Top Pest Threats To Soybean Production

University of Illinois researchers identified the top pathogens, pests and weeds affecting soybean production in a recent article in Food Security. Soybean aphid, soybean rust, soybean cyst nematode, Sclerotina stem rot and the exotic pathogen, red leaf blotch, were featured as some of the top biotic constraints that may affect soybean production now and in the future.

“Enormous potential exists to increase future soybean production,” said Glen Hartman, U of I professor of crop sciences and USDA-ARS research scientist. “Genetic resources, used through both traditional breeding and bioengineering, may provide the solutions needed to combat current and future disease problems.”

As soybean production has increased over the past 50 years, so has the intensity of biotic constraints that ultimately threaten yield.

“Where soybean is grown every year or even every other year, pathogens often have increased in density to cause economic losses in yield,” Hartman said. “Parasitic microorganisms, including bacteria, fungi, nematodes, Oomycetes, and viruses all contribute to economic damage. A similar story occurs for pests; many, such as aphids, beetles, mites, and stinkbugs, cause considerable economic damage to the soybean crop.”

Although aphids, rust, nematode and Sclerotina stem rot are commonly known and recognized by soybean growers, less information is known on red leaf blotch, an exotic disease caused by the fungal pathogen Phoma glycinicola, he said.

“The fungus that causes red leaf blotch is listed on the USDA Agricultural Select Agent List — the same list as anthrax,” Hartman said. “So far, this disease has only been reported in Africa. However, if red leaf blotch is found in the United States, a recovery plan through the USDA-APHIS program has been developed that outlines a course of action to prevent it from spreading.”

Red leaf blotch symptoms include lesions on foliage, petioles, pods and stems. The fungus does not appear to be seedborne, but may be transported along with soil and other debris in grain. Yield losses of up to 50 percent were documented in Zambia and Zimbabwe in the 1980s.

“We don’t want to scare people because this disease has not been found in the United States,” Hartman said. “But we do want growers to be aware of it because they are typically the ones to find new pathogens, pests and weeds in their fields. Our goal is to build awareness among crop specialists and producers so we can stay ahead of it.”

Hartman said more research is needed to develop molecular diagnostic techniques to identify this pathogen from other common foliar soybean pathogens, to provide better information on fungicide chemistry and application timing, to develop varietal resistance and gather more data to develop predictive models for potential containment and management.

To successfully reduce losses due to pathogens and pests, a number of practices used alone or in combination may be needed; these include cultural and seed sanitation techniques, pesticide applications, and deployment of soybean cultivars with resistance.

“Biosecurity of food crops is important because we don’t want to suffer food shortages — whether it’s due to natural disasters or pathogens and pests that we can sometimes control,” Hartman said. “If you are talking about food and crop improvement, you are always talking about reducing diseases and pests.”

(Source: Illinois Ag Connection)

