University of California

Horn fly and grub contzeol on beef cattle… testing several new insecticides


W. H. Johnson
E. C. Loomis

Authors Affiliations

Walter H. Johnson is Farm Advisor, Shasta County; Edmond C. Loomis is Extension Parasitologist, University of California, Davis.

Publication Information

Hilgardia 21(10):12-14. DOI:10.3733/ca.v021n10p12. October 1967.

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A 75% reduction in horn fly populations lasted from two to four weeks following trial spray applications of insecticides in June, for two to six weeks following August treatments, and for the remainder of the fly season with most of the September grub control treatments. During the entire trial, most treatments kept horn fly populations below 100 flies per animal for five to six weeks after treatment. Grub control was excellent with all treatments, ranging from 96% to 99% control. Both common and northern grub infestations were effectively reduced. The split dose of Ruelene 8R provided excellent grub control as well as satisfactory horn fly control from August to the end of the fly season. There were no adverse effects observed on any animals treated during this Study.

Johnson W, Loomis E. 1967. Horn fly and grub contzeol on beef cattle… testing several new insecticides. Hilgardia 21(10):12-14. DOI:10.3733/ca.v021n10p12
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