Finding The Right Fungicide

Retailers have heard this question from growers as often as the Extension experts: “What is the best and cheapest fungicide to use if I get Asian soybean rust in my soybean fields?”

This critical question is the basis for a three-state research project, “Standardized Foliar Fungicide Test For Control Of Asian Soybean Rust.” Some of the key questions the researchers hope to answer include when is the best time to apply soybean rust-labeled fungicides to soybeans? How much product will remain active if it’s applied early? If it’s sprayed after soybean rust arrives, how effective are the fungicide’s curative qualities?

The cooperative effort is led by project leader Melvin Newman, Extension plant pathologist at The University of Tennessee and a member of the National Soybean Rust Committee.

The Southern Soybean Promotion Board directors approached Newman at the National Soybean Rust Symposium last fall with grower check-off funding in hand. But here’s the rub: So far, Asian soybean rust had not reached Tennessee soybean sentinel plots or commercial fields, meaning Newman had the funding but not the appropriate field set-up. (As of presstime, Tennessee has still been unaffected by soybean rust this season, too.)

Newman decided to pull together researchers in points south who were already dealing with the actual disease: James Marois, University of Florida; Bob Kemerait, University of Georgia; and Ed Sikora, Auburn University in Alabama. “To get the ball rolling, I looked for the states with last year’s most reliable rust infestations,” he explains. “We just know they’re going to have rust, and have it early enough to check the efficacy of the fungicides.”

The study — which focuses on optimizing fungicide timing and use — is independent of any bias from fungicide manufacturers. The group agreed on 13 to 14 requirements to ensure data consistency, including using a randomized complete block design when planting the fields and a core of 12 fungicide treatments.

The View From Georgia

Georgia’s Kemerait chose project sites in Attapulgus, Moultrie, and Tifton. The pattern of two 40-foot untreated/2 treated rows are replicated six to seven times. “You really get a good amount of disease, so the untreated rows stand out,” he says. Rust arrived late this season, which Kemerait attributes to the dry weather.

The plots have been sprayed with a variety of triazoles, strobilurins, triazole/strobilurin combinations, and chlorothalonils.

With harvest just around the corner, the results of the disease and yield ratings will be in soon. “This is primarily a timing experiment,” says Kemerait. “When is it too early to spray and when is it too late?”

For more on this project and our Asian soybean rust research series, visit www.rustready.com

Leave a Reply

Latest News
Young Corn Plants
Eric SfiligojLaunching New Seed Traits: Wait on China . . . Or Else!
June 26, 2017
In life, no one likes the waiting game. In agriculture, however, playing the waiting game is very important – especially Read More
Monsanto sign
Crop InputsMonsanto Speaks on Dicamba Issues in Arkansas
June 26, 2017
Monsanto’s Chief Technology Officer, Robb Fraley, issued the following statement following the Arkansas State Plant Board’s proposal to ban dicamba, Read More
Corn Field
Seed/BiotechCorn Insect Bt Technologies Offer Cost-effective, Proac…
June 26, 2017
When farm economics are challenging, farmers look for ways to bolster profit margins, including reducing input costs. Some may think Read More
Crop InputsArkansas Plant Board Votes to Ban Dicamba — Now W…
June 23, 2017
The Arkansas State Plant Board has voted to pass a proposed emergency rule to ban the use of in-crop dicamba, Read More
Engenia soybeans
Crop InputsBASF: ‘Closely Monitoring’ Dicamba Situatio…
June 22, 2017
BASF, whose Engenia herbicide is the target of more than 200 drift complaints in Arkansas, emailed the following statement to Read More
ManagementConsolidation Update
June 22, 2017
Editors Paul Schrimpf and Eric Sfiligoj discuss progress on manufacturer consolidation, and another big move for Midwest cooperative Central Valley Read More
Palmer pigweed seedhead in cotton
Crop InputsThreat of Dicamba Ban Looms in Arkansas
June 22, 2017
The Arkansas State Plant Board has rejected a proposed ban on the use of dicamba herbicide, but a procedural error Read More
Potash Agrium
Crop InputsAgrium-PotashCorp to become Nutrien upon Merger Complet…
June 21, 2017
Potash Corporation of Saskatchewan Inc. and Agrium Inc. have announced today that once the anticipated merger transaction closes, the new Read More
Crop InputsMidwestern BioAg Hosts TerraNu Fertilizer Plant Opening…
June 20, 2017
Last Friday, Midwestern BioAg was joined by over 80 local farmers, media and staff to celebrate the grand opening of Read More
Soybean Field
Industry NewsAligned Ag Distributors Names New President
June 19, 2017
Aligned Ag Distributors LLC announced this morning the appointment of Mary Tolke to the position of President/CEO, effective July 1. Read More
ManagementPlotting Corn, AGCO/Asmark’s Applicator Training Center…
June 15, 2017
Editors Paul Schrimpf and Eric Sfiligoj talk about their recent visits to Columbus, OH, and Bloomington, IL, along with an Read More
Seed/BiotechDow AgroSciences Announces Launch of Enlist Corn for 20…
June 14, 2017
Enlist corn will be commercially available in the U.S. for the 2018 growing season. Dow AgroSciences announced the launch today Read More
ASMARK AGCO Applicator Training Center
EmployeesAsmark, AGCO Open Training Center for Beginning Applica…
June 13, 2017
AGCO Corp. and the Asmark Institute have opened a new Applicator Training Center, created in a collaboration between the two Read More
Power to Do More Contest Winners
HerbicidesDow AgroSciences Announces Three Winners in Power to Do…
June 13, 2017
Thousands of votes have been cast and three farmers have been awarded the power to do more with a $10,000 Read More
Frogeye leaf spot
FungicidesStrobilurin-resistant Frogeye Leaf Spot Threat Looms wi…
June 13, 2017
Heavy spring rainfall throughout the South and Midwest delayed planting and created the perfect environment for diseases like frogeye leaf Read More
PrecisionAg Vision Conference
Precision AgPrecisionAg® Vision Conference: Focused on the Future
June 13, 2017
PrecisionAg® is pleased to announce the return of its PrecisionAg Vision Conference, October 10-12, 2017. Based on overwhelmingly positive response Read More
CHS St. Paul, MN fertilizer terminal
LegislationICGA Praises President Trump’s Remarks on Waterwa…
June 12, 2017
Illinois Corn Growers Association President Justin Durdan, a farmer from Utica, issued the following statement regarding President Donald Trump’s comments Read More
Wheat Growers
UncategorizedWheat Growers Names Tracy Linbo as Senior Vice Presiden…
June 12, 2017
Wheat Growers has hired Tracy Linbo as Senior Vice President of Agronomy. Linbo joins Wheat Growers after having served 10 Read More