Yuma County, Arizona
July 26, 2004
(PDF version, 106KB)
Insect Management: Several fields have developed injurious levels
of Empoasca (picture)
leafhopper this summer. Adult are about 1/8" long, bright green,
and have wedge-shaped bodies. Nymphs resemble adults but lack wings; both
run rapidly forward, backward, or from side to side when disturbed. At
the first sign of injury, Sample using a standard sweep net. Infestations
often start on field margins, so include them in your sampling. Taking
10 sweeps in 4 to 6 areas over the entire field and count the adults and
nymphs. When an alfalfa field is two or more weeks from harvest, treat
if counts reach 5 leafhoppers per sweep. If alfalfa is to be harvested
in 10 days to 2 weeks, treat if counts reach 10 per sweep. A leafhopper
infestation of treatable magnitude may be confined to the first 50 to
100 feet of the field margin. In this case, treat only the field edges.
Ambush®, Baythroid®, Furadan®, Guthion®, Lannate®,
Lorsban®, Mustang®, and Warrior® are insecticides that may
be used for leafhopper control in alfalfa.
10 Year Summary (July 13, to July 26, 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.
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, 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.
Field Crops | Farm
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
located at: http://cals.arizona.edu/crops/counties/yuma/alfalfareports/2004/afalfarpt072604.html
Copyright © 2001 University of Arizona,
College of Agriculture and Life Sciences
Webmaster: Al Fournier (firstname.lastname@example.org)