Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

U of I researchers say foliar fungicides may not be the answer for hail-damaged corn

31.03.2010
University of Illinois researchers may have debunked the myth that foliar fungicides can improve corn's tolerance to hail damage.

In 2009, the U.S. Environmental Protection Agency granted a supplemental label registration for use of Headline fungicide on registered crops for disease control and plant health. This label stated that the fungicide can provide a benefit of "better tolerance to hail" in corn.

"When these recommendations began to surface, I was not aware of any data from properly designed research studies to back them up, so we decided to test this theory," said Carl Bradley, U of I Extension plant pathologist.

Researchers simulated hail damage to corn before tassels emerged with a gasoline-powered string mower causing injury to leaves and defoliation. Once the tassels completely emerged, foliar fungicides were applied to corn.

Understandably, yield was significantly reduced in the simulated hail-damaged areas versus non-damaged control areas both years. However, foliar fungicides did not significantly improve yield in either the damaged or non-damaged plots compared with the non-treated controls.

"To make a recommendation to spray a hail-damaged field, one would expect to see a differential reaction where the fungicide improves the damaged corn," Bradley said. "However, we didn't see that in either of the years the trial was conducted. Our research showed there was no difference in yield."

Prior to 2007, application of foliar fungicides to hybrid corn in the Midwest was uncommon. In 2007, estimates of approximately 10 to 14 million acres out of an approximate total of 76 million acres of corn in the Midwest were sprayed with a foliar fungicide.

Bradley said this dramatic increase was brought on by many different factors.

"With corn market prices reaching unprecedented levels in 2007, the yield response needed to pay for a fungicide application was lowered, making this practice more enticing to corn growers," Bradley said. "Agrichemical companies marketed and promoted fungicide applications for yield enhancement due to improved growth efficiency and stress tolerance in addition to disease control."

The possibility of yield enhancement without regard to disease pressure was enough of a reason for some corn growers to use a foliar fungicide on their 2007 corn crop, he added.

"Growers should consider factors other than hail damage when making fungicide application decisions for corn," Bradley said. "You need to consider disease risk and scouting observations."

More research is needed on the effect of foliar fungicides on hail-damaged corn, as it is possible fungicides could affect other variables not measured in this study such as mycotoxin levels in harvested grain and stalk rot, Bradley said.

This study was published in the January 2010 issue of the journal Plant Disease and was supported by the USDA Cooperative State Research, Education, and Extension Service Hatch Act program. Researchers included Carl Bradley and Keith Ames of the U of I.

Jennifer Shike | EurekAlert!
Further information:
http://www.illinois.edu

More articles from Studies and Analyses:

nachricht Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Oxygen loss in the coastal Baltic Sea is “unprecedentedly severe”
05.07.2018 | European Geosciences Union

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

Im Focus: Chemical reactions in the light of ultrashort X-ray pulses from free-electron lasers

Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.

Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

Microscopic trampoline may help create networks of quantum computers

17.07.2018 | Information Technology

In borophene, boundaries are no barrier

17.07.2018 | Materials Sciences

The role of Sodium for the Enhancement of Solar Cells

17.07.2018 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>