SUMMARY 



i. The rural and small city population of the state is awaken- 

 ing to the possibilities of malaria control. 



2. The losses due to malaria do not only consist in direct loss 

 through drug and physicians' bills, but most especially in indirect 

 losses through personal inefficiency and reduction in real estate 

 valuation. 



3. Malaria is a mosquito-borne disease in which the Anophe- 

 line species are concerned, and the control of this disease is there- 

 fore dependent on the control of the mosquito as the cheapest 

 and most efficient method. 



4. The Anopheline mosquitoes as well as other species of mos- 

 quitoes must have water in which to breed. A thimbleful of 

 water is enough to breed these insects. Partially overflowed 

 pasture land is ideal. This condition is often produced by leaky 

 irrigation ditches or water pipes. 



5. Proper drainage is absolutely necessary; where this can- 

 not be attained, the application of oil sprays, either crude and 

 kerosene mixed approximately equal parts or stove distillates of 

 about 30 Beaume. 



6. Oil must also be applied when drainage does not result in 

 dry conditions before the larva; or pupae are ready to emerge as 

 adults. 



7. If oil is used, it must be applied repeatedly every twelve 

 days during midsummer, less often in early spring and late autumn. 



8. While malaria usually makes its appearance with irrigation, 

 the latter is only indirectly the cause and is absolutely dependent 

 on the slipshod methods in vogue in northern and central Cali- 

 fornia. In the southern part of the state there is as much, if 

 not more, irrigation, and malaria is virtually unknown. 



9. Houses should be well screened in order to keep out mos- 

 quitoes at night. It pays to spend some time in searching for 



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