Jointed Goatgrass: Best Management Practices Central Great Plains | Extension Publications | Washington State University Skip to main content Skip to navigation

Jointed Goatgrass: Best Management Practices Central Great Plains

Jointed Goatgrass: Best Management Practices Central Great Plains

Download PDF
Doug Schmale, National Jointed Goatgrass Research Program, Washington State University, Lodgepole, NE, Randy Anderson, USDA-ARS, Brookings, SD, Drew Lyon, University of Nebraska, Scottsbluff, NE, Bob Klein, University of Nebraska, North Platte, NE
Jointed goatgrass is a weed that competes with wheat, resulting in reduced yield and increased grain dockage. Managing jointed goatgrass in winter wheat requires a systems approach that integrates multiple control tactics, described in this bulletin. Control tactics include prevention of seed entry into fields, use of herbicides, seed bank management, improved planting techniques, and crop rotations. Integration of multiple control tactics is the key to effective management of jointed goatgrass. The practices described in this bulletin are intended for dryland wheat producers in the western part of the Central Great Plains. This includes producers in areas of western Kansas, eastern Colorado, western and Southern Nebraska, and southeastern Wyoming.
Section 3 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Mauris sit amet pulvinar massa, vel suscipit turpis. Vestibulum sollicitudin felis sit amet mi luctus, sed malesuada nibh ultricies. Nam sit amet accumsan dui, vitae placerat tortor. Vestibulum facilisis fermentum dignissim. Maecenas ultrices cursus diam, eu volutpat urna viverra non.




Jointed goatgrass (Aegilops cylindrica Host) is an invasive weed that causes serious problems in winter wheat in the western United States. Jointed goatgrass reduces wheat yield by competing with wheat for sunlight, soil moisture, and soil nutrients. It is an especially good competitor under conditions of stress such as drought. Research has shown that wheat infested with as few as 18 jointed goatgrass plants per square yard can suffer a yield reduction of nearly 30%. If not controlled, jointed goatgrass will eventually choke out wheat, reducing wheat yields to zero in parts of the field.

In addition to yield losses, wheat contaminated with jointed goatgrass will be discounted for dockage when it is delivered to an elevator. Typical discounts are 4¢/bushel at 1% dockage, 11¢/bushel at 2% dockage, and 18¢/bushel at 3% dockage.

This bulletin will help wheat producers avoid such economic losses by providing information on Best Management Practices for the control of jointed goatgrass in winter wheat. The practices described in this bulletin are intended for dryland wheat producers in the western part of the Central Great Plains. This includes producers in areas of western Kansas, eastern Colorado, western and southwestern Nebraska, and southeastern Wyoming, where the predominant dryland cropping systems are winter wheat–fallow, or winter wheat–spring planted crop–fallow.

Introduction to a Multi-Practice Approach for Jointed Goatgrass Management

Producers have many control practices to choose from when managing jointed goatgrass. However, seldom will a single practice provide acceptable control, especially over a number of years. Effectiveness varies because of such things as drastic differences in weather and differing rates of jointed goatgrass emergence between years. To successfully control jointed goatgrass and other problem weeds, producers should use a multi-practice approach in which a producer combines a number of management practices to achieve better weed control than could be obtained by relying on only one or two practices.

A checklist of possible practices is provided below to show producers numerous options that are available for the control of jointed goatgrass. Often, these same practices can also be used to control other grass weeds such as downy brome and volunteer rye. Since many management practices are most appropriate at a specific time during the year, this bulletin discusses them in a timeline arrangement. This timeline begins at wheat harvest, the point at which many producers first notice a jointed goatgrass infestation, and progresses through the cropping cycle. Producers should review the entire sequence, however, as successful use of a given practice may depend on the use of other practices earlier or later in the cropping cycle.


EXAMPLE: A producer delivers a 1000 bushel load of wheat that contains 3% dockage from jointed goatgrass. If grain from a field contains 3% jointed goatgrass, it is reasonable to assume that the field suffered a 15% yield loss as a result of the jointed goatgrass infestation. At a wheat price of $6.00 per bushel, with the dockage discounts listed above, this producer lost $180.00 from dockage discounts (1000bu x $0.18/bu) and $900.00 from lost production (1000bu x 15% yield loss x $6.00/bu). Jointed goatgrass cost this producer over $1000.00 on just one truckload. If the producer harvested 20,000 bushels of similar wheat, total losses would be over $21,000. At higher wheat prices the losses will be even greater.



Copyright 2016 Washington State University

Use pesticides with care. Apply them only to plants, animals, or sites as listed on the label. When mixing and applying pesticides, follow all label precautions to protect yourself and others around you. It is a violation of the law to disregard label directions. If pesticides are spilled on skin or clothing, remove clothing and wash skin thoroughly. Store pesticides in their original containers and keep them out of the reach of children, pets, and livestock.

WSU Extension bulletins contain material written and produced for public distribution. Alternate formats of our educational materials are available upon request for persons with disabilities. Please contact Washington State University Extension for more information

Issued by Washington State University Extension and the U.S. Department of Agriculture in furtherance of the Acts of May 8 and June 30, 1914. Extension programs and policies are consistent with federal and state laws and regulations on nondiscrimination regarding race, sex, religion, age, color, creed, and national or ethnic origin; physical, mental, or sensory disability; marital status or sexual orientation; and status as a Vietnam-era or disabled veteran. Evidence of noncompliance may be reported through your local WSU Extension office. Trade names have been used to simplify information; no endorsement is intended.