Fungicides Commanding New Attention

A funny thing’s happened on the way to a possible Asian soybean rust epidemic in the U.S. Researchers at both chemical companies and universities are discovering more benefits of fungicide use on both soybeans and corn.

“Danger of rust has brought the awareness of fungicides to the fore,” says Randy Myers, fungicide product manager with Bayer. “There’s been a lot of testing of them on soybeans to see what they do in the absence of rust — then that’s moved on to corn.”

Don’t Rest On Rust

While the past two seasons have been relatively dry — literally and figuratively — for rust in the Midwest, companies and researchers CropLife® talked with continue to sound the alarm. “If the conditions are right, it’s the most aggressive disease I’ve experienced in my agricultural career over 30 years,” says Mats Edh, vice president, marketing with Cheminova.

“We’ve gone through two of the hottest, driest seasons on record in the South and even though rust got established fairly early in 2006, it doesn’t like that weather, so it didn’t spread much at all,” says Dr. Gary Fellows, technical marketing manager at BASF. “If we have a cool, wet spring, and the rust does get established, it can move quickly like it demonstrated in 2006,” says Jamie Nielson, Domark brand manager with Valent.

Later in the 2006 season, the disease was found in Mexico and Texas, and if discoveries of the spore are made earlier this year, there’s greater danger for Midwest soybeans. Myers explains that prevailing wind directions in the U.S. more easily carry inoculum from those areas than from the Southeast — from where the spores need to play hopscotch to travel north. “A lot of weather patterns from the Southwest can move it right up the Mississippi River and into the major soybean growing areas,” he explains.

A number of company reps believe our industry still doesn’t have a really good handle on what the disease will do under U.S. environmental conditions — the climate in Brazil where rust first hit hard is just too different to make too many projections for this continent.

“Soybean rust isn’t hard to fight, there are a lot of tools out there shown to be effective,” says Bayer‘s Myers, whose company offers Folicur (tebuconazole), a top seller in Brazil. “But timing is critical. Each product needs to be applied within its proper application window, and some products have a narrower window than others. Retailers and growers need to understand the strengths and weaknesses of each of their chemical options to get the best disease activity.”

At the National Soybean Rust Sym­posium, the triazole class was touted as the best for soybean rust control, Nielson reports. “Last year, even at the university level, it was not clear what to use. This year, they’ve got more exposure with rust in the U.S.” He notes that there are currently seven or eight triazoles “out there,” all waiting for Section 3 clearance, including Valent’s Domark (tetraconazole).

“The triazoles have both curative and preventative activity. The curative part is important, since it’s difficult to know if you have the disease in the field when you spray,” says Edh, His firm Cheminova makes TOPGUARD (flutriafol). Even better can be a premix of a triazole with a strobilurin, as in Syngenta‘s Quilt, says Jamie Eichorn, fungicide product manager — who cites field trials by numerous university researchers.

Myers notes that Southwest growers have become accustomed to using fungicides on soybeans for the past five to seven years because they’ve been going after other diseases such as Cercospora and aerial blight. “That mentality will serve as a template for growers farther north that really haven’t had a need for applying fungicides.”

Retailers will play a key role in helping farmers determine whether to spray for rust, says Nielson. He says his company receives grower e-mails forwarded from USDA’s rust Web site. “We’ll then forward them to our sales force and they send them on to the retailers. We really rely on the retailers to be the vocal point. We focus on educating them, to make sure they’re more aware of rust and its movement.”

Valent offers Domark 230ME, a micro-emulsion formulation specifically designed for soybeans that’s awaiting Section 3 approval. The company says the formulation pours very nicely, has no odor — and helps spread across the plant, then be actively absorbed by the leaf.

Corn Gets A Dose

While rust often grabs the spotlight, experts agreed that gray leaf spot infestations were on the rise last year in corn, due in part to the move to reduced tillage — which provides a cozy place for inoculum numbers to grow. “With the potential for increased acres and more corn on corn rotations, the potential for gray leaf spot could increase in ’07 due to overwintering of the inoculum on residue,” says Syngenta’s Eichorn. He reports growers using Quilt saw an average increase of 15.5 bushels/acre more than an untreated check.

Bayer’s Myers notes that gray leaf spot is a real problem for growers in the Plains states where irrigation keeps moisture levels high. “The activity of Stratego, on the disease is excellent, so growers saw a very nice yield bump,” says Myers. The product, a triazole/strobilurin combination, has been a top performer in rice — even credited with improving milling quality as well as yield — but it wasn’t until last season that the product impacted corn.

The tricky part for fungicide application on corn is how. Timing to apply is around tassel/silk initiation when plants are huge. “A lot more airplanes will be spraying fungicides on corn than what we’ve had historically,” says Myers.

