Featured Research

from universities, journals, and other organizations

Foliar fungicides may not be the answer for hail-damaged corn

Date:
March 30, 2010
Source:
University of Illinois at Urbana-Champaign
Summary:
Researchers may have debunked the myth that foliar fungicides can improve corn's tolerance to hail damage.

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

Related Articles


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.


Story Source:

The above story is based on materials provided by University of Illinois at Urbana-Champaign. Note: Materials may be edited for content and length.


Cite This Page:

University of Illinois at Urbana-Champaign. "Foliar fungicides may not be the answer for hail-damaged corn." ScienceDaily. ScienceDaily, 30 March 2010. <www.sciencedaily.com/releases/2010/03/100330142431.htm>.
University of Illinois at Urbana-Champaign. (2010, March 30). Foliar fungicides may not be the answer for hail-damaged corn. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2010/03/100330142431.htm
University of Illinois at Urbana-Champaign. "Foliar fungicides may not be the answer for hail-damaged corn." ScienceDaily. www.sciencedaily.com/releases/2010/03/100330142431.htm (accessed October 24, 2014).

Share This



More Plants & Animals News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins