Alfalfa Report Yuma County, Arizona July 15, 2002 Yuma County Office Production Update: Insect Management: Spider mites in alfalfa may be associated with
water stress and infestations may clear up a few days after an irrigation.
Infestations start in the lower plant canopy moving upward and leaves
are covered with webbing. Spider mites insert needle-like mouth parts
into leaves removing plant sap, causing a yellow stippling on leaves.
With severe feeding leaves turn brown, become dry and drop from the plant.
Feeding damage reduces yield, quality and retards regrowth. Spider mite
species in Western Arizona & Southern California include: carmine spider
mite (T. cinnabarinus Boisdival) ( Weed Control: Anyone who has worked with the dinitroaniline herbicides such as pendimethelin (prowl), trifluralin (treflan) or benefin (balan) knows that these yellow herbicides are easy to get on yourself and equipment and hard to clean off. WD-40 works well to clean it off. If you spray it on, the yellow wipes right off. WD-40 contains petroleum distillates and is harmful if ingested, inhaled or if it comes in contact with your eyes or skin. Read and follow the directions on the label.
10 Year Summary (July 2 to July 15, 1993-2002):
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. | ||||||||||||||||
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