Extension Jury Still Out On ‘Other’ Fungicide Use

The jury is still out on the effectiveness and feasibility of using fungicides on corn — in the absence of diseases — to boost yields, and plant pathologists continue to recommend their use in an integrated pest management (IPM) approach to dealing with foliar diseases.

In a study of 100-plus corn plots throughout the eastern Corn Belt, plant pathologists found that yields varied widely between fungicide-treated and untreated corn plots.

"For any given trial, you could have a fungicide-treated plot out-yielding the untreated plot and an untreated plot out-yielding a treated plot," says Pierce Paul, an Ohio State University plant pathologist with the Ohio Agricultural Research and Development Center. "For example, we found that in some cases an untreated plot out-yielded a treated plot by as many as 30 bushels per acre, but yet in other cases the fungicide-treated plot out-yielded the untreated plot by a similar margin. We are not sure when a positive or negative yield response is to be expected."

Paul says researchers across the Corn Belt are trying to determine what could be driving the difference in yield response from one location to the next.

"With such high variability, there’s something going on at the level of individual farms," ;he says. "It could vary with the product. It could vary with the hybrid. It could vary with the weather conditions, or when the fungicide is applied relative to grain fill, and certainly with how much disease is present in the field. Different combinations of these factors may have very similar or vastly different effects on the yield response. It’s not as clear-cut as the word out there seems to suggest."

Some growers have been using fungicides in the absence of diseases to boost yields or improve stalk quality, specifically when the corn crop appears to be stressed.

"The general thinking is that when corn is drought-stressed or stressed from other situations, then fungicides are likely to result in a positive yield response," says Paul. "However, detailed, well-designed, replicated studies are needed to evaluate these claims."

Plant pathologists continue to recommend that growers only use fungicides on the crop when warranted to control for diseases, such as gray leaf spot and northern corn leaf blight.

"What we would tell farmers is that if they choose to use fungicides and make yield comparisons, then apply to multiple strips in the field or conduct full-blown replication trials. A lot of the information out there associating fungicide use with yield enhancement is coming in from strip trials where one strip is treated and one is not," says Paul. "It’s hard to tell what’s going on in the field with just two strips. The natural variation in a field tells us that if you harvest two strips from different locations within the same field, you will likely see differences in response between the strips, whether or not a fungicide is applied. For instance, yield response due to differences in soil properties between two strips may be confused with fungicide performance."

Paul says that not only do growers have to consider the effectiveness of fungicides for the purpose of boosting yields, but they should also consider the economic feasibility of their use, despite the current high corn prices that might be driving growers to squeeze a few more bushels per acre at harvest.

