First ’09 Rust In Beans Confirmed

The first documentation of U.S. soybeans infested with Asian soybean rust in 2009 has been reported. Where and what are the implications?

Dr. Clayton Hollier, Louisiana State University (LSU) Extension plant pathologist, has documented the first find of soybean rust on soybeans in Louisiana and the U.S. for 2009.

“Soybean rust has been found in a soybean sentinel plot maintained by agricultural consultant Blaine Viator in the upper portion of Iberia Parish near
Coteau, LA,” according to Hollier. Viator made the discovery on June 6.

“The variety is unknown at this point but the crop is in the R4 growth stage,” says Hollier. “Incidence and severity are low currently. Confirmation was done in the field by Patricia Bollich using the Envirologics Quick-stix test.”

Don Hershman, University of Kentucky Extension plant pathologist, talked to Viator about the finding. “He said that the find was in a sentinel plot at the R4 stage,” says Hershman. “That is a fairly early stage for a first find of soybean rust and it is cause for some concern — but NOT alarm. Usually, the first find has been made in beans that are at a later stage of development.

“Blaine told me this is the first time that soybean rust has been found in soybean BEFORE his growers had a chance to make fungicide applications,” adds Hershman. “His point was not that they have ‘missed the boat,’ but rather to indicate the earliness of this find relative to what they are used to
seeing in southern Lousiana. To back up his statement, he told me about a rather large kudzu patch near an local apartment complex that LSU scientists regularly monitor, and that historically developed massive soybean rust infections later in the summer. He said that patch is now heavily infected and is showing profuse sporulation.”

Weather conditions in much of Louisiana have been favorable for rust for quite some time and “have been favorable for development and spread,” says
Hollier, who recommends that retailers and their grower-customers in southern and central Louisiana and in southern Mississippi should scout their fields.

Because of spring conditions, “this earlier-than-usual find does not come as a great surprise,” says Hershman.

A great many U.S. soybean acres have been planted later than normal this year, Hershman notes, but no one should hit the panic button yet. “This could increase the crop risk for soybean rust, but not necessarily so,” he cautions. “We could have a late-season dry period that shuts the disease down; or not. Time will tell, and I cannot rule anything in or out at this time."

Rust was confirmed on June 8 on a sample collected in late May from a soybean sentinel plot in Washington County, AL. Like the finding in Louisiana, it is the first this year on soybeans in Alabama. The earliest the disease has been found in soybeans in the state, the low level incidence was found on beans at the R2-R3 growth stage. The plot is located in near the town of Fruitdale.

Ag retailers servicing soybean growers should regularly check the soybean rust forecast on the ipmPIPE (Integrated Pest Management Platform for
Extension and Education). Visit sbr.ipmpipe.org/cgi-bin/sbr/public.cgi and click on the green rectangular button at right.

(Sources: Clayton Hollier, Louisiana State University and Don Hershman, University of Kentucky)

Leave a Reply

Latest News
Young soybean field
Industry NewsArysta LifeScience Announces New Business Unit Head For…
September 1, 2015
Arysta LifeScience North America announces the addition of Rico Christensen, Business Unit Head, North America. Christensen will have responsibility for Read More
Wilbur Ellis Pink Soybean Seed Treatment
Crop InputsWilbur-Ellis Goes Pink With Soybean Seed Treatments For…
September 1, 2015
This past year, proceeds of pink-dyed soybeans treated and sold to Wilbur-Ellis seed customers in Chester, SD, went to two Read More
SprayersNORAC Active Wing Roll Slated For More Sprayers
September 1, 2015
NORAC Systems, a member of the Topcon Positioning Group, announces the release of Active Wing Roll for RoGator, Apache, New Read More
Syngenta Sign
FungicidesSyngenta’s Newest Fungicide Receives EPA Approval
September 1, 2015
Syngenta announced today that its newest succinate dehydrogenase inhibitor (SDHI) fungicide – Solatenol – has received registration from EPA and Read More
Flooded corn in Indiana
Crop InputsDelaying The Fertilizer Decision
September 1, 2015
Comments gathered from several retailers recently evidenced a classic good-news-bad-news scenario. Good news is prices and supplies of nitrogen, phosphate, Read More
StewardshipBee Buffer Strip Initiative Seeks 100 Ohio Farmers
August 31, 2015
The U.S. Bee Buffer Project, an initiative of the Pollinator Partnership (P2), Burt’s Bees and The Burt’s Bees Greater Good Read More
2015 ShowStopper Award, MAGIE
EquipmentA ShowStopper From Case IH: The Patriot 2250
August 31, 2015
For nine years now, visitors to the yearly Midwest AG Industries Exposition (MAGIE) show have been tasked with not only Read More
Crop InputsMonsanto, FMC Expand Roundup Ready PLUS Platform
August 31, 2015
FMC Corp. and Monsanto Co. announced today an expanded agreement to continue their participation in the Roundup Ready PLUS Crop Read More
Deere Nutrient Applicator
Eric SfiligojThe Good & Bad News From MAGIE
August 31, 2015
As I write this column, I’ve just returned from the annual Midwest AG Industries (MAGIE) trade show in Bloomington, IL. Read More
CPS Morenci receiving its 4R certification
StewardshipCPS Morenci Becomes First Michigan Facility Certified I…
August 31, 2015
The 4R Nutrient Stewardship Certification Program has announced that Crop Production Services, Inc.’s facility located in Morenci, MI, has been Read More
EquipmentDeere Announces Soucy Track Distribution Alliance
August 28, 2015
John Deere announces an alliance with Soucy Track to sell and distribute products through the John Deere dealer channel. “This Read More
FertilizerFall-Applied Phosphorus: A Rooted Investment
August 28, 2015
As commodity prices decrease and input prices continue to rise, farmers are seeking more efficient strategies for meeting a high Read More
Monsanto Sign
Crop InputsWhat’s Next For Monsanto, Syngenta?
August 28, 2015
After dropping its $47 billion bid to take over Swiss agribusiness firm Syngenta, Monsanto may be turning its focus to Read More
Golden Harvest Corn stalks
Crop InputsMonsanto: Syngenta Not The Only Horse In Crop Protectio…
August 28, 2015
Monsanto Co, having ditched an audacious $46 billion (£30 billion) offer for Syngenta AG, may downshift to a humbler strategy Read More
ManagementConsolidation hits and a miss; And a look at China’s ch…
August 28, 2015
As Monsanto suspends its pursuit of Syngenta, consolidation news at the retail and distribution level heats up. CropLife magazine’s Executive Read More
Corn Field
MicronutrientsHuma Gro Introduces New Boron Liquid Nutrient Formulati…
August 28, 2015
BORO-MAX, a new boron (B) 10% liquid nutrient formulation, has been added to the Huma Gro product line. This new Read More
Crop InputsNFU: Monsanto Decision To Withdraw Syngenta Bid ‘…
August 26, 2015
National Farmers Union (NFU) President Roger Johnson said the organization was very pleased by the news that Monsanto has withdrawn Read More
Crop InputsMonsanto Withdraws Bid For Syngenta
August 26, 2015
Monsanto Co. abandoned its latest effort to acquire Syngenta AG, the world’s top maker of pesticides, after a sweetened bid Read More