Perhaps even more dicey: convincing Midwest growers they even need a late-season fungicide, especially considering there hasn’t been a massive disease infestation since Southern corn leaf blight back in the ’70s. “It’s going to take a shift in their paradigm to suddenly think there are inputs and concerns later in the season. These are new tools that can help increase yields,” says Myers, whose family has farmed for generations without late-season applications. Typically growers have relied on breeding programs to build resistance into hybrids so that diseases have only caused a small yield drag. Newer, much more effective classes of chemistries in recent years are debunking old ideas that fungicides can’t help.

Troy Bettner, senior product/marketing manager for fungicides with Makhteshim Agan of North America, says that 18 trials with Bumper (propiconazole) logged an average yield increase of 10 bushels/acre of corn. The fungicide — as well as the company’s Orius formulations (tebuconazole) — have Section 18 labels.

BASF reports 12 to 15 bushel/acre yield increases with Headline (pyraclostrobin) applications. Why the gain? “Besides gray leaf spot, we know there are diseases out there, but they’re not always evident to growers,” says Gary Fellows, product manager with BASF.

Plant Health Means Higher Yields

But the enhanced productivity of strobilurin-treated crops can no longer just be attributed to good disease control. In both soybeans and corn, better plant performance because of fungicide applications became more evident in 2006. Fellows says Headline makes plants healthier, more efficient in plant growth, and more resistant to stress. “We’ve had reports out of Texas and Mississippi, where there was a lot of drought stress. Once they did get a rain, Headline-treated corn came out of the drought very rapidly with less damage. Hail damaged fields also came out quicker and out-yielded untreated crops,” he says. Growers said combining was easier and more efficient because plants weren’t lodged — stalks were stronger.

“In soybeans we’re seeing a very similar thing,” he adds. Indeed, Kip Cullers, the Missouri grower who logged the 2006 World Record soybean yield at 139 bushels/acre, credits a part of success to Headline. (Fellows also points out that Headline is providing “one of the highest levels of rust control” as well as controlling other yield-robbing soybean diseases such as frogeye and septoria.)

“We’ve found that Quadris inhibits the release of ethylene in the plant, delaying senescence, and resulting in longer retention of plant leaves. It also decreases transpiration, which makes the plant more tolerant to water loss and water stress,” explains Syngenta’s Eichorn. Carbon dioxide “assimilation” is improved, allowing the plant to use the sun’s energy more efficiently (photosynthesis) to create better canopy growth and healthier plants, he explains.

Our experts encouraged dealers to use the Web to find other information showing yield advantages from fungicide applications under various conditions. Says Myers: “Retailers need to be looking for information germane to their geography so they can communicate to the growers that there’s a real benefit out there. The biggest challenge I think retailers will be facing is convincing growers there’s something else that can bump up those yields.

“It’s a change in the way growers approach things. We’ll see this coming season just how widely accepted it becomes.”

