6 — Dicamba: Preparing for 2018

The Deal With Yield is a podcast series covering the issues that matter most in crop production.

Displaying results 1-5 (of 17)
 |<  < 1 - 2 - 3 - 4  >  >| 
SUBSCRIBE TO THE ANSWER PLOT® ADVISOR NEWSLETTER