Disease Digest

Deere sprayer, corn

In the fungicide world, 2007 will be memorable for its flurry of foliar fungicide applications, especially in corn, but not because diseases were rampant. No, many of these applications targeted the health of the crop.

This is just one of the key topics our in-house advice columnist, Rusty Beane, will discuss in this final installment of the Crop Protection Review series. Like Reid W. Acker and Bugsy B. Gohn, Beane is a fictional character based on a combination of almost two decades of staff background in crop protection, along with recent interviews with Extension plant pathologists and fungicide product managers.

Dear Rusty: What key diseases should we keep an eye on this year?

As always, weather will play a key role. There have been reports that 2008 will be a dry season. “According to weather experts, the drought in the Southeast in 2007 may be a precursor for drought in the Midwest in 2008,” explains Daren Mueller, Iowa State University Extension plant pathologist. “In that case, we may see a different set of diseases on corn and soybeans. For example, Aspergillus ear rot on corn and charcoal rot in soybeans can be more severe when weather conditions are dry,” he says. Charcoal rot can show up in corn, too.

“If the trends that we have seen the past few years continue, other diseases on soybeans that are more severe in Iowa are sudden death syndrome (SDS) and frogeye leaf spot,” Mueller says.

Dear Rusty: Are there any new fungicides for corn or soybeans in ’08?

There are two, both for soybeans.

Ballad Plus biofungicide from AgraQuest is registered for Asian soybean rust, powdery mildew, coercospora, and brown spot. Based on a patented strain of Bacillus pumilus, it offers broad-spectrum control or suppression of many key plant diseases and is an excellent fit in disease control programs of both conventional and organic production.

2008 New Fungicides
 Product  Company  Active Ingredient(s)
 Ballad Plus  AgraQuest  Bacillus pumilus
 Nevado  MANA  iprodione

Makhteshim Agan of North America, Inc. (MANA) received EPA approval for Nevado fungicide, which contains iprodione, the active ingredient in Rovral. While its primary targets are specialty crops, it also has been approved for use against black leaf blight in soybeans in small areas in the Western U.S.

Dear Rusty: I hear that Extension scientists are still on the fence about using Headline on corn, but then my BASF rep says the Plant Health benefits of Headline really work. What do I tell my growers?

Oh, my, now that’s a bit of a pickle. Not all Extension researchers should be painted with the same brush, but overall, many are hesitant to jump on BASF’s Plant Health program bandwagon until they see their own research results, and I can understand that. “We’re sort of unpopular for saying there isn’t much yield response, although this has been what our research has shown to date; growers don’t want to hear that,” Mueller says.

There has been minimal soybean yield response to fungicides in Iowa, for example, although individual fields responded well. The response is more mixed in Iowa corn, though. “There are fields that get yield benefit and others that have yield loss,” he says.

The potential for stronger stalks and better yields with today’s higher crop prices is especially enticing for growers with larger acreage. Narrowing down the various factors that could impact preventive fungicide benefits and increase the potential for positive economic response should be the goal of researchers, Mueller says. 

As in 2007, we can expect growers to be willing to spend input dollars to ultimately increase yield.

And BASF’s numbers appear to back its claims. The company released results of its on-farm trials in early January: In the more than 1,150 on-farm trials conducted across the U.S. in 2007, the average yield increase of Headline-treated corn ranged from 12 bushels per acre (bu/A) to 16 bu/A, while Headline-treated soybeans increased by an average of 4 bu/A to 8 bu/A. BASF estimates that in 2007, U.S. corn and soybean growers who used Headline produced an additional $450 million worth of grain.

According to BASF, that works out to an extra profit of $34 to $51 per acre for corn growers and $28 to $74 per acre for soybean growers, estimated at current commodity prices and average application costs.

Most of Headline was applied by air, and Midwestern aerial applicators called on their Southern brethren to help cover the extra acreage in 2007. “We had an astronomical increase in demand for aerial applications in 2007, from 8,000 to 80,000 acres, and I think we’ll see another big increase in 2008,” says Craig Bair with AgFlight, Inc., who services the York, NE, area.

