Monthly Archives: June 2015

Don’t rely on a single tool for weed management

Andy Asbury
Enlist™ Field Specialist
Dow AgroSciences

Andy-AshburyGlyphosate-resistant weeds have been on the rise over the past decade. Regardless of whether growers are experiencing weed resistance on their farm, it is important to remain vigilant in their weed management program.

As the number of resistant weeds increases, controlling them becomes more complex. Start with clean fields and make timely herbicide applications. Apply when weeds are small and most easily controlled.

“On our farm, we’ve been seeing some glyphosate resistance with ragweed and waterhemp,” says Corey Strottmann, a grower from Story City, Iowa. “Glyphosate resistance is impacting our operation by costing us time and money.”

To control the tough weeds, Strottmann says his operation relies on a program approach and incorporates multiple modes of action.

Pay close attention to modes of action, especially when crops are not being rotated. Add a new mode of action to help prevent resistance issues.

Follow a program approach with multiple modes of action. Depending on tillage practices, you may apply a residual, such as Sonic® herbicide in soybeans or SureStart® II herbicide in corn, or a burndown and residual. Next, timely apply a postemergence herbicide, such as Enlist Duo herbicide for Enlist crops. In the fall, consider a fall burndown to help prepare for the next season.

And, don’t underestimate the power of scouting fields. Consider the following scouting tips:

  • Be aware of weed types and common resistant species in your area.
  • Prior to application, scout the field to identify the toughest-to-control weeds. Use full rates of the herbicides during applications.
  • Following each application, scout the fields to identify weed escapes.
  • Watch for noticeable patterns where weed escapes occur. Identifying potential resistance issues early will help prevent widespread distribution later.

New technology such as the Enlist system provides an additional mode of action to help control tough and resistant weeds. To make the most of new herbicides, it’s important to ensure the technology is used properly. Before you head into the field, calibrate your equipment, clean your screens and check your nozzles. This helps prevent potential breakdowns that could delay application.

Best management practices during application are key to ensuring the herbicide is able to do its job. Calibrate your sprayer for slower ground speeds and lower the boom height for better coverage. Be aware of surrounding fields and environmental conditions, such as wind speed and temperature inversions, when applying a herbicide.

For more information on the latest herbicide-tolerant trait technology available to help you manage hard-to-control and resistant weeds, visit Enlist.com or talk with your Dow AgroSciences sales representative.

Waterhemp is becoming harder to control on Corey Strottmann’s farm in Iowa. A few days after spraying Enlist Duo™ herbicide, waterhemp and other weeds were controlled.

Waterhemp is becoming harder to control on Corey Strottmann’s farm in Iowa. A few days after spraying Enlist Duo™ herbicide, waterhemp and other weeds were controlled.

®™Trademarks of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Enlist Duo, Sonic and SureStart II are not registered for sale or use in all states. SureStart II is not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is for sale or use in your state. Always read and follow label directions. ©2015 Dow AgroSciences LLC

Dow AgroSciences to launch a new weed control tool in corn

Dow AgroSciences is planning to release a new corn herbicide to control grasses and broadleaf weeds deep into the growing season. Registration for this herbicide, currently referred to as GF-3471, is expected in 2016.

GF-3471 is designed to feature a novel formulation of three leading active ingredients that have not been included together in any previous herbicide. This exclusive formulation contains three modes of action and does not include atrazine or glyphosate. The intent of the herbicide is to exceed industry standards with strong, trusted residual control of many herbicide-resistant weeds, including Palmer amaranth and giant ragweed.

“Upon regulatory approval, this new herbicide could be an excellent way to give corn growers peace of mind that their weeds are controlled well into the season,” says Luke Peters, corn herbicides product manager, Dow AgroSciences. “Providing trusted residual activity allows cornfields to stay cleaner longer, which can lead to higher yield.”

GF-3471 is expected to offer flexible application timing from preplant through early postemergence.

2014 research trials showed clean fields using GF-3471 from Dow AgroSciences.

2014 research trials showed clean fields using GF-3471 from Dow AgroSciences.

“The troublesome weeds growers face today are very concerning,” Peters says. “We look forward to offering GF-3471 to improve efficacy and help solve this ever-growing threat to yield potential. In early field trials, it has shown exceptional weed control.”

GF-3471 will be included in university field trials and will be featured in public Dow AgroSciences field plots in 2015. Developed to help growers meet the needs of their operations, this new corn herbicide will be a welcome addition to the current industry-leading Dow AgroSciences portfolio.

Visit a Dow AgroSciences field plot this summer for more information and to see
GF-3471 in action.

® Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. GF-3471 is not registered for sale or use. This presentation is intended to provide technical information only. Always read and follow label directions. ©2015 Dow AgroSciences LLC

Protect soybean fields from aphid invasions with Transform® WG insecticide

Since the soybean aphid made its debut in 2000, the tiny yellow-bodied sap-feeding pest has become the most damaging insect for soybean growers in nearly every Midwestern state. The aphid’s sporadic movement makes it difficult to predict potential invasions, which makes scouting and sampling for soybean aphids critical. Growers should be on the lookout during the primary reproductive growth stages of soybeans, typically late May through mid-August.

Thanks to the proven performance and efficacy of Transform® WG insecticide from Dow AgroSciences, soybean growers now have an extremely effective weapon for defending fields from soybean aphid invasions. Transform provides superior control of soybean aphids via direct contact and ingestion. Once sprayed on the plant, Transform moves from the surface to the inside of the leaves — a property called translaminar activity — and up into new growth areas through systemic movement to deliver excellent control with extended residual. Transform also offers a distinctive new chemistry with a unique mode of action that controls pests that might be resistant to other insecticides.

Field trials underscore the efficacy of Transform (see chart). When applied at the recommended rate of 0.75 ounce per acre, aphid populations were reduced from more than 300 insects per plant (untreated) to fewer than 50 within four days of application. Even more exciting is the residual demonstrated after 20 days of treatment, resulting in aphid populations reduced to near zero while untreated areas measured more than 300 aphids per plant — well above the action threshold level for soybeans.

In addition to excellent control and proven residual, Transform® WG insecticide also has minimal impact on beneficial insects and does not flare mites. The effectiveness of Transform at a low use rate is a cost-effective advantage for growers, and Transform is tank-mix-compatible with most commonly used crop protection products: nutrients, adjuvants, herbicides and fungicides.

Contact your Dow AgroSciences sales representative for details about how Transform can be an effective weapon in the battle against invading soybean aphids. For more information, visit TransformMySoybeans.com.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Transform WG is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2015 Dow AgroSciences LLC

Help corn have season-long access to nitrogen

Managing nitrogen is not a one-time event. For optimized crop growth and yield potential, nutrient management is as important in the middle of the season as it is at planting, says Dr. Eric Scherder, field scientist, Dow AgroSciences.

“Nitrogen is something growers should be thinking about all season long, and thinking about how to manage it,” Scherder says. “When it comes to managing nitrogen, you want to stabilize fall or spring applications if that’s the bulk of your fertilizer, because that’s when you have the greatest loss opportunities.”

Corn experiences a critical period of nutrient uptake between the V5 and V8 growth stages. Therefore, stabilizing nitrogen is equally important for growers who make a sidedress application at the V5 or V6 stage, Scherder says, because corn continues to need large amounts of nitrogen for another 30 to 50 days. During that time, corn can’t afford to have a bad day.

The majority of nitrogen loss occurs below ground. For optimized yield potential, it’s important that your customers protect their nitrogen in the root zone. Instinct® II and N-Serve® nitrogen stabilizers have been proven to reduce both the leaching of nitrogen into groundwater and the escape of nitrogen into the atmosphere as a greenhouse gas.

For more information, visit NitrogenStabilizers.com or contact your local Dow AgroSciences sales representative.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Instinct II is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Do not fall-apply anhydrous ammonia south of Highway 16 in the state of Illinois. Always read and follow label directions. ©2015 Dow AgroSciences LLC

Growers’ perspectives on weed control

The Enlist Weed Control System takes weed control to a new level. Featuring advanced herbicide and trait technology, it combines glyphosate and new 2,4-D choline for exceptional control of a broad spectrum of weeds – including hard-to-control and resistant weeds.

The two modes of action in Enlist Duo herbicide work with a program approach to deliver season-long control and help prevent weed resistance. With it, growers can maximize yields by eliminating nutrient-robbing weeds from their fields.

“Enlist Duo herbicide did everything we expected it to do,” says Corey Strottmann, Iowa grower. “And it didn’t take much time, either. It didn’t take a week to 10 days; it happened in a matter of hours. You could tell that it was controlling the weeds.”

In this video, Strottmann and other growers explain how the Enlist system offers less worry, higher yields and exceptional weed control.

For more information, visit Enlist.com or watch what other growers had to say about their experience with the Enlist system.

Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Regulatory approval is pending for Enlist cotton. Enlist Duo herbicide is not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2015 Dow AgroSciences LLC

2015 Diamond Showcases highlight Dow AgroSciences products

This summer, Dow AgroSciences invites retailers, growers and seed dealers to attend its 2015 Diamond Showcases for a local, field-based tour of the broad Dow AgroSciences crop protection portfolio and seeds business. Located throughout the Midwest and South, the Diamond Showcases offer you a chance to interact with and learn from our sales representatives and our technical experts on the latest technologies in crop protection, seeds and traits.

