Treat Breeding Places 



If you have standing water on your premises that cannot be abolished, 

 treat it with a larvicide as soon as you see any young mosquito wigglers. 

 Kerosene is used most commonly for the purpose. A tablespoonful scat- 

 tered on top of the water in a barrel or cistern will destroy the wigglers in 

 a few hours. The same quantity of an oil solution containing 5 percent of 

 DDT will be effective for a longer time. For unused toilets and fire buckets 

 and for drain traps in basements and areaways, use kerosene, 5-percent 

 DDT, or powdered borax. Kerosene must be applied every week or two, 

 but borax and DDT last longer. Do not apply DDT to water used for 

 drinking or cooking. 



For the treatment of damaged cesspools sprinkle a pint of used motor oil 

 and kerosene (equal parts) or spray a 5-percent DDT solution or emulsion 

 over the surface of the water. If the cesspool cannot be reached easily, 

 introduce the DDT mixture through a toilet every 3 or 4 weeks. 



To prevent mosquitoes from breeding in water that may collect in old 

 automobile tires, dust the tires occasionally with DDT or borax, or spray 

 them with a 5-percent DDT solution or emulsion. 



Stock ornamental pools with goldfish or, better, with top minnows. Do 

 not feed the fish, and keep the vegetation cleared out enough so that the 

 fish will have access to the entire water surface. A light application of a 

 pyrethrum-kerosene larvicide will destroy any wigglers without staining the 

 pool or injuring the plants or fish. Do not use DDT; it might kill the fish. 



CAUTION. — DDT is poisonous to human beings and animals. Store 

 it in plainly labeled containers out of the reach of children and pets. Do 

 not allow DDT to come into prolonged contact with your body, or let 

 it get into drinking water. 



The treatment of sewage-polluted waters is the responsibility of the com- 

 munity. Weekly spraying with No. 2 fuel oil or 5-percent DDT will 

 control mosquito breeding in such places until the pollution can be elimi- 

 nated. The DDT is effective for a longer time and smaller quantities are 

 needed. Cleaning and straightening the banks of polluted streams and 

 lakes also help prevent mosquito breeding. 



The community is responsible for the prevention of mosquito breeding 

 in sewage filter beds and in water standing along streets and alleys and in 

 public buildings and parks. Some counties and cities have mosquito-con- 

 trol units to do work of this kind, and they may also conduct house-to-house 

 inspections to emphasize the importance of mosquito-control measures and 

 the householders' responsibility. Some pest-control operators contract 

 their services for fogging premises infested with adult mosquitoes. 



KILL ADULT MOSQUITOES WITH SPRAYS 



Few mosquitoes will enter your house if you spray the porch and both 

 sides of the screen doors with DDT. Use an oil solution or an emulsion 

 containing 5 percent of DDT. Such preparations are available at grocery, 

 hardware, and drug stores. Follow the directions on the container. 



If you do find mosquitoes indoors, you can kill them with a good house- 

 hold spray. Such sprays usually contain pyrethrum in a highly refined 

 kerosene, and some contain DDT as well. Apply with a flitgun or similar 

 hand sprayer. Aerosol bombs are even more effective. A few seconds' 



