Nine insecticides were tested as residual sprays, four as animal sprays and two as area sprays for control of Stomoxys calcitrans (L.). Of the residual sprays, only Shell SD-8447 (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate) as 75% wettable powder (wp); Mobam® (benzo[ b ]thien-4-yl methylcarbamate) as 80% wp; and propoxur as 17% emulsifiable concentrate (EC) applied at a rate of 1.3 oz/1000 ft2 reduced infestations 50% or for 2 weeks or longer. Of the animal sprays, 0.5% dilutions of ronnel as 25% EC (¼ gal/cow), crotoxyphos 67 as 46.7% EC (½ gal/cow), and methoxychlor 50 wp (¼ gal/cow) reduced stable flies 75% or more at 1 day post-treatment, but only crotoxyphos and methoxychlor reduced populations 50% or more at 4 days posttreatment; however, after 7 days the number of flies on all treated animals was equal to or greater than the number on the untreated control herd. The 2 area sprays (dichlorvos as 44.5% EC or 0.2 lb/acre and naled as 58% EC or 0.19 lb/acre) applied with a truck-mounted mist blower reduced populations of stable flies an average of 62 and 67%, respectively, at 1 day posttreatment. The same doses applied with a backpack mist blower gave similar results.