For more information on dates and locations, contact your local retail dealer, Dow AgroSciences sales representative or field specialist. Below is a sampling of the products that will be featured this year.

EnlistWeed Control System

With tolerance to a new 2,4-D and glyphosate, the Enlist Weed Control System advances herbicide and trait technology. Diamond Showcase attendees will gain an understanding of the benefits growers receive with Enlist Duo herbicide with Colex-D Technology, including near-zero volatility, minimized potential for physical drift, low odor and improved handling characteristics. Attendees will receive practical information needed to incorporate the Enlist system in customers’ operations for the future, including application scenarios and tank cleanout procedures.

Corn herbicides

Dow AgroSciences has a leading portfolio of crop protection tools, including SureStart® II herbicide, to control weeds in corn. In addition to seeing SureStart II in action, Diamond Showcase attendees will get a glimpse of GF-3471, a new corn herbicide from Dow AgroSciences. GF-3471 will provide trusted residual control of tough weeds deep into the growing season. Registration for this herbicide is expected in 2016.

Soybean herbicides

Diamond Showcase attendees can see how Dow AgroSciences’ soybean herbicides help growers keep fields clean throughout the growing season. With proven performance on difficult-to-control and herbicide-resistant weeds, growers depend on Sonic® and Surveil® herbicides for clean fields, an easy harvest and increased soybean yield potential.

Nitrogen stabilizers

Instinct® II and N-Serve® nitrogen stabilizers work at the root zone of corn and wheat crops to reduce leaching of nitrogen into groundwater and denitrification into the atmosphere, keeping nitrogen in the soil longer for crops to use when they need it. Diamond Showcase attendees will see the advantages of using Instinct II with urea, UAN and manure and N-Serve with anhydrous ammonia.

Insecticides

The insecticide plots at this year’s Diamond Showcases will demonstrate the effectiveness of the Dow AgroSciences’ insecticide lineup and highlight the benefits associated with each product. As the newest addition to the Dow AgroSciences insecticide portfolio, Transform® WG insecticide offers a distinctive new class of chemistry with a unique mode of action that provides superior control of sap-feeding insects, including soybean aphids. Transform also provides fast knockdown and residual control and is the insecticide growers need to help protect their soybeans and increase yield potential.

Another offering from Dow AgroSciences is Cobalt® Advanced insecticide, which uses two powerful modes of action to eliminate multiple insect species across a variety of crops, including soybeans, corn, alfalfa, sorghum, sunflower and wheat.

Mycogen Seeds

Top-performing Mycogen® brand corn hybrids and soybean varieties will be on display at this year’s Diamond Showcase plots. Attendees will get an in-depth look at the products best-suited for their local geography and industry-leading trait offerings, including the Enlist Weed Control System. Agronomists also will be on hand to share tips for local agronomic challenges growers are facing, such as managing sudden death syndrome or Goss’s wilt.

For more information about this year’s Diamond Showcases or Dow AgroSciences’ portfolio of products, contact your Dow AgroSciences sales representative.

®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. Cobalt Advanced is a federally Restricted Use Pesticide. Cobalt Advanced, Enlist Duo, Instinct II, Sonic, SureStart II, Surveil and Transform are not registered for sale or use in all states. SureStart II is not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Do not fall-apply anhydrous ammonia south of Highway 16 in the state of Illinois. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. GF-3471 is not registered for sale or use. This presentation is intended to provide technical information only. Always read and follow label directions.
©2015 Dow AgroSciences LLC

Three tips for superior scouting

Weeds tend to cause headaches for most growers at some point. Thorough scouting and proper weed identification can help make your and your customers’ lives a little easier. One way to determine the most effective herbicide program is by scouting for weeds early and often.

Consider these tips when scouting fields this season:

  1. Get out of the truck. Scouting on foot will help you stay one step ahead of weeds. If you can spot them when you’re driving by, chances are they should have been treated already.
  1. Document, document, document. Write down every species you find in the field. Also use maps or a global positioning system for accuracy, and check the entire area of changes in soil type, slope and drainage.
  1. Positively ID weeds. Determining the weed species as well as the height and growth stage is important to develop the most effective weed management program. Many universities, such as the University of Missouri, provide helpful guides to aid in proper weed identification.

Understand weed pressure in the field to offer management guidance to your customers. SureStart® II herbicide controls more than 60 difficult weeds and can be applied from early preplant up to 11-inch corn. For more information, visit GetMoreTime.com or contact your local Dow AgroSciences sales representative.

®Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow. SureStart II is not registered for sale or use in all states. SureStart II is not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2015 Dow AgroSciences LLC