UACES Facebook Rescheduled alfalfa field days to address use of cover crops to fight pigweed in September
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Rescheduled alfalfa field days to address use of cover crops to fight pigweed in September

By Ryan McGeeney
U of A System Division of Agriculture
Aug. 27, 2019 

Fast Facts:

  • Use of alfalfa to control pigweed may be effective alternative to herbicides
  • Sept. 9 at Pocahontas; Sept. 20 at Cherry Valley
  • No cost to attend
  • Both field days scheduled to begin at 5:30 p.m.
  • Call 501-671-2171 to register 

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POCAHONTAS, Ark. – Two upcoming field days will address the use of alfalfa as a cover crop and as an effective weapon in the ongoing war against Palmer amaranth, commonly known as pigweed.

Alfalfa field

On Sept. 9, agronomists and researchers with the University of Arkansas System Division of Agriculture will present the first of the two events at the James Farm, located at 4511 AR-304, east of Pocahontas. The second event, rescheduled from an earlier date this summer, will be held Sept. 20 at Washington Springs Ag, located at 175A County Road 324, near Cherry Valley.

Both field days are scheduled to begin at 5:30 p.m., will last about two and a half hours, and will include dinner.

Herbicide-resistant pigweed can be a costly problem for farmers. Historically, crop rotation with a forage crop was used to break up disease and weed cycles. As the weed becomes increasingly unphased by available chemistries, some growers may find that reuniting with an older approach may be the new tool they’ve been seeking.

John Jennings, extension forage specialist for the Division of Agriculture and the primary investigator for this research, said the use of alfalfa as a high quality hay crop is being tested for efficacy in the escalating war against pigweed.

“There is no pigweed that can stand up to being mowed every 30 days, when alfalfa hay is harvested,” Jennings said.

The two upcoming field days will give Arkansas growers the opportunity to learn about whether this approach may be a good fit for their respective farms.

Discussion topics include pigweed biology and control, economics and alfalfa planting and management. All interested crop and livestock producers are encouraged to attend one or both field days.

To register and help with meal planning, please call Linda McCargo at 501-671-2171. There is no cost to attend.

To learn about weed control in Arkansas, contact your local Cooperative Extension Service agent or visit Follow us on Twitter at @UAEX_edu.


 About the Division of Agriculture

The University of Arkansas System Division of Agriculture’s mission is to strengthen agriculture, communities, and families by connecting trusted research to the adoption of best practices. Through the Agricultural Experiment Station and the Cooperative Extension Service, the Division of Agriculture conducts research and extension work within the nation’s historic land grant education system.  

The Division of Agriculture is one of 20 entities within the University of Arkansas System. It has offices in all 75 counties in Arkansas and faculty on five system campuses.   

The University of Arkansas System Division of Agriculture offers all its Extension and Research programs to all eligible persons without regard to race, color, sex, gender identity, sexual orientation, national origin, religion, age, disability, marital or veteran status, genetic information, or any other legally protected status, and is an Affirmative Action/Equal Opportunity Employer.

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Media Contact: Ryan McGeeney
Communication Services
U of A System Division of Agriculture
Cooperative Extension Service
(501) 671-2120