i 
on the animal for sucha short time, 
treatment of the animal with an insecti- 
cide is not so effective as for the con- 
trolofthehorn fly. Sanitation and ap- 
plication of a residual insecticide to 
the premises are important supple- 
mental measures for controlling the 
stable fly. 
Better ways than we now know for 
using methoxychlor and the new pyreth 
rum sprays on animals to reduce stable 
fly attack may be worked out. There- 
fore, the suggestions given here are 
only tentative. 
The suggestions given for treating 
dairy cattle for controlling the horn 
fly may also be used. However, it 
may be necessary to apply sprays twice 
a week. Aboutl1 quart of spray on the 
legs, shoulders, dewlap, belly, and 
lower sides of each animal will repel 
some of the flies for only a day or two, 
but for about 3 days after the treat- 
ment most of the flies feeding on the 
animals willbekilled. This treatment 
will also controlhorn flies, especially 
if the backs of the animals also are 
sprayed lightly. 
Pyrethrum insecticides are the 
most effective ofthe available materi- 
als for protection of dairy cows against 
stable flies. Mix1partof an emulsion 
concentrate containing 1 percent of 
pyrethrins and10 percent of piperonyl 
butoxide with 9 parts of water, and 
apply atthe rate of 1 quart per animal, 
as described for methoxychlor. Most 
of the flies are repelled or killed if 
they attempt to feed during the first 3 
days after treatment. This treatment 
will also control the horn fly. 
