fn a 
This amount of bait paste will be sufficient for about 150 stations, 
at a cost of approximately $5, including the plastic-impregnated screen, 
which costs about $2. The quantities of ingredients may be proportion- 
ately reduced if fewer bait stations are desired. Cheaper screen may 
be used if the stations are not exposed to rain. 
The tongue depressors may be sharpened on the free end and pushed 
into the ground at the edge of manure piles, or hung from the cages to 
a point as near the ground as possible. They may also be tacked to 
cage supports below and out of reach of the poultry. At least one bait 
station per 10 feet should be used, and more in places where the flies 
are congregating. (See photograph on opposite page.) 
Cloth strips, 2 or 3 inches wide and about 30 inches long, treated 
with the bait paste may also be used as bait stations. These strips, 
tacked in place, may be useful in localities where flies gather high 
in a building rather than on and near the floor. As far as is known, 
they are not commercially available but may be made of a cheap grade 
of cotton or burlap. 
Surface and Space Sprays 
Surface sprays leave a residue that may be effective for several 
weeks. DDT, methoxychlor, chlordane, toxaphene, lindane, malathion, 
and Diazinon are recommended for such use in poultry houses. Apply 
the spray at the rate of 1 or 2 gallons to 1,000 square feet. Wet the 
surface without causing runoff. Use a power, compressed-air, or 
knapsack sprayer, depending on the size of the building. 
Space sprays do not leave a satisfactory residue, but when dis- 
charged into the air will destroy flies present in the building. A hana 
or power sprayer or fogger or an aerosol bomb may be used. A fogger uses 
the material most economically. Pyrethrum sprays containing piperonyl 
butoxide, propyl isome, or sesame oil are effective against all flies. 
Some of these sprays also contain DDT, methoxychlor, or lindane. Space 
sprays are most effective in poultry houses that can be closed rather 
tightly. 
In some localities house flies are resistant to DDT, chlordane, 
methoxychlor, lindane, and toxaphene. 
Fly Cords 
In many places cords impregnated with insecticides have been found 
effective when hung vertically or in loops from the ceiling of the 
poultry building. Flies resting on these cords are killed because of 
the residual effect of the insecticide. Residual control lasts from 
Lk to 6 weeks. 