Leave a Reply

Featured Stories
Matt Hopkins5 Bold Predictions For Ag Retail In 2015
January 21, 2015
This past year was filled with ups and downs for the nation’s top ag retailers, but what will 2015 have in store? Read More
FertilizerTFI President To Give Update On Nutrient Management Efforts At Annual Conference
January 19, 2015
The Fertilizer Institute President Chris Jahn will give the keynote address at the 2015 Ohio AgriBusiness Association Industry Conference February 4. Read More
Green Valley Ag facility
Paul SchrimpfRightsizing Ag Retail
January 9, 2015
Seeking the right balance of facilities, efficiency and customer service will make our businesses stronger and, truth be told, more capable of competing effectively with the likes of Pinnacle. Read More
Matt Hopkins10 Best New Agriculture Apps For 2015
December 15, 2014
Has the app market reached a saturation point? Consider Google Play and the iTunes App Store combined have more than Read More
Top 100 Articles
CropLife 100CHS Partners With Northern Partners Coop On Fertilizer Warehouse
January 21, 2015
In addition, the two companies will form a joint venture to build and operate a grain barge loading facility that will handle corn, soybeans and wheat for export through the CHS terminal at Myrtle Grove, LA. Read More
CropLife 100Wilbur-Ellis Move To Colorado Complete
January 20, 2015
Wilbur-Ellis Co. announces the opening of its new Agribusiness Division location in the Denver, CO, Metro Area. The new facility will host key personnel as the company shifts the base of its Agribusiness operations from California to Colorado. Read More
CropLife 100United Suppliers, McGregor Co., Five Others To Form Aligned Ag Distributors
January 20, 2015
These companies will continue to operate as independently owned and operated businesses, however, their crop protection divisions will now be formally aligned under the umbrella of Aligned Ag Distributors. Read More
CropLife 100Bozeman Named SEEDWAY Chief Operating Officer
January 16, 2015
He succeeds Donald Wertman, who will retire at the end of August 2015 after 40 years with the GROWMARK subsidiary. Read More
CropLife 100Wilbur-Ellis’ Craig Bair Honored For Safety Contributions To Ag Aviation
January 14, 2015
The William O. Marsh Safety Award recognizes significant achievements in safety, safety education or an outstanding operational safety program. Read More
CropLife 100BRANDT Gearing Up For Another NASCAR Season
January 13, 2015
BRANDT will return for its fifth year as a primary sponsor of the No. 51 driven by Justin Allgaier in the NASCAR Sprint Cup Series. Read More
Latest News
ManagementRetail Collaboration, Communicating Agriculture’s Good …
January 23, 2015
Editors Paul Schrimpf and Eric Sfliligoj discuss the recent creation of Aligned Ag Distributors, and the US Farmers and Ranchers Read More
FertilizerOSU Expert: Toledo Water Crisis A Turning Point For Ohi…
January 23, 2015
The August 2014 water crisis in Toledo, OH, impacted Ohioans’ views of Lake Erie algae problems by increasing the attribution of blame of algae growth on agriculture. Read More
FertilizerH.J. Baker Launching TIGER XP
January 22, 2015
Tiger-Sul introduces this next generation sulphur-bentonite product with a proprietary activator – ensuring farmers have a well-balanced nutrient replacement program. Read More
Crop InputsH.J. Baker Expands China Sales Force
January 21, 2015
Global Agricultural firm H.J. Baker announced that sales veteran Shi Dongshen has joined their Shanghai office in China. This newest hire follows the recent opening of their Lianyungang Sulphur Bentonite Plant. Read More
CropLife 100CHS Partners With Northern Partners Coop On Fertilizer …
January 21, 2015
In addition, the two companies will form a joint venture to build and operate a grain barge loading facility that will handle corn, soybeans and wheat for export through the CHS terminal at Myrtle Grove, LA. Read More
Matt Hopkins5 Bold Predictions For Ag Retail In 2015
January 21, 2015
This past year was filled with ups and downs for the nation’s top ag retailers, but what will 2015 have in store? Read More
SoftwareDeere Launches App Center
January 20, 2015
The John Deere App Center provides users the ability to search and find apps most useful to their business or operations. Read More
Crop InputsNew Syngenta Herbicide Approved In Soybeans, Sunflowers
January 20, 2015
Syngenta will sell BroadAxe XC herbicide in 2015 for use on soybeans, sunflowers and dry peas Read More
CropLife 100Wilbur-Ellis Move To Colorado Complete
January 20, 2015
Wilbur-Ellis Co. announces the opening of its new Agribusiness Division location in the Denver, CO, Metro Area. The new facility will host key personnel as the company shifts the base of its Agribusiness operations from California to Colorado. Read More
Crop InputsNovozymes Sales Figures Up For 2014
January 20, 2015
Novozymes announces its sales growth in 2014 was in line with expectations as sales grew by 7% compared with 2013. Read More
CropLife 100United Suppliers, McGregor Co., Five Others To Form Ali…
January 20, 2015
These companies will continue to operate as independently owned and operated businesses, however, their crop protection divisions will now be formally aligned under the umbrella of Aligned Ag Distributors. Read More
Eric SfiligojGMO Or DNA? LOL Or WTF?
January 19, 2015
A new survey finds the American public seems generally confused when it comes to any three-letter descriptor for their food. Read More
FertilizerAGROTAIN Wins No-Till Product Of The Year Again
January 19, 2015
This marks the 10th straight year AGROTAIN nitrogen stabilizer has been named the top product in this category; no other product has matched this honor Read More
FertilizerTFI President To Give Update On Nutrient Management Eff…
January 19, 2015
The Fertilizer Institute President Chris Jahn will give the keynote address at the 2015 Ohio AgriBusiness Association Industry Conference February 4. Read More
Seed/BiotechUnderstanding The Role Of Seed Enhancers In Seed Treame…
January 17, 2015
Seed enhancers such as polymer play a key part in helping to improve germination, seed growth or accuracy of planting. Read More
Crop InputsUSDA Signs Off On Dicamba-Tolerant Trait In Cotton, Soy…
January 16, 2015
A registration decision by EPA for BASF's Engenia herbicide is anticipated to follow the dicamba-tolerant trait deregulation milestone. Read More
CropLife 100Bozeman Named SEEDWAY Chief Operating Officer
January 16, 2015
He succeeds Donald Wertman, who will retire at the end of August 2015 after 40 years with the GROWMARK subsidiary. Read More
Crop InputsDan Clinker Joins Monty’s Sales Team
January 16, 2015
Monty's Plant Food Co. has hired Dan Clinker as a Product Consultant and Sales Support Representative for the Central Ohio region. Read More