Face Fly and Horn Fly Control on Cattle—1962-6412

Investigations were conducted during the fly seasons in 1962, 1963, and 1964 to control the face fly, Musca autumnalis De Geer, and the horn fly, Haematobia irritans (L.), with various insecticides applied under field conditions. Self-treatment devices such as the 3-cable back rubber and dust bags were used mainly; some salt-insecticide mixtures were included. The insecticides included in the fly-control applications were: ronnel, coumaphos, dichlorvos, carbaryl, diazinon, malathion, lindane, methoxychlor, dimethoate, dimetilan, Silikil® (amorphous silica gel 95.5%, ammonium fluosilicate 1.5%, inert ingredients 3.0%), azinphosmethyl, trichlorfon; fenthion; Baygon® (O-isopropoxyphenyl methylcarbamate); Ciodrin® (alpha-methylbenzyl 3-hydroxycrotanate dimethyl phosphate); famphur; Bayer 37344 (4-(methylthio)-3,5-xylyl methylcarbamate); and Imidan® (O, O-dimethyl S-phthalimidomethyl phosphorodithioate). The most effective treatments for face fly reduction were hand-applied dust treatments of azinphosmethyl 50.0% WP, Ciodrin 5.0%, dimetilan 50.0% WP, and dust-bag-applications with azinphosmethyl (10.0 and 2.0%) and Baygon (2.0%). The azinphosmethyl (2.0%) back rubber also was effective. Three-cable back rubber applications provided excellent horn fly control with methoxychlor (2.0%), Imidan (2.0%), malathion (2.0%), dimethoate (2.0%), and fenthion (2.0%). Horn fly control with Baygon (2.0%) and fenthion (2.0%) dust bags also was excellent.