2008 Label Changes
 Product  Company  Label Change(s)
 Bumper  MANA  Added Asian soybean rust, frogeye leaf spot, brown spot, anthracnose, aerial web blight in soybeans.
 Domark Valent U.S.A. Corp. Received full Section 3.
Headline BASF Corp. At the VT stage or later in corn, may be used with adjuvant; do not use adjuvant prior to full tassel stage; application rate reduced for corn; eyespot added to 2(ee) label; REI shortened to 12 hours.
Headline BASF/Monsanto Agreement created between BASF and Monsanto to co-promote.
Laredo Dow AgroSciences Full Section 18 label.
Quilt Syngenta Rate reduced for aerial application; REI now 12 hours.
Punch DuPont Crop Protection Continued Section 18 label.
Stratego Bayer CropScience Updated label in soybeans, corn.

What does all of this mean to your business? At least some of your grower-customers will use Headline or another foliar fungicide this year, so why not use that to your advantage? Do some test plots of your own to get a better sense of which soils, weather factors, hybrids, production practices, etc. take to a crop health system best in your service area. Be sure to follow up at grower meetings and in one-on-one planning sessions next winter.

Dear Rusty: Our dealership is in the Midwest and Asian soybean rust has yet to affect our soybean yields. Is there any reason to be very concerned about it this year?

Asian soybean rust is a disease we’re still getting to know, and 2007 proved beneficial to the learning curve because rust became more widespread. “Last year, we learned a lot about how well we can predict rust,” says Mueller.
But you’re right, what yield loss there’s been has been in the South and Southeast, where soybean rust has built a stronghold the past three seasons. For others, by the time rust made it to their fields, the soybeans were past the reproductive stages, their pods were set, and yields were not affected.

Many fingers point to the lack of moisture for the fairly quiet invasion. Remember, an Asian soybean rust epidemic will require three elements: leaf wetness from rainfall or high humidity; susceptible host plant (usually kudzu and soybeans); and spores that are still viable when they land on the soybean plant.

“My fear is that we’ve had three extremely unusual years environmentally, especially when you look at the drought in the Southeast,” says Anne Dorrance, Ohio State University Extension plant pathologist. “That drought in the Southeast really kept things quiet last year.” If it turns out to be a wetter-than-average year in the wrong places, more areas could well have soybean fields with rust-induced yield losses.

One of the smartest things you can do for your growers is to never let your guard down and monitor USDA’s impPIPE (Integrated Pest Management-Pest Information Platform for Extension and Education) Web site throughout the season at www.sbrusa.net.

The key is not if soybean rust shows up in fields, but when and how much inoculum the wind brings into an area — and the Southeast and South hold the key for everyone else. “You have to have a certain quantity of rust in the South before it’s going to economically impact the northern states,” she says. There are two major wind patterns that will move rust northward, so states along the Eastern part of the U.S. need to watch what happens in states like Florida, Georgia, and Alabama; while those in the rest of the Midwest should keep an eye on Mexico and adjacent states.

“Certainly any inoculum buildup in areas like Texas, Louisiana, and Mexico does not bode well for soybean strongholds like Iowa,” adds Mueller.

Dear Rusty: My grower-customers like using fungicide seed treatments. Anything new on that front?

BASF just received registration for Stamina fungicide in late February. Derived from pyraclostrobin, the same active ingredient used in BASF’s Headline, Stamina will be marketed for corn seed.

The company tells me that seed and seedlings are better protected from key diseases such as Rhizoctonia and stress tolerance is improved. According to BASF, this is particularly important because of the earlier planting that we’re seeing more of and the increased use of no-till production systems may lead to slower emergence of seedlings in the cool, wet soils. “This delivers healthy plants right out of the ground as corn seedlings have a strong start, resulting in increased yield potential,” says Craig Lindholm, marketing manager, seed treatments at BASF U.S. Crop Protection Products.