Leave a Reply

Fungicides Stories
FungicidesSudden Death Syndrome, Brown Stem Rot Reported In Indiana Soybeans
September 3, 2014
Farmers and retailers should be watching for symptoms of these two diseases over the next few weeks as they are best managed through preventative methods. Read More
FungicidesResearchers Target Soybean Disease With Genetic Resistance Study
August 6, 2014
University of Illinois researchers will share new information on controlling sudden death syndrome through genetic resistance at this year's Agronomy Day. Read More
Soybean field
FungicidesValent Launches New Seed Protection Fungicide For Soybeans
July 16, 2014
The INTEGO SUITE System contains the first new, novel seed protection fungicide chemistry registered in 30 years by the EPA for protection against Pythium and Phytophthora. Read More
FungicidesNew Players May Make Pest Headlines In Corn, Soybean
April 1, 2014
The usual insects and diseases took a bit of a break in 2013, but other culprits surfaced — and could return. Read More
Top 100 Articles
CropLife 100Pinnacle Agriculture Acquires Minnesota Retailer
April 14, 2015
Pinnacle Agriculture Holdings, LLC, ranked No. 6 on the CropLife 100,  has successfully acquired Liebl Ag, LLC in Ada, MN.  Read More
CropLife 100CHS, Aurora Cooperative Complete Fertilizer Storage, Grain Shuttle Loading Facility
April 13, 2015
CHS Inc., the nation’s leading cooperative and ranked No. 5 on the CropLife 100, and Aurora Cooperative (ranked No. 21) Read More
CropLife 100GROWMARK Acquires Missouri Refined Fuels Terminal
April 2, 2015
Bloomington, IL-based GROWMARK and Magellan Pipeline Co. have entered into an agreement in which GROWMARK will acquire the refined fuels Read More
CropLife 100Wilbur-Ellis Acquires South Dakota Retailer
April 2, 2015
Wilbur-Ellis Co.’s Agribusiness Division, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed Read More
CropLife 100The McGregor Co. Closes Smith-Kem Acquisition
April 2, 2015
The McGregor Co. — ranked No. 16 on the CropLife 100 list of largest U.S. ag retailers — has completed Read More
CropLife 100BRANDT Commemorates National Ag Day
March 20, 2015
The Illinois agriculture community gathered at BRANDT global headquarters on March 18 to celebrate National Ag Day behind this year's theme Sustaining Future Generations. Read More
Latest News
Syngenta
Eric SfiligojWill Monsanto And Syngenta Combine This Time?
May 4, 2015
Under the heading of “never say never,” it sounds as if crop protection/seed giants Monsanto Co. and Syngenta are once Read More
Dr. Bryan Young, Southern Illinois University, shows tour attendees a female Palmer amaranth plant.
Crop InputsPurdue Weed Scientist Publishes Weed Resistance White P…
May 4, 2015
Resistant weeds, the appropriate use of herbicides and integrated weed management strategies are highlighted topics in the new white paper, Read More
Industry NewsMonsanto-Syngenta Mega-Merger Would Drive More Deals
May 4, 2015
A combination of Monsanto Co. and Syngenta AG would set the stage for even more mergers and acquisitions, reports Brooke Read More
InsecticidesAgrian Announces New California Feature
May 4, 2015
Agrian announced today that it has developed a feature within its recommendation writing program that will support the California Department Read More
Storage Tanks at Nachurs
FertilizerNachurs Alpine Solutions: Liquid Fertilizer With Precis…
May 4, 2015
When it comes to fertilizer options in 2015 and beyond, ag retailers are taking a long, hard look at liquid. Read More
West Central Sac City growers
StewardshipIowa Lawsuit Challenges Ag’s Water Quality Efforts
May 3, 2015
Nutrient problems in west-central Iowa’s water supply made national headlines in March when the Des Moines Water Works (DMWW) filed Read More
Tim Hassinger Dow AgroSciences President and CEO
Crop InputsDow AgroSciences: Always About Agriculture
May 2, 2015
When you consider their respective backgrounds, it’s little wonder why Dow AgroSciences and new President/CEO Tim Hassinger ended up together. Read More
Nozzle spray close-up
AdjuvantsSpray Drift Enters More Complex Era
May 1, 2015
Off-target movement of crop protection products has been a problem for decades. The issue got more contentious when glyphosate-tolerant crops Read More
Crop InputsTop 10 Twitter Pics For #Plant15
April 30, 2015
Growers and ag retailers are working feverishly to plant this year’s crop. Fortunately, many of them still have time to Read More
ManagementIowa Retailer Sticks Up For Agriculture and New Spray D…
April 30, 2015
Paul Schrimpf and Eric Sfiligoj talk about how one Iowa ag retailer is working to defend agricultural practices and an Read More
Dow AgroSciences Logo wall
Seed/BiotechNew Soybean Trait Agreement To Use Dow AgroSciencesR…
April 30, 2015
Dow AgroSciences LLC, a wholly owned subsidiary of The Dow Chemical Co., Arcadia Biosciences, Inc. and Bioceres, S.A. have formed an agreement Read More
Confluence of St. Croix and Mississippi Rivers in Minnesota
StewardshipAgricultural Runoff Among Causes Of Water Quality Issue…
April 30, 2015
A new report released April 29 by the Minnesota Pollution Control Agency provides additional evidence that agricultural and urban runoff Read More
EquipmentTop 30 IRON WORKS Cartoons Of All Time
April 29, 2015
When CropLife IRON first started publishing more than a decade ago, long-time Publisher Al Strohmaier decided to start a cartoon Read More
StewardshipCPS-Hillsboro Becomes First ResponsibleAg Certified Fac…
April 29, 2015
Unlike a race where the first finisher takes home a medal or blue ribbon, safety and regulatory compliance doesn’t often Read More
HerbicidesWeed Scientists Offer New Definition For ‘Superwe…
April 28, 2015
The Weed Science Society of America (WSSA) has joined with six sister organizations to recommend a new definition for superweed Read More
Crop InputsValent Announces “Relentless As You’ Contes…
April 28, 2015
Valent U.S.A. Corporation today announced the winners of its national “Relentless As You” contest, which recognized the relentless spirit of Read More
HerbicidesSyngenta’s Acuron Secures EPA Federal Approval
April 28, 2015
Growers looking to control difficult weeds like waterhemp, giant ragweed and Palmer amaranth will have access to Acuron corn herbicide Read More
FertilizerSimplot’s Gal-XeONE Technology Moves West
April 27, 2015
The J.R. Simplot Co. remains committed to creating customer value through technology. In 2013, Simplot purchased the Gal-XeONE controlled release Read More