Yuma County, Arizona
February 23, 2004
Yuma County Office
IMPORTANT NOTICE: The alfalfa report will be available exclusively on the internet at http//ag.arizona.edu/crops/counties/yuma/alfalfareports/alfalfareports.html It will no longer be mailed directly to you although a hard copy can be printed from this site. The site contains all previous reports back to August 2000 when it was first posted electronically. A new report will appear every other Monday.
Insect Management: Insect management in alfalfa depends on a good monitoring program. Management decisions should be based on suitable sampling methods to estimate insect pests populations. Check fields at least once a week and more often when counts show that a pest population is approaching damaging levels. Correct identification of insect pests and their damage is essential. Several factors need to be considered when sampling insect populations. Time of day can greatly influence the reliability sampling methods. Nocturnal pests hide during the day. Morning dew or strong winds can alter counts of some insects. Sample at several sites in each field quadrant. Choose sampling methods that are reliable for the insect pests being monitored. Avoid field edges for general sampling, but observe field edges for invading insects.
Weed Control: The effectiveness of Eptam is reduced by its high volatility under frequent irrigations. It is still effective, however, in suppressing perennial weeds like Nutsedge and Bermudagrass when multiple applications are made throughout the summer. Applications following the 1st, 3rd, and 5th cuttings are most important.
10 Year Summary (Feb 10 - Feb 23, 1995-2004):
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, firstname.lastname@example.org Extension Agent, Yuma County
Michael Ottman, email@example.com Agronomy Specialist
College of Agriculture, The University of Arizona.
Eric Natwick, firstname.lastname@example.org UCCE Imperial County - Farm Advisor
University of California, Davis, CA.
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