Leave a Reply

Fungicides Stories

Soybean Closeup
FungicidesNew CROSSOVER PRO Formulation Offers Insect and Disease Control
March 29, 2017
INNVICTIS CROP CARE, LLC has launched CROSSOVER PRO as a first of its kind formulation combining propiconazole and lambda-cyhalothrin for Read More
Retailer Wheat
Crop InputsGrowers Looking For Selectivity, Flexibility With Fungicide Options
February 5, 2017
Selectivity remains the name of the game in 2017. “People that were more selective last year and didn’t get burned Read More
Young Corn Closeup
FungicidesArysta LifeScience Receives EPA Approval On New In-Furrow Products
February 2, 2017
Arysta LifeScience North America recently received EPA approval on two new products, both of which feature patented formulation technology that Read More
FungicidesSudden Death Syndrome In Soybeans Can Often Go Overlooked
January 26, 2017
Because the symptoms of SDS appear similar to many other soybean diseases, SDS can be easily overlooked, according to Damon Read More
Trending Articles
Nutrients for Life Foundation Teacher
FertilizerNutrients For Life Foundation Celebrates 10 Years Teaching Fertilizer Education
March 23, 2017
Those in agriculture know fertilizer is a vital ingredient to grow strong, productive crops. In fact, fertilizer is responsible for Read More
AdjuvantsA New Weed-Control Era Begins: But First, One Last Obstacle
March 4, 2017
There is trepidation, there is reluctance, and there is excitement. Ag retailers feel it all about the new dicamba and Read More
LIFT Academy video screenshot
Crop InputsLIFT Agriculture Academy: A Q&A With West Central Distribution’s Dean Hendrickson
March 1, 2017
West Central Distribution recently launched its LIFT Agriculture Academy, a new, premiere training and professional development resource for West Central’s ag Read More
Farmer and aptop
Matt Hopkins10 Warning Signs Your Website Is Grossly Outdated
February 8, 2017
Your Website is often a visitor’s first impression of your ag retail business. A positive first impression can set the Read More
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In 2017
December 9, 2016
Ag professionals are working smarter, not harder, than ever before. Smart farming technologies have enabled them to reduce costs, maximize Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Latest News
Soybean Closeup
FungicidesNew CROSSOVER PRO Formulation Offers Insect and Disease…
March 29, 2017
INNVICTIS CROP CARE, LLC has launched CROSSOVER PRO as a first of its kind formulation combining propiconazole and lambda-cyhalothrin for Read More
Trade Summit
Crop Inputs3 Compelling Reasons to Attend the AgriBusiness Global …
March 29, 2017
The AgriBusiness Global Trade Summit is the world’s premier sourcing event for crop protection and plant health products. Its core Read More
ManagementStudy: Farming Becoming Riskier Under Climate Change
March 28, 2017
Scientists the world over are working to predict how climate change will affect our planet. It is an extremely complex Read More
Young Corn Plants
Crop NutritionProtecting Nitrogen Provides Economic, Environmental RO…
March 28, 2017
Every business looks to improve its return on investment and reduce its risk of loss. Farmers are no different, yet Read More
Water Drainage
Eric SfiligojDMWW Lawsuit Dismissal Good News for Ag
March 27, 2017
On March 17 while most of the nation was toasting St. Patrick’s Day, agriculture was likely lifting a glass (or Read More
Eric Jenks, Wilbur-Ellis
Crop InputsWilbur-Ellis Launches ADVANTIGRO Plant Growth Regulator…
March 27, 2017
Wilbur-Ellis Agribusiness, a recognized leader in the marketing and distribution of crop protection, seed and nutritional products, as well as Read More
Yara West Sacramento Ribbon Cutting
Crop InputsYara West Sacramento Is Newest Addition
March 27, 2017
Yara’s West Sacramento Terminal was officially welcomed March 21 as the newest Yara North America facility in the U.S. While continually Read More
UncategorizedPrecision Ag, Iowa Water, and GM Corn Updates
March 24, 2017
Editors Paul Schrimpf and Eric Sfiligoj look at the state of precision agriculture, the dismissal of the Des Moines Water Read More
Pam Marrone
Crop InputsMarrone Bio Innovations Enters Biostimulants Market Wit…
March 23, 2017
Marrone Bio Innovations, Inc. is expanding beyond biopesticides and crop protection and into the biostimulant market by commercially launching Haven Read More
Nutrients for Life Foundation Teacher
FertilizerNutrients For Life Foundation Celebrates 10 Years Teach…
March 23, 2017
Those in agriculture know fertilizer is a vital ingredient to grow strong, productive crops. In fact, fertilizer is responsible for Read More
ManagementThink You Know Water? Take WinField United’s R…
March 22, 2017
Water is among our most precious resources, and arguably the hardest working, with just one percent available for human use, Read More
Corn Field
LegislationTFI Hopes Court Dismissal Is ‘Final Chapter’…
March 20, 2017
The Fertilizer Institute (TFI) released the following statement from President, Chris Jahn on the March 17, 2017, federal court dismissal Read More
Wheat Growers
Industry NewsWheat Growers CEO Dale Locken To Retire
March 20, 2017
CEO Dale Locken has announced that he plans to retire from Wheat Growers. Locken has served almost 15 years as Read More
Bayer Monsanto
Eric SfiligojBayer-Monsanto: Life, LibertyLink, And The Pursuit Of R…
March 20, 2017
As the calendar officially turns to spring, life is in full renewal mode. Flowers are blooming, birds are singing, and Read More
Corn Field
Crop InputsUltra Yield Micronutrients Acquires Kronos Micronutrien…
March 16, 2017
Ultra Yield Micronutrients, Inc. ”Ultra”, an affiliate of Cameron Chemicals, Inc., is pleased to announce that it has acquired the Read More
ManagementSnowstorms, Asset Sales, and Soybeans Prices
March 16, 2017
Editors Paul Schrimpf and Eric Sfiligoj discuss the weather, precision ag, crop protection company mergers, and commodity prices in this Read More
Soybean Field
Seed/BiotechBayer Invests $8.1 million In Soybean Advancement In Th…
March 16, 2017
Growers in Illinois and across the Midwest now have the added benefit of a state-of-the-art soybean research facility, increasing accessibility Read More
CHS
CropLife 100CHS Acquires Western Co-op Transport Association
March 16, 2017
CHS Inc., North America’s leading farmer-owned cooperative and a global energy, grains and foods company, has purchased Western Co-op Transport Read More