Determining the Economic Damaging Level of the Egyptian Alfalfa Weevil Hypera brunneipennis (Bohemian)

Persistent Link:
http://hdl.handle.net/10150/200480
Title:
Determining the Economic Damaging Level of the Egyptian Alfalfa Weevil Hypera brunneipennis (Bohemian)
Author:
Cotty, Susanne
Issue Date:
Sep-1986
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Forage and Grain: A College of Agriculture Report
Abstract:
An experiment was conducted to ascertain the population level of Egyptian alfalfa weevil Hvpera brunneipennis (EAW) at which chemical control becomes economically justified. Four treatments were established by applying malathion at 1 lb. a.i./acre when an average of 5,10,15, or 20 weevil larvae were found per five sweeps; one treatment was sprayed every week (0 larvae) and the controls received no chemical treatment. Five 180- degree sweeps were taken weekly in each plot with a standard 15 -inch net and net contents were emptied into a white plate for counting. EAW larvae and adults were counted and insecticide was applied when the larval number reached the designated level. Hay from each plot was cut twice manually, air dried and weighed. Significant yield differences (P =0.05) occurred between the 0 larvae treatment and the other treatments for the first cutting but no yield differences occurred for the second cutting.
Keywords:
Agriculture -- Arizona; Grain -- Arizona; Forage plants -- Arizona; Alfalfa -- Arizona; Alfalfa -- Pests
Series/Report no.:
370067; Series P-67

Full metadata record

DC FieldValue Language
dc.titleDetermining the Economic Damaging Level of the Egyptian Alfalfa Weevil Hypera brunneipennis (Bohemian)en_US
dc.contributor.authorCotty, Susanneen_US
dc.date.issued1986-09-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalForage and Grain: A College of Agriculture Reporten_US
dc.description.abstractAn experiment was conducted to ascertain the population level of Egyptian alfalfa weevil Hvpera brunneipennis (EAW) at which chemical control becomes economically justified. Four treatments were established by applying malathion at 1 lb. a.i./acre when an average of 5,10,15, or 20 weevil larvae were found per five sweeps; one treatment was sprayed every week (0 larvae) and the controls received no chemical treatment. Five 180- degree sweeps were taken weekly in each plot with a standard 15 -inch net and net contents were emptied into a white plate for counting. EAW larvae and adults were counted and insecticide was applied when the larval number reached the designated level. Hay from each plot was cut twice manually, air dried and weighed. Significant yield differences (P =0.05) occurred between the 0 larvae treatment and the other treatments for the first cutting but no yield differences occurred for the second cutting.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectGrain -- Arizonaen_US
dc.subjectForage plants -- Arizonaen_US
dc.subjectAlfalfa -- Arizonaen_US
dc.subjectAlfalfa -- Pestsen_US
dc.identifier.urihttp://hdl.handle.net/10150/200480-
dc.relation.ispartofseries370067en_US
dc.relation.ispartofseriesSeries P-67en_US
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