University of Arizona a dot Cooperative Extension

Alfalfa Report
Yuma County, Arizona
February 25, 2002

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

Production Update:
PDF version, 58KB

Hay Preservatives (Part 3): Microbial hay preservatives or inoculants are available in addition to chemical preservatives. Microbial preservatives are not corrosive to equipment, as is the case with most chemical preservatives, and may be naturally occurring and derived from hay. The beneficial bacteria in hay inoculants stabilize high moisture hay and prevent heating, mold growth, and dry weight loss caused by harmful microbes.

Insect Management: Empoasca spp. leafhopper (Detour signpotato leafhopper photo) occasionally infest low desert alfalfa in large enough numbers to cause economic damage. These tiny yellowish-green insects cause a characteristic wedge-shaped yellow area on the outer end of leaflets (Detour signphoto of damage). The leafhoppers inject salivary toxins that cause the yellowing and stunting. When unabated, the yellowing spreads over the entire leaf giving the field a yellowish appearance. Leafhopper populations build in vegetable fields and weeds. Adult leafhoppers then migrate to alfalfa. If damaging infestations are not controlled, the toxin levels in the crown may persist to stunt and yellow subsequent cuttings. The treatment threshold is 5 to 10 leafhoppers per sweep.

Weed Control: Roundup Ready alfalfa is being developed by Monsanto. Tests being conducted in this area indicate that alfalfa with this genetic characteristic has excellent tolerance to Roundup. The varieties have not yet been chosen and the rates and seed cost have not been finalized. Registration is currently projected at 2004.

Market Summary
Off grade
Past 2 Weeks (Feb 12, 2002 - Feb 24, 2002)
Last Year (Feb 12, 2001 - Feb 24, 2001)


10 Year Summary (February 12, to February 24, 1993 - 2002):

Graph of the 10 year summary of alfalfa prices from  February 12 to February 24, 1993 to 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.

The University of Arizona is an equal opportunity, affirmative action institution. The University does not discriminate on the basis of race, color, religion, sex, national origin, age, disability, veteran status, or sexual orientation in its programs and activities.

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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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