Pupa. 



Adult. 



Insecticide Sprays for Mosquito Control 



SPRAY 



EMULSION 

 0.5-percent — 

 Gamma 

 isomer 

 of BHC 

 (lindane). 

 Heptachlor 



Dieldrin 



1-percent — 

 DDT 



Chlordane. 

 Toxaphene 

 TDE 



Methoxy- 



chlor. 

 Lindane.. 



Heptachlor 



2-percent — 

 Chlordane-. 



5-percent — 

 DDT 



SUSPENSION 

 I -percent — 

 Lindane 



2.5-percent — 

 DDT.. 



Chlordane 



PURPOSE 



TO KILL 

 LARVAE 



TO KILL ADULTS 



Space 

 Spray 



Residual 

 Spray 



PREPARATION 



Mix I part of 20- 

 percent emulsifi- 

 able concentrate 

 with 39 parts of 

 water.* 



Mix I part of 25- 

 percent emulsifi- 

 able concentrate 

 with 24 parts of 

 water.* 



Mix I part of 25- 

 percent emulsifi- 

 able concentrate 

 with 12 parts of 

 water.* 



Mix I part of 25- 

 percent emulsifi- 

 able concentrate 

 with 4 parts of 

 water.* 



Mix I pound of 25- 

 percent wettable 

 powder with 2'/2 

 gallons of water. 



Mix I pound of 50- 

 percent wettable. 

 powder with 2'/2 

 gallons of water. 



*To prepare an oil solution substitute fuel oil. diesel oil, or kerosene for 

 water. Some oil solutions are available ready for use from insecticide 

 dealers. 



Note: If you use a product containing a lower or higher percentage of 

 insecticide, use proportionately more or less of it. 



Outdoors 



Residual sprays. — Few mosquitoes will live to enter 

 your home if you apply an emulsion or oil solution of 

 one of the following insecticides to places where mos- 

 quitoes rest or hide about the home: 5-percent DDT, 

 2-percent chlordane, or 1 -percent lindane. 



These sprays are potent a week or more after they are 

 applied to surfaces. When used in this way, they are 

 known as residual or surface sprays. As long as they 

 remain on the surfaces, they kill mosquitoes that come 

 in contact with them. 



Apply residual sprays to the foundations and under- 

 pays of buildings, around buildings, between logs, on 

 tree trunks, and to the undersurfaces of leaves to a point 

 where runoff occurs. Use a small power sprayer to treat 

 large areas; use a compressed-air sprayer, or a knapsack, 

 garden, or hand sprayer to treat small areas. Adjust the 

 nozzle for a coarse spray. 



Do not spray an emulsion or oil solution on vegetation; 

 it may burn the leaves. Instead, use one of the suspen- 

 sions listed in the table above. 



Space Sprays. — There are times when you will want 

 quick relief from mosquito attacks, especially during 

 picnics, lawn parties, or other outdoor gatherings. You 

 can control mosquitoes in these places by using one of 

 the following sprays: a 1 -percent lindane emulsion or 

 oil solution; pyrethrum or allethrin, which is available 

 ready for use from insecticide dealers; or a 1 -pound 

 DDT-pyrethrum aerosol. A spray containing 5 percent 

 of DDT may also be used. But during periods of mos- 

 quito migration near dusk, pyrethrum or allethrin is 

 more effective. 



These sprays, which are used for temporary control, 

 are known as space or contact sprays. 



Apply a space spray with a hand or power sprayer (or 

 aerosol bomb ) . Aim the spray so that it will drift through 

 the bushes, grass, and other vegetation. Repeat treat- 

 ment every few hours, or as often as necessary. 



Indoors 



When you find mosquitoes inside your home, you can 

 kill them with any good household spray. 



An aerosol bomb is highly effective and convenient to 

 use. Release of the aerosol for a few seconds kills mos- 

 quitoes in an average-sized room. For best results, close 

 windows and doors during spraying and keep them closed 

 5 to 10 minutes afterwards. 



Sometimes it is necessary to apply a residual spray to 

 mosquito resting places in the home. Apply a 5-percent 

 DDT spray (an emulsion or oil solution) to dark and 

 secluded spots — under chairs, tables, beds, and bookcases, 

 in closets, behind pictures, and between furniture. The 

 insecticide should remain effective several weeks to sev- 

 eral months. 



REPELLENTS 



Repellents such as ethyl hexanediol, dimethyl, phthal- 

 ate, or dimethyl carbate give several hours of protection 

 from mosquito bites when spread on exposed parts of 

 the body and sprayed on clothing. The repellents are 

 sold as single compounds and in various combinations 

 and formulations, under different trade names. Mixtures 

 containing several of the repellents are more effective 

 than the single compounds. 



PRECAUTIONS 



Most insecticides are poisonous. Handle insecticides 

 with care. Do not use them in concentrations greater 

 than those recommended. If you spill an insecticide 

 on your skin, wash immediately with soap and water. 

 Launder clothes that become contaminated. Do not 

 contaminate foods, dishes, or utensils. Store insecticides 

 in plainly marked containers out of reach of children and 

 animals. 



