Show FARM HEEL FLIES ARE CAUSE OF LOSSES most important insect problem for cattle owners prepared by tho the united states department of 0 agriculture control ot of cattle grubs or heel flies Is one of the most important insect problems with which owners of cattle of all classes have to deal say the authors of a bulletin issued by the united states department of agriculture the cattle grubs or as they i are otherwise known warbles or wolves cause losses estimated at from to annually the bulletin tracee the ufa life history and habits of the insect and explains methods of control the adult orm of the insect the heel fly Is rarely seen although its ita presence ter terrifies rIfles cattle and causes them to make frantic efforts to escape why this Is so Is not clear for the insect has no mouth for biting and it taya lays its eggs on the hair of the animal without causing pain two varieties are known the common cattle grub and the northern cattle grub the common grub Is found over roost most of the united states antes the northern grub Is the more persistent tin and annoying tn in its attacks on cattle and is 14 found only rarely in the southern states where infestations commonly tile dlo out Avit without hout treatment it is most prevalent in the northeastern states the cover page of farmers banners Fan ners bulletin 1590 1506 F P Is something of a departure from arom the usual futeral federal publications five small drawings caricature the efforts of a cow to escape from a buzzing pel heel fly the injury to the cattle comes through their frantic running caused by the hies files and through the parasitic action of the grubs which result in less healthy and thrifty condition of the cattle ind in lessened milk or beet beef production serious injury to the value of the hides Is also caused from the holes cut by the grubs the bulletin gives information as to methods of control extraction of the grubs by hand or with forceps or killing them by applying insecticides it has been found that fairly satisfactory local control is possible the flies apparently patently ly do not migrate great distances the authors however believe that because of the serious damage the insects do it may eventually become necessary to carry on a system of general eradication either nationwide or over large areas until such a campaign develops they advise each owner to control the insects affecting his own animals farmers bulletin 1596 F cattle grubs chubs or heel files with suggestions for thedr the dr control by F C Bis bishopp bopp E W lanke and R W wells of the bureau of entomology has hag just been published for free distribution A copy may be obtained by writing to the united states department of AgrI agrical cul ture washington D C |