Chlordane is available as a 2-percent solution in oil, which should 

 be used as purchased. Emulsion concentrates containing 50 percent 

 of this chemical are also on the market. Make a 2-percent spray by 

 mixing 1 pint of this concentrate with 3 gallons of water. 



Lindane is being sold as a 25-percent wettable powder and as an 

 emulsion concentrate containing 20 to 25 percent of the insecticide. 

 The finished spray should contain 0.3 to 0.5 percent of lindane. The 

 approximate dilutions are given in the accompanying table. 



Dilutions jor lindane sprays 





For 0.3-percent 

 lindane spray 



For 0.5-percent 

 lindane spray 



Lindane formulation 



Formula- 

 tion 



Gallons 



of 

 water 



Formula- 

 tion 



Gallons 



of 

 water 



2.5-percent wettable powder 



20-percent emulsion concentrate. 

 25-percent emulsion concentrate. 



10 pounds. _ 



Yi pound 



1 gallon 



1 pint 



1 gallon 



1 pint 



100 



6o}£ 



8% 

 82/ 3 



ioh 



16 pounds. _ 



/2 pound 



1 gallon 



1 pint 



1 gallon 



1 pint 



100 



3V 8 

 39 



4% 

 49 

 6/ 8 



Imide the house. — If a house is well screened and residual insecti- 

 cides are used outside where flies concentrate, residual treatments in- 

 side the house are usually not necessary. The flies that do enter may 

 best be killed with space sprays or aerosols. 



DDT and methoxychlor are the only residual insecticides now rec- 

 ommended for fly control within the house. A 5-percent solution 

 of either material in refined kerosene is most suitable. You can apply 

 it with an ordinary household sprayer or paint brush. Use enough 

 to moisten the surface thoroughly, but not so much that the spray runs 

 off. On most surfaces 1 quart of solution will cover about 250 square 

 feet. Treat the flies' favorite resting places, such as screens, hanging- 

 light fixtures and drop cords, edges of arches, beams, door and window 

 frames, and other projections or uneven places on the ceiling and 

 walls. It is not usually necessary to treat the entire walls and ceiling. 



In Dairy Barns and Milk Rooms 



Residual sprays applied in dairy barns and milk rooms protect the 

 livestock from annoyance by flies, help protect dairy products from 

 insects and the germs they carry, and indirectly reduce the number of 

 flies in the house and in other buildings. 



Lindane and methoxychlor sprays are recommended for use inside 

 dairy barns and milk rooms. You should apply them at the strengths 

 recommended for treating around the home. DDT and chlordane are 

 not recommended for such use. For treating barns, power sprayers 

 are most satisfactory; compressed air or knapsack sprayers may be 

 used. 



6 



