Quietly, Rust Becoming More Active In South

Soybean rust, which survives on leaves of kudzu as well as soybean plants, was not active early this year in Gulf Coast states, where it is annually detected first during the growing season. Hot, dry weather, including severe drought in Texas, has kept the rust spores from spreading through the air.

The most recent report was in a commercial research plot in Marion County, FL on Aug. 17. Two days prior, soybean rust was reported in nine new counties in Mississippi, all in commercial soybean fields, and soybean rust could no longer be detected in Texas. On Aug. 13, soybean rust was reported in Tensas County, LA on soybeans, and in Suwannee County, FL on kudzu. In 2009, soybean rust has been found in seven states and 54 counties in U.S., and in two states and five municipalities in Mexico.

Florida
“Soybean rust is continuing to develop in Florida,” says James Marois, University of Florida plant pathologist. “Since Aug. 5, five new counties have become positive, and there are now 14 positive counties in Florida. Tropical Storm Claudette is bringing large amounts of rain to the panhandle and expected to travel northwest.

Marois advises Florida growers and retailers to “be on the lookout for soybean rust. With the recent rains and the maturing crop we are likely to begin to encounter field infections.”

Mississippi
Soybean rust was detected Aug. 13 in a commercial soybean field just west of Stoneville/Leland. According to Tom Allen, Mississipi State University (MSU) plant pathologist and Troy Koger, soybean Extension specialist, “the soybeans were at the R7 growth stage. Levels of rust within the field were low. The soybean field had NOT received an R3/R4 fungicide application.”

The following day, soybean rust was reported in commercial soybean fields in Carroll, Grenada, Humphreys, Leflore, Montgomery, Sunflower, Yallabusha, and Yazoo counties. “Rust levels were extremely low in all of the fields save for one field in Montgomery County, immediately east of Winona, MS,” say Allen and Koger. “All soybean fiels were beyond R5.7, so they are out of the woods and would not require treatment.

Louisiana
According to Clayton Hollier, Louisiana State University plant pathologist, “three commercial fields of soybeans were found to be positive this week — all in Iberia Parish. Incidences were 18 percent, 7 percent, and 4 percent respectively and were in either R7 to R8 depending on location.”

Hollier adds that “Tensas Parish was positive for one location in a research plot with 10 percent incidence. The beans were in R6-7.”

Texas
As of Aug. 15, soybean plants are maturing throughout Texas, at least at pod fill or more mature. However, there are plants in the seedling stage in the Lower Rio Grande Valley, which will be the fall crop there, according to Tom Isakeit, Texas A&M University plant pathologist.

“There is still no rust at any the soybean sentinel sites in Texas,” Isakeit says. “The rust at one kudzu site, in Livingston, Polk County, in east Texas, is no longer detectable. Continued dry weather in central and southern Texas will not support establishment and development of rust.

“Recent rains in east Texas have not increased the risk there, as there is apparently no source of spores to start an epidemic,” he adds. “At this time, no preventative fungicides are recommended anywhere in the state.”

Isakeit also observes that “mineral deficiencies — particularly iron — are becoming apparent in some fields undergoing moisture stress. Some of these symptoms may resemble rust.”

Missouri
Because of the proximity of the recent Arkansas and Mississippi detections, Missouri officials have put their soybean rust scouts on alert. The findings are about 250 miles from southeast Missouri.

“Soybean rust has not been detected in Missouri this year,” says Allen Wrather, University of Missouri (MU) Extension plant pathologist. “This is the first find of rust this year in those two states. The weather during the next few weeks will greatly impact the spread of rust.”

Soybean rust has been found in Missouri four of the last five years, but always late in September or October, near harvest. Wet weather in Missouri this spring delayed planting. “Soybean maturity and harvest will be later than normal,” Wrather says. “Rust that develops in September might damage late-maturing soybean plans and reduce yield.”

For most of the 2009 growing season, prevailing winds have been from the northwest, bringing cooler than normal weather to the region. That may change with the coming hurricane season, Wrather says.

