Corn farmers need to scout for Southern rust - KNOE 8 News; KNOE-TV; KNOE.com |

Corn farmers need to scout for Southern rust

Posted: Updated:

WINNSBORO, La. – Corn farmers should be looking for a damaging fungal disease, Southern rust, which has been found recently in Louisiana.

“Some years we see it. Some years we don’t,” said Trey Price, plant pathologist at the LSU AgCenter Macon Ridge Research Station, adding that the disease is not always a problem for Louisiana growers.

Price said a moderate to heavy infestation has been found in a fungicide trial at the LSU AgCenter Dean Lee Research and Extension Center in Alexandria and in commercial fields in southwest and south central Louisiana. Lighter disease levels have been observed in northern Louisiana.

He said the potential yield losses in late-planted corn could be significant enough to be critical with this year’s low prices.

Corn planted in mid- to late April is more susceptible to the disease. “If corn is in the milk to dough stage right now, you should be scouting for it,” he said.

He said variety trials at the Dean Lee Center may help reveal which hybrids have resistance. Fungicides may help reduce the effects – if an infected crop has yet to reach the dent stage – with strobilurin and triazole fungicides having activity. After the dent stage, he said, fungicides likely will not provide an economic benefit.

Fungicide applications, if warranted in late-planted corn, will slow disease development and preserve yield, he said.

The disease infects leaves and interferes with photosynthesis, resulting in reduced yield from decreased kernel development, he said. The disease usually starts on lower leaves and spreads upward.

Unlike common rust disease, the orange spores are usually only found on the tops of leaves, Price said, and common rust spores are more reddish.

“Warm, humid conditions with consistent rainfall are ideal for Southern rust,” Price said.

The start of corn harvest is three to six weeks away, he said.

 

  • Most Popular StoriesMost Popular StoriesMore>>

  • Man snatches purse of 75 year old woman at Glenwood Hospital

    Man snatches purse of 75 year old woman at Glenwood Hospital

    Monday, September 1 2014 10:13 PM EDT2014-09-02 02:13:05 GMT
    WEST MONROE, La. (KNOE 8 News) - A West Monroe man was arrest early Monday morning for snatching the purse of a victim over 65 years old.
    WEST MONROE, La. (KNOE 8 News) - A West Monroe man was arrest early Monday morning for snatching the purse of a victim over 65 years old.
  • Black bear plays hide-and-seek in Winnsboro

    Black bear plays hide-and-seek in Winnsboro

    Sunday, August 31 2014 3:16 PM EDT2014-08-31 19:16:24 GMT
    WINNSBORO, La. (KNOE 8 News) - One KNOE viewer sent in some cute video of what looks to be a Louisiana Black Bear hanging out in a rice field.
    WINNSBORO, La. (KNOE 8 News) - One KNOE viewer sent in some cute video of what looks to be a Louisiana Black Bear hanging out in a rice field.
  • Woman sentenced in silicone injection case

    Woman sentenced in silicone injection case

    Tuesday, September 2 2014 1:57 PM EDT2014-09-02 17:57:05 GMT
    JACKSON, Miss. (AP) - A Mississippi woman convicted of killing a Georgia woman through illicit silicone buttocks injections has been sentenced to life in prison.
    JACKSON, Miss. (AP) - A Mississippi woman convicted of killing a Georgia woman through illicit silicone buttocks injections has been sentenced to life in prison.
  • Union Parish makes two DUI arrests over holiday weekend

    Union Parish makes two DUI arrests over holiday weekend

    Tuesday, September 2 2014 2:42 PM EDT2014-09-02 18:42:33 GMT
    UNION PARISH, La. (KNOE 8 News UPSO) - Union Parish sheriff's deputies made two driving while intoxicated arrests over the Labor Day weekend. James Daniel Autrey, 18, of Cherry Ridge Road, Farmerville, was booked on a total of 11 traffic violations.
    UNION PARISH, La. (KNOE 8 News UPSO) - Union Parish sheriff's deputies made two driving while intoxicated arrests over the Labor Day weekend. James Daniel Autrey, 18, of Cherry Ridge Road, Farmerville, was booked on a total of 11 traffic violations.
  • Man accused of stabbing his nephew

    Man accused of stabbing his nephew

    Monday, September 1 2014 4:10 PM EDT2014-09-01 20:10:07 GMT
    MONROE, La. (KNOE 8 News) - Monroe Police have arrested a Monroe man for stabbing his nephew. Police say the Donald Ray Myles and victim got into an altercation Thursday night around 10:30. Police say Myles stabbed the victim with a steak knife, and then the victim was rushed to the hospital. 
    MONROE, La. (KNOE 8 News) - Monroe Police have arrested a Monroe man for stabbing his nephew. Police say the Donald Ray Myles and victim got into an altercation Thursday night around 10:30. Police say Myles stabbed the victim with a steak knife, and then the victim was rushed to the hospital. 
  • Family: Joan Rivers on life support

    Family: Joan Rivers on life support

    Tuesday, September 2 2014 1:45 PM EDT2014-09-02 17:45:42 GMT
    NEW YORK (AP) - Joan Rivers' family is confirming that the comedian is on life support after going into cardiac arrest last week during a procedure at a doctor's office. Her daughter, Melissa Rivers, said in a statement Tuesday that her mother is on life support "at this time." Melissa said the family is extremely grateful for the public support. Joan Rivers was taken to Mount Sinai Hospital in Manhattan last Thursday. The 81-year-old comic and red carpet commentator has maintained a busy car...
    NEW YORK (AP) - Joan Rivers' family is confirming that the comedian is on life support after going into cardiac arrest last week during a procedure at a doctor's office. Her daughter, Melissa Rivers, said in a statement Tuesday that her mother is on life support "at this time." Melissa said the family is extremely grateful for the public support. Joan Rivers was taken to Mount Sinai Hospital in Manhattan last Thursday. The 81-year-old comic and red carpet commentator has maintained a busy car...
  • Second arrest made in April 2013 murder

    Second arrest made in April 2013 murder

    Saturday, August 30 2014 3:00 PM EDT2014-08-30 19:00:56 GMT
    MONROE, La. (KNOE 8 News) - A second arrest has been made in the April 2013 murder of Steve Brown.
    MONROE, La. (KNOE 8 News) - A second arrest has been made in the April 2013 murder of Steve Brown.
  • Two suspects wanted for armed robbery

    Two suspects wanted for armed robbery

    Monday, September 1 2014 12:07 PM EDT2014-09-01 16:07:03 GMT
    MONROE, La. (KNOE 8 News) - Monroe police are looking for two suspects that robbed a Kangaroo convenient store. Police say two black males entered the store, located at 4320 Desaird Street, around 3:15 Friday morning. They say the suspects robbed the store at gun point and police were able to able to get a photo of one suspect. That suspect is described as a younger black male over six feet and it appears he is wearing a Neville sweatshirt. He is considered armed and dangerous. 
    MONROE, La. (KNOE 8 News) - Monroe police are looking for two suspects that robbed a Kangaroo convenient store. Police say two black males entered the store, located at 4320 Desaird Street, around 3:15 Friday morning. They say the suspects robbed the store at gun point and police were able to able to get a photo of one suspect. That suspect is described as a younger black male over six feet and it appears he is wearing a Neville sweatshirt. He is considered armed and dangerous. 
Powered by WorldNow
All content © Copyright 2000 - 2014 WorldNow and KNOE. All Rights Reserved.
For more information on this site, please read our Privacy Policy and Terms of Service.