Featured Research

from universities, journals, and other organizations

Over-the-top grass control in sorghum on the horizon

Date:
September 13, 2010
Source:
Texas A&M AgriLife Communications
Summary:
Apply today's chemicals to a sorghum crop for grass control and the sorghum will be killed off also. But a solution could be only a few years away if Texas research plots are any indication. Test plots demonstrate sorghum hybrids tolerant to herbicides typically associated with grass control.

A plot of sorghum that has been treated shows the die-off of the Johnsongrass between the rows of healthy sorghum.
Credit: Texas AgriLife Research photo by Kay Ledbetter

Apply today's chemicals to a sorghum crop for grass control and the sorghum will be killed off also. But a solution could be only a few years away if Texas AgriLife Research plots are any indication.

Dr. Brent Bean, AgriLife Research and Texas AgriLife Extension Service agronomist, has test plots that demonstrate sorghum hybrids tolerant to herbicides typically associated with grass control.

The control is needed not only for annual grass control but also for Johnsongrass, Bean said. Because Johnsongrass is closely related to grain sorghum, herbicides typically used in crops such as cotton and corn cannot be used in sorghum.

A solution might be found with two sorghum hybrids originating from germplasm developed in the Kansas State University sorghum breeding program about five or six years ago. The germplasm development was funded by the National Grain Sorghum Producers Board and the United Sorghum Checkoff Program.

The germplasm is now being developed into commercial hybrids by Pioneer Seed Co. and other seed companies, Bean said. Products labeled for use in these herbicide-tolerant hybrids will come from DuPont.

"There's a group of herbicides called ACCase herbicides," he told a group of producers at a recent field day. "You are familiar with those in herbicides like Fusilade, Poast, Select, Assure II and Fusion. They've been around a number of years and are used primarily for grass control in soybeans and cotton.

"You are also familiar with ALS herbicides typically used in corn, such as Resolve, Accent and Basis," Bean said. "The tolerant hybrids being developed will eventually be tolerant to both classes of herbicides."

What will be labeled for the ACCase-tolerant sorghum is Assure II, he said. There are actually two classes in the ACCase herbicide family, so not all of them will work. Bean has a plot of ACCase-tolerant sorghum that he sprayed with Select and it killed the sorghum.

"One will kill the sorghum, so Assure2 is what you want to use. With the other group of sorghums, they are going to be SU-tolerant for those herbicides.

Jack Lyons of Amarillo, with DuPont, said what the company is looking to do is "supply some post-emerge grass control in sorghum -- something that has been missing for a long time, especially for dryland farmers."

The seed companies are dealing with two traits which are being brought forward in the development phase individually. The ALS trait is going to be called Inzenz and the Assure II trait will be called InzenzAII, and eventually they will be stacked together.

The ALS herbicide will have three active ingredients -- nicosulfuron, familiar to producers in the product Accent; rimsulfuron (Resolve and Steadfast) and metsulfuron, commonly known as Ally, which is now primarily used in wheat, Lyons said.

How these three active ingredients will be mixed together is still being determined, Bean said. His AgriLife Research studies will help determine the final product to be marketed by DuPont.

This year, Bean has two trials out comparing the effectiveness of various combinations of these three active ingredients, along with other herbicides currently labeled for use in sorghum.

He said the results look very promising with good grass control being achieved, although it appears application timing will be important. Other trials are being planned for next year in farmer's fields.

The two classes of herbicides will provide two different modes of action to control grass, Bean said. This will help prevent weed resistance to the herbicides from developing.

The ACCase-tolerant hybrids will be tolerant to those herbicides commonly referred to as "fobs," products like Assure II; and that was done with some forethought, Lyons said.

"That will leave us with the 'dims,' products like Select, where we will have a tool to control volunteer sorghum in a crop rotation program or if we develop some resistance," he said.

The big question is when these traits might be available in seed, Bean said.

Lyons said he expected quantities sufficient for larger demonstrations in 2012 and then for commercial production in 2013.


Story Source:

The above story is based on materials provided by Texas A&M AgriLife Communications. The original article was written by Kay Ledbetter. Note: Materials may be edited for content and length.


Cite This Page:

Texas A&M AgriLife Communications. "Over-the-top grass control in sorghum on the horizon." ScienceDaily. ScienceDaily, 13 September 2010. <www.sciencedaily.com/releases/2010/09/100913100453.htm>.
Texas A&M AgriLife Communications. (2010, September 13). Over-the-top grass control in sorghum on the horizon. ScienceDaily. Retrieved April 21, 2014 from www.sciencedaily.com/releases/2010/09/100913100453.htm
Texas A&M AgriLife Communications. "Over-the-top grass control in sorghum on the horizon." ScienceDaily. www.sciencedaily.com/releases/2010/09/100913100453.htm (accessed April 21, 2014).

Share This



More Earth & Climate News

Monday, April 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ocean Drones Making Waves in Research World

Ocean Drones Making Waves in Research World

AP (Apr. 21, 2014) Two California companies are developing unmanned watercraft to study the ocean. The ocean drones can stay at sea for months to gather scientific data, patrol borders and protect endangered reefs. (April 21) Video provided by AP
Powered by NewsLook.com
Drought Concerns May Hurt Lake Tourism

Drought Concerns May Hurt Lake Tourism

AP (Apr. 18, 2014) Operators of recreational businesses on western reservoirs worry that ongoing drought concerns will keep boaters and other visitors from flocking to the popular summer attractions. (April 18) Video provided by AP
Powered by NewsLook.com
Man Claims He Found Loch Ness Monster With... Apple Maps?

Man Claims He Found Loch Ness Monster With... Apple Maps?

Newsy (Apr. 18, 2014) Andy Dixon showed the Daily Mail a screenshot of what he believes to be the mythical beast swimming just below the lake's surface. Video provided by Newsy
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. 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:
from the past week

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