Leave a Reply

Featured Stories
CropLife 100Pinnacle Expands Sanders Brand In The South
February 27, 2015
Pinnacle has acquired Hopkins Seed and Chemical in Qulin, MO, which expands the company's Sanders brand to nine Southern states. Read More
Crop InputsWinField Unveiling NutriVision Technology, Ascend Dry Formulation
February 24, 2015
New for 2015 are NutriVision Technology, a unique tool for monitoring in-season plant nutrient availability, and Ascend WSG plant growth regulator, a new dry formulation of Ascend plant growth regulator. Read More
Crop InputsVilsack To Deliver Commodity Classic Keynote Address
February 19, 2015
The secretary will deliver a keynote address to several thousand farmers and ag allies during the event's General Session, to be held Friday, February 27, in Phoenix, AZ. Read More
Ribbon cutting at 2015 National Farm Machinery Show
Matt Hopkins5 Key Takeaways From The 2015 National Farm Machinery Show
February 14, 2015
Celebrating its 50th anniversary, the largest indoor farm show in the country didn't disappoint with the latest in technology and trends on full display. Read More
Top 100 Articles
Wheat Growers, North Central Farmers Elevator Pursue Merger
CropLife 100Wheat Growers, North Central Farmers Elevator Pursue Merger
March 3, 2015
Two CropLife 100 retailers — South Dakota Wheat Growers (ranked No. 11) and North Central Farmers Elevator (No. 19) — have entered into a Letter of Intent to unify the two companies into a newly named cooperative. Read More
Growmark Group
CropLife 100GROWMARK In 2015: Back, To The Future
March 2, 2015
The nation’s third largest ag retail organization is simultaneously moving forward while remembering its past. Read More
CropLife 100Pinnacle Expands Sanders Brand In The South
February 27, 2015
Pinnacle has acquired Hopkins Seed and Chemical in Qulin, MO, which expands the company's Sanders brand to nine Southern states. Read More
CropLife 100Pinnacle Launches New Providence Agriculture Location In Indiana
February 27, 2015
Pinnacle Agriculture Holdings — ranked No. 6 on the CropLife 100 — has established a new retail location in New Castle, IN, which will operate as part of Pinnacle's Providence Agriculture brand. Read More
CropLife 100Cooperative CHS Returns $518 Million To Owners
February 23, 2015
The 2015 cash return to owners is based on CHS net income of $1.1 billion, the company's second highest on record. Read More
corn field
CropLife 100The Andersons’ Humic DG Now Available In Canada
February 13, 2015
The Andersons, Inc. Turf & Specialty Group has announced its Humic DG product is now available to customers in the Canadian turf, agriculture and horticulture markets. Read More
Latest News
Crop InputsCommodity Classic 2015 Sets Attendance High Mark
March 4, 2015
With nearly 8,000 total attendees, the 2015 Commodity Classic convention and trade show, which took place last week in Phoenix, AZ, shattered previous records for the landmark event, Read More
Young corn plants
FertilizerNew Nitrogen Stabilizer From Simplot Protects Fertilize…
March 4, 2015
By using OmniPierce Technology, Eclipse-N from Simplot Grower Solutions coats and protects more nitrogen, increasing nitrogen efficiency and decreasing loss due to volatilization. Read More
Industry NewsOhio Corn And Wheat Growers Association, Ohio Soybean A…
March 4, 2015
The associations truly appreciate the comprehensive approach and diligent work that the Ohio House of Representatives has dedicated to addressing water quality and House Bill 61. Read More
Mahindra Implement
Industry NewsMahindra USA Aligns With Paladin Attachment For Impleme…
March 4, 2015
Mahindra USA will begin utilizing Paladin Attachments as its implement supplier in April 2015. Read More
Crop InputsValent BioSciences Acquires Mycorrhizal Applications
March 4, 2015
The acquisition adds another strategic platform to VBC’s rapidly expanding global biorational business, providing additional tools for the Biorational Window platform being developed with its parent, Sumitomo Chemical Co., Ltd. Read More
Nutrients for Life Foundation - Plant Nutrient on the Farm Station
Industry NewsNutrients For Life Foundation Launches New Station Prog…
March 4, 2015
This ready-to-implement station provides an interactive opportunity for farms to showcase crop nutrients’ important role in growing healthy crops. Read More
Adjuvants loading
AdjuvantsAdjuvants Continue Upward Trend
March 4, 2015
A dizzying array of developments in crop protection technologies promise to make specialty adjuvants a crucial piece of the puzzle going forward. Read More
Wheat Growers, North Central Farmers Elevator Pursue Merger
CropLife 100Wheat Growers, North Central Farmers Elevator Pursue Me…
March 3, 2015
Two CropLife 100 retailers — South Dakota Wheat Growers (ranked No. 11) and North Central Farmers Elevator (No. 19) — have entered into a Letter of Intent to unify the two companies into a newly named cooperative. Read More
10 Tips for Spring Planter Preparation
Equipment10 Tips For Spring Planter Preparation
March 3, 2015
Kinze Manufacturing offers advice on how to ensure your planter is ready before you hit the field. Read More
Industry NewsOABA 2015 LAUNCH Program Recognizes 20 New Graduates
March 3, 2015
Twenty Ohio agribusiness leaders are being recognized as the latest graduates of Ohio AgriBusiness Association’s LAUNCH program. Read More
EquipmentNew AGCO Website Helps Customers Shop For Certified Pre…
March 3, 2015
RoGator sprayers are among the wide range of CPO equipment available through AGCO's site. Read More
Enlist spray Demo
HerbicidesGuiding New Herbicide Systems’ Launches
March 3, 2015
Under careful watch, the new 2,4-D- and dicamba-tolerant crops hit more acres this season. Read More
Eric SfiligojCommodity Classic 2015: Playing The Waiting Game
March 2, 2015
There was plenty of future-talk at this year’s event as companies (and growers) are largely in a holding pattern of sorts. Read More
Industry NewsHighway Equipment Appoints New Director Of Business Dev…
March 2, 2015
Cory Venable, who joined Highway Equipment Company (HECO) in 2013 as OEM Account Manager, has been promoted to Director of Business Development. Read More
Prairieland FS employees
Eric SfiligojWorkforce Worries
March 2, 2015
Finding good employees almost always ranks as the No. 1 or No. 2 problem for ag retailers in our annual CropLife 100 survey. Read More
Growmark Group
CropLife 100GROWMARK In 2015: Back, To The Future
March 2, 2015
The nation’s third largest ag retail organization is simultaneously moving forward while remembering its past. Read More
CropLife 100Pinnacle Expands Sanders Brand In The South
February 27, 2015
Pinnacle has acquired Hopkins Seed and Chemical in Qulin, MO, which expands the company's Sanders brand to nine Southern states. Read More
CropLife 100Pinnacle Launches New Providence Agriculture Location I…
February 27, 2015
Pinnacle Agriculture Holdings — ranked No. 6 on the CropLife 100 — has established a new retail location in New Castle, IN, which will operate as part of Pinnacle's Providence Agriculture brand. Read More