University of Arizona a dot Cooperative Extension


Alfalfa Report
Yuma County, Arizona
March 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, 59KB

Phosphorus fertilizer: In a 3-year study conducted at Maricopa (PDF file, 26KB), surface-applied 11-52-0 and water-run 10-34-0 were equally effective in increasing alfalfa yield. The fertilizer was applied annually in December. These results demonstrate that the alfalfa plant is capable of utilizing P from surface-applied fertilizer that is not mechanically incorporated. Most of the P fertilizer remained in the surface 3 inches of soil whether or not it was surface-applied or water-run.

Insect Management: [note - all picture links below will take you to other sitesDetour sign, hit your "back" button to return to this page] The blue alfalfa, pea aphid (PDF file, 85 KB) (picture, blue aphid) (picture, pea aphid) and cowpea aphid (picture) populations are being kept in check by predators and parasites in alfalfa fields this spring. Lady beetles observed feeding on aphids include seven spotted lady beetle, Coccinella septempunctata, (picture) the convergent lady beetle, Hippodamia convergens (adult picture) (larvae picture),and the ash gray lady beetle, Olla v-nigrum (picture). Green lacewing larvae (picture) have also been feeding on aphid species in alfalfa. Parasitic wasps attaching aphids in alfalfa include Lysiphlebus sp. (picture) and Diaraetiella sp. Beneficial insects play an important role in alfalfa insect management and should be protected. Only treat pest species with an insecticide when they reach the treatment threshold and use insecticides that are least harmful to beneficial insects.

Weed Control: An alfalfa weed control field day is scheduled for Yuma and Erhenberg on Wednesday, April 3. It will be on Avenue 6 1/4 E and 32nd Street from 9:00 - 11:00 a.m. and in Ehrenberg from 2:00 - 4:00 p.m. across from the Rovey Equipment yard on Tsosie Road. Call the Extension office for details.

Market Summary
High
Low
Average
Off grade
Past 2 Weeks ( Mar 12 - Mar 25, 2002)
125
105
120
90-105
Last Year (Mar 12 - Mar 25, 2001)
125
115
120
90-110

 

10 Year Summary (March 12 - March 25, 1993-2002):


10 year market summary 1993-2002


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.

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, btickes@ag.arizona.edu Extension Agent, Yuma County
Michael Ottman, mottman@ag.arizona.edu Agronomy Specialist
College of Agriculture, The University of Arizona.
Eric Natwick, etnatwick@ucdavis.edu UCCE Imperial County - Farm Advisor
University of California, Davis, CA.


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: http://cals.arizona.edu/crops/counties/yuma/alfalfareports/afalfarpt032502..html
Copyright © 2001 University of Arizona,
College of Agriculture and Life Sciences
Webmaster: Al Fournier (fournier@ag.arizona.edu)