Show I DDT Spray Effective Effective I Against Horn Flies I t Horn Horn flies fIles have begun to appear In I large numbers and to annoy cattle by I I sucking suc ng th Ir blood and preventing them themI I from making normal gains In weight I I D- D D G G. P. P 1 Knowlton Utah State Agri- Agri I cultural College C ll gc Extension Entomologist t I warned today I These annoying fly pests can be con con- coni cont controlled con conI controlled i t I I trolled safely and cheaply however by DDT as a spray s ray he said Ji rd 1 I I Gains or exceeding yx pound pou d per head dally daily have commonly occurred d lin In treated animals above that of ot un un- unI un- un untreated I I treated animals on similar feed Dr Ir i Knowlton reported Calves make even greater gains as ae their mothers produce prod ce i imore more mor mill for foi them h m. m M i I DDT is b safe to to use and It controls controls' controls blowflies ad a d i most mOat ticks ns as well as horn flies files th entomologist said t I i. i L Li i i i i r Most farmers who use DDT for con con- controlling controlling trolling lice Ilce and horn flies fUes are using con 1 It I even more generally this year for fly and control he reported Making 50 pounds of extra meat through the application app of ot 10 cents worth of DDT per animal is Just good business he concluded |