Research proves herbicide selection non-issue with SDS

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

The world’s most widely used weed killer is not responsible for perpetuating Sudden Death Syndrome (SDS) in soybeans, research shows.

A collaborative effort among soybean researchers in the United States and Canada and found that glyphosate does not increase SDS severity or adversely affect yields in soybean fields. Scientists from five Midwest universities and the Ontario Ministry of Agriculture Food and Rural Affairs, led by Daren Mueller of Iowa State University (ISU) in Ames, participated in the three-year study. Yuba Kandel of ISU analyzed the data.

“A common claim out there is glyphosate is making SDS worse,” said Mueller, a plant pathologist specializing in SDS and other soybean diseases. “This research proves that there are other factors much more important to the development of SDS than herbicide selection.”

The syndrome is caused by a fungus that lives in the soil and enters plants through their roots, causing them to rot. Toxins cause yellow and brown lesions on leaves, and pod fill is compromised. SDS is more prevalent if soil is wet, cold and compacted during germination and early reproductive stages.

Fifteen field experiments were conducted in Iowa, Illinois, Indiana, Michigan, Wisconsin and Ontario, Canada from 2011-13. Six herbicide combinations of non-glyphosate and glyphosate, including pre- and post-emergence, were tested. Single and multiple applications were also compared.

There were no statistically significant effects of herbicide treatments or interactions on SDS severity, data showed.

SDS outbreaks have been relatively low in Iowa the last three years mostly due to dry summers, experts conclude. But that could change this year.

“SDS is largely driven by environmental conditions,” Mueller said. “While the wet, cold spring does play a role in increased risk; to get foliar symptoms, you need moisture during late vegetative/early reproductive stages for higher levels of disease.”

SDS has been on the rise the last decade. It came to a head in Iowa in 2010, when yield losses in some infected areas reached 40 percent or more. The disease has cost farmers billions of dollars.

Selecting seed varieties resistant to SDS offers the best protection, experts say. Breaking up soil compaction zones and extended crop rotations are also effective control methods.

“This unbiased and scientifically-sound study by researchers demonstrates no correlation between glyphosate use and the incidence or severity of soybean sudden death syndrome,” said Dr. Ed Anderson, Iowa Soybean Association senior director of Supply & Production Services. “Iowa farmers who are faced with the challenges of managing SDS can use this information in considering how to manage their weed and disease problems.”

To learn more about ISA, go to www.iasoybeans.com.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


LPV Seed Treater

The LPV Seed Treater has set a new standard boasting three configurable weighing methods for any-sized operation, a standard 42” ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form