University of Arizona a dot Cooperative Extension

Alfalfa Report
Yuma County, Arizona
August 12, 2002

Yuma County Office
2200 W. 28th Street, Ste. 102
Yuma, AZ 85364
(928) 726-3904
(928) 726-8472 FAX

Production Update:

Cutting strategies for control of lygus movement: Lygus bugs are a serious pest in cotton, but are not thought to damage alfalfa unless grown for seed. Lygus bugs prefer alfalfa over cotton. In studies where alfalfa has been planted between cotton rows, the lygus still prefer alfalfa even though in close proximity to cotton. Cutting strategies thought to minimize movement of lygus from alfalfa to cotton include cutting in alternating strips the width of one or several borders, cutting "away from" the cotton, leaving an uncut strip of alfalfa next to the cotton, or cutting 40-acre fields in alternating sequence so alfalfa with some growth is always available for the lygus to migrate to. (webmaster note: more information on lygus development, cross-commodity control and control in cotton can be found on

Insect Management: Alfalfa looper, Detour signAuiographa californica (Speyer), is a minor pest of low desert alfalfa. Alfalfa loopers are usually held in check by parasitic wasps, parasitic flies, and bacterial, fungal and viral diseases.

Weed Control: The "weeds controlled" section on herbicide labels sometimes includes weeds that are not controlled locally. The weeds listed in this section are often derived from numerous tests conducted in several regions. A weed may be controlled under the conditions in one region and not controlled in other areas. These lists should be used only as a general guideline.

Market Summary
Off grade
Past 2 Weeks (July 30- Aug. 12, 2002)
Last Year (July 30- Aug. 12, 2001)


10 Year Summary (July 30, 1993 - August 12, 2002):

10 year summary July 30, 1993 to August 12, 2002

Full Disclaimers

Issued in furtherance of Cooperative Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, James A. Christenson, Director Cooperative Extension, College of Agriculture and Life Sciences, The University of Arizona.

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Information provided by:
Barry Tickes, Extension Agent, Yuma County
Michael Ottman, Agronomy Specialist
College of Agriculture, The University of Arizona.
Eric Natwick, UCCE Imperial County - Farm Advisor
University of California, Davis, CA.

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College of Agriculture and Life Sciences
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