Leave a Reply

Fungicides Stories

Winter Wheat
FungicidesSyngenta Receives Approval For Fungicide ADEPIDYN In Argentina
November 15, 2016
Syngenta has announced that MIRAVIS Duo, a combination of ADEPIDYN and difenoconazole, has been approved by SENASA (regulatory authority in Read More
Topguard premix fungicide
FungicidesFMC Launches New Topguard EQ Fungicide Premix
November 10, 2016
FMC Corp. announces the launch of a new fungicide premix called Topguard EQ fungicide that provides long-lasting disease control and Read More
Soybean Closeup
FungicidesFMC Begins Registration Process For New Fungicide Active Ingredient
October 19, 2016
FMC Agricultural Solutions has begun the joint U.S. EPA and Canadian Pest Management Regulatory Agency registration process for bixafen, a new Read More
Soybean Field
FungicidesSyngenta Launches Interactive Tools For Vibrance Seed Treatment Fungicide
August 30, 2016
As part of the ongoing commitment to provide growers and retailers with the most current crop protection products and agronomic Read More
Trending Articles
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
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
STS16 2017
SprayersHagie Manufacturing Releases 2017 STS16 Sprayer To Market
November 16, 2016
Hagie Manufacturing LLC’s largest full season applicator is now available with enhancements for the 2017 model year. Hagie is officially Read More
Latest News
ManagementARA 2016 Report and Crop Mix for 2017
December 9, 2016
Editors Paul Schrimpf and Eric Sfiligoj talk about the recent Agricultural Retailers Association meeting and the projected acreage mix for Read More
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In …
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
Ryan Bartlett
Crop InputsCompass Minerals Appoints Vice President, Innovation An…
December 8, 2016
Ryan Bartlett, Ph.D., has joined Compass Minerals as vice president, innovation and product development. Dr. Bartlett will be responsible for Read More
HerbicidesHerbicides 2017: New Cropping Systems Set For Debut
December 7, 2016
Herbicide-resistant weed are inching ever-closer to a potentially frightening saturation point here in the U.S. Heading into 2016, USDA planting Read More
CropLife 100Wilbur-Ellis Acquires Michigan Ag Retailer
December 7, 2016
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
Fertilizer storage The Andersons
CropLife 1002016 Fertilizer Report: Another Really Rough Year For A…
December 7, 2016
In many ways, the fertilizer category cannot seem to catch a break. During the early part of the 2010s decade, 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
Winter wheat
HerbicidesTalinor Herbicide Approved For Wheat And Barley
December 7, 2016
Talinor herbicide from Syngenta has received federal registration from the U.S. EPA, giving wheat and barley growers a new option Read More
Forage Sorghum
UncategorizedMilestone Achievement Continues For Dow AgroSciences, A…
December 7, 2016
New and innovative forage products are on the horizon driven by continued collaboration between Dow AgroSciences, a wholly owned subsidiary Read More
Palmer pigweed seedhead in cotton
HerbicidesNew WSSA Factsheet Explores Weed Seeds And Their Longev…
December 7, 2016
Did you know some weed seeds can lie dormant in the soil for more than a century and then sprout Read More
Crop InputsARA 2016: 5 Developments Worth Monitoring Into 2017
December 6, 2016
You can pretty much set your watch to it (do people even still wear watches? I know I do…but I’m Read More
Tim McCardle, ARA Chairman
CropLife 100BRANDT COO Named ARA Chairman
December 5, 2016
BRANDT EVP and Chief Operating Officer Tim McArdle has been named chairman of the Agricultural Retailers Association (ARA) during a Read More
Crop InputsWilbur-Ellis Receives ResponsibleAg Certification At Mo…
December 5, 2016
Wilbur-Ellis Co., a recognized leader in precision agriculture technology and the distribution of crop protection products, announces the ResponsibleAg certification Read More
Young Corn Closeup
Eric SfiligojThe Read On 2017 For Agricultural Fortunes Is Anybody’s…
December 5, 2016
As I (and others) have written in recent months, the nation has just experienced one of the most offbeat election Read More
Acceleron B-300 seed coating
Crop InputsThe BioAg Alliance Launches New Yield-Boosting Microbia…
December 5, 2016
As part of their commitment to develop and commercialize innovative microbial solutions for farmers through The BioAg Alliance, Monsanto Co. Read More
ManagementCorn and soy planting update; Takeaways from Climate Co…
December 2, 2016
AgriBusiness Global Editor Dave Frabotta Joins Paul Schrimpf for a discussion of global corn and soybean planting trends, and a Read More
Radish cover crop taproot
Crop InputsSoil Health Institute, Datu Research Receive Grant To E…
December 1, 2016
The Soil Health Institute (SHI) and Datu Research have announced a $626,000 grant from the Walton Family Foundation to quantify the Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More