Yuma County, Arizona
March 24, 2003
Yuma County Office
Insect Management: Egrets, Ibis, gulls, and redwing black birds are commonly seen in alfalfa fields. Birds are important predators of various insect pests in alfalfa including the very damaging granulate cutworm. Egrets, Ibis and gulls are often seen at the leading edge of irrigation water eating crickets and worms forced to move or drown. These birds feed during the day and roost at night. Therefore, they only eat the cutworms in lands where water is run during daylight hours. Black birds eat cutworms, other worm pests, and aphids on alfalfa stems.
Weed Control: Once day time temperatures reach 70oF, it is difficult to safely use the contact herbicides-Gramoxone and Buctril. These herbicides are more active when sunshine is bright and temperatures are warm. The best fit for these herbicides is during the winter when weeds are small and the crop has little foliage.
10 Year Summary (March 11, to March 24, 1994-2003):
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, email@example.com Extension Agent, Yuma County
Michael Ottman, firstname.lastname@example.org Agronomy Specialist
College of Agriculture, The University of Arizona.
Eric Natwick, email@example.com UCCE Imperial County - Farm Advisor
University of California, Davis, CA.
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