0221ControllingMarestailsr.cfm Malatya Haber Controlling marestail in Roundup Ready corn
Home News Livestock Crops Markets Hay, Range & Pasture Home & Family Classifieds Resources This Week's Journal
Commerical Hay Equipment For The Farm
Agro-Culture Liquid Fertilizer



Farm Survey


AgriMartin
Journal Getaways


Reader Comment:
by ohio bo

"An excellent essay on fairs that brought back many memories for me. In my part"....Read the story...
Join other discussions.


Controlling marestail in Roundup Ready corn

By David G. Hallauer

Meadowlark Extension District Agent

For years, reliance on postemergence applications of glyphosate to Roundup Ready corn have been both economical and effective. Today, it might be a little riskier to put all of our eggs in the postemergence control basket. For starters, the risk of yield loss from early season weed competition can get pretty high if weather or other factors delay application. Control of problem weeds like marestail or waterhemp are no longer adequate with glyphosate alone, either. And last but certainly not least, resistance management alone is a good enough reason to do something other than apply glyphosate after the crop has emerge.

Our list of problem weeds is growing. One of them, marestail, can be a significant problem when corn follows soybeans. This is of particular concern when marestail is left uncontrolled during the soybean rotation year (usually signifying some level of resistance).

Fortunately, several herbicides can be used ahead of corn planting with excellent results according to K-State Weed Management Specialist Curtis Thompson. His best recommendation option is a fall application of 2,4-D or dicamba with atrazine and/or glyphosate, all of which provide excellent control. The use of sulfonylurea herbicides can be effective as well, (if marestail is not ALS resistant—if so, include a growth regulator herbicide in the tank mix).

Couldn’t spray in the fall? March is the next very important application window. Early spring applications should include a dicamba-based product for the most effective control results (2,4-D at the rate of 1 quart per acre of 4 pounds per gallon product can be effective in spring on small marestail, but a pint of dicamba has been more consistent). Dicamba is a little weak on winter annual mustards requiring a tank-mix with another herbicide for best results. Atrazine continues to have good activity on small rosette-stage marestail—much less on large, bolted plants.

For more information, check out the 2014 KSU Chemical Weed Control Guide available at your District Extension Office.

Date: 3/10/2014



Google
 
Web hpj.com

Copyright 1995-2014.  High Plains Publishers, Inc.  All rights reserved.  Any republishing of these pages, including electronic reproduction of the editorial archives or classified advertising, is strictly prohibited. If you have questions or comments you can reach us at
High Plains Journal 1500 E. Wyatt Earp Blvd., P.O. Box 760, Dodge City, KS 67801 or call 1-800-452-7171. Email: webmaster@hpj.com

 

Archives Search


Advertisement
NCBA Convention

United Sorghum Checkoff Program

Inside Futures

Editorial Archives

Browse Archives