University of Arizona a dot Cooperative Extension

Alfalfa Report
Yuma County, Arizona
April 9, 2001

Yuma County Office
2200 W. 28th Street, Ste. 102
Yuma, AZ 85364
(520) 726-3904
(520) 726-8472 FAX

Production Update:
PDF version, 14KB

Hay Preservatives (Part 2): Chemical hay preservatives include organic acids (especially propionic acid), ammonia, and urea. Propionic acid is generally thought to be the most reliable preservative, although other compounds are also effective. Horses do not relish hay treated with propionic acid, although no evidence exists to date that this compound is harmful to them. Ammonia can be used as a preservative and is often applied in an effort to boost feed value of low quality hay. Anhydrous ammonia applied at rates greater than 3% may cause toxic compounds to form and pass into milk. Urea does not have the volatility and safety problems of ammonia and is an effective preservative.

Insect Management: The granulate cutworm, Agrotis subterranea (Fabricius), is a devastating pest of bed planted alfalfa and is also an occasional pest of flood irrigated alfalfa. The cutworm larvae often go undetected until after cutting or hay removal. When fields are watered back, there may be areas with little or no regrowth due to cutworms feeding on new shoots from alfalfa crowns. Granulate cutworm is nocturnal and will move from cracks in the soil or from under duff in the evening and climb into the alfalfa canopy to feed. Some of the cutworms feed on new shoots under the duff, holding back regrowth, depleting starch reserves in the crowns and thereby weaken the plants. Weakened plants are more susceptible to disease. Permethrin, cyfluthrin and endosulfan are insecticides that control this pest. Cutworms feeding under the duff may escape insecticide treatments.

Weed Control: The weed species that predominate in the fields are those that are left behind by our control practices. As herbicide usage changes, the weeds change. For instance, sowthistle has become more widespread as we have changed from 2, 4-DB to Pursuit and malva and shepardspurse have disappeared. Nutsedge and bermudagrass have become more widespread and annual grasses less prevalent due to the change from Eptam to Select and Poast.

Market Summary
Off grade
Past 2 Weeks (Mar. 26 to Apr. 8, 2001)
Last Year (Mar. 26 to Apr. 8, 2000)


10 Year Summary (March 26, to April 9, 1992-2001):

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.

Any products, services, or organizations that are mentioned, shown, or indirectly implied in this web document do not imply endorsement by The University of Arizona.

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.

Material written April 9, 2001.

Yuma County: Field Crops | Farm Notes | Alfalfa Reports | Vegetables

Forages: Crop Mgmt | Soil Mgmt | Irrigation | Alfalfa Reports | Insects | Diseases | Weeds | Pesticides
Home | Other Crops | Forages

For more Arizona Production Ag Information:
Home | Cotton | Veggies| Forages | Grains | Citrus | Crop x Crop | Insects | Diseases| Weeds | Pesticides | News | Weather | Research | Photos | Contacts | General Info. | Site Map

document located at:
Copyright © 2001 University of Arizona,
College of Agriculture and Life Sciences
Webmaster: Al Fournier (