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
Southern States Cooperative
Corn Field
Industry NewsTiger-Sul Names Veteran Account Manager To Lead Central…
May 23, 2016
With the continuing growth of the sulphur bentonite and precision crop nutrient industry, global agriculture firm H.J. Baker has announced that Read More
Bayer sign
Industry NewsReuters: Bayer Defies Critics With $62 Billion Monsanto…
May 23, 2016
German drugs and crop chemicals group Bayer has offered to buy U.S. seeds company Monsanto for $62 billion in cash, Read More
Eric SfiligojPity The Monsanto Haters
May 23, 2016
An old saying goes thus: “Be careful what you wish for. You just might get it.” Given current events, there Read More
Industry NewsCompass Minerals Hires Industry Veteran To Lead Plant N…
May 19, 2016
Compass Minerals has hired plant nutrition industry veteran Vatren Jurin to steer the company’s portfolio expansion into specialty liquid micronutrient Read More
ASMARK Retailers LIVE! Tour 2016 Group shot The Andersons
CropLife 100The Andersons Rejects Unsolicited Proposal From HC2
May 19, 2016
The Andersons, Inc. has announced that its Board of Directors has rejected two non-binding, highly conditional, unsolicited proposals from HC2 Read More
glyphosate
Crop InputsWHO: Glyphosate ‘Unlikely’ To Cause Cancer
May 16, 2016
Via Reuters.com reporter Kate Kelland: The weed-killing pesticide glyphosate, made by Monsanto and widely used in agriculture and by gardeners, Read More
dicamba, Roundup Ready 2 Xtend
Crop InputsASA: No Dicamba On Roundup Ready 2 Xtend In 2016
May 16, 2016
While Roundup Ready 2 Xtend (RR2X) are tolerant to dicamba and glyphosate herbicides, no dicamba herbicides will be approved for Read More
CPP, glyphosate, dicamba, atrazine,
Crop InputsReport: Congress Pressing EPA On Glyphosate Review Hand…
May 16, 2016
Via Reuters.com reporter P.J. Huffstutter: U.S. lawmakers have asked EPA to explain why it published – and then withdrew – Read More
Monsanto Luling Plant
Crop InputsReport: Bayer Eyeing Monsanto For Possible Mega-Merger
May 16, 2016
Bayer AG is exploring a potential bid for U.S. competitor Monsanto Co. in a deal that would create the world’s Read More
ManagementAsmark Institute Tour Observations
May 12, 2016
Special Guest CropLife Field Editor Matthew Grassi discusses his week-long visit with 45 ag retailers as part of the Asmark Read More
MicronutrientsCompass Minerals Expands Trial Work For Wolf Trax Innov…
May 12, 2016
Fertilizer manufacturer Compass Minerals continues to expand the evaluation program for its Wolf Trax micronutrient fertilizer products, according to a Read More
Young Corn Closeup
Industry NewsArysta Adds To Marketing Team
May 12, 2016
Arysta LifeScience North America recently announced the addition of David Davies to its marketing team. As marketing manager, Davies will Read More
Photo credit: The United Soybean Board/The Soybean Checkoff.
Crop InputsSyngenta Launches New Biological Seed Treatment
May 12, 2016
Syngenta has announced the launch of the EPIVIO brand family, a range of new biostimulants which address abiotic stresses through seed Read More
Crop Inputs2013 West Texas Tragedy Ruled A ‘Criminal ActR…
May 11, 2016
A 2013 fertilizer plant blast in West, TX, that killed 15 people and injured 160 others was caused by a Read More
Crop InputsLariat Partners Invests In Willowood USA
May 11, 2016
Lariat Partners, a Denver-based private equity firm, has made a significant investment in Willowood USA, a leading manufacturer of generic Read More
Anhydrous Ammonia tanks
LegislationARA: OSHA Announces PSM Formal Rulemaking Intentions
May 11, 2016
In separate communications earlier this week, the Occupational Safety and Health Administration (OSHA) announced plans to conduct formal rulemaking to Read More
The Andersons Fostoria
StewardshipThe Andersons Facilities In Fostoria And Gibsonburg, OH…
May 11, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s facilities in Fostoria and Gibsonburg, OH, have been added to its Read More