120 DDT— Killer of Killers 



with a dengue-type mosquito. An airplane was loaded 

 with DDT powder instead of with bombs, the island was 

 thoroughly dusted, and not a mosquito or fly was to be seen. 

 Within a few weeks, dengue was no longer a problem to the 

 medical service. 



But we were speaking about treating the breeding 

 grounds of the mosquito. Let's get back to the subject. We 

 said a while ago that oil applied to stagnant bodies of water 

 will kill the larvae. But, one quart of 5 % DDT-oil solu- 

 tion is as effective as 10 to 14 gallons of oil alone. In fact, 

 DDT is probably the most effective mosquito larvicide yet 

 developed. As little as %o pound of DDT per acre applied 

 as an oil solution, a dust, or an emulsion to water surfaces or 

 vegetation prevents the development of larvae for weeks. 

 For stagnant waters, 1 part of DDT per 100,000,000 parts 

 of water will kill the larvae and pupae of many types of 

 mosquitoes, although for some species, a somewhat higher 

 dosage is required. 



Ants in Your Pantries 



Ants are the delight of sociologists, for in social devel- 

 opment ants are centuries ahead of man. A colony of ants 

 busily engaged in carrying out the multitudinous activities of 

 their daily life is a sight worth witnessing. Yet, it is a de- 

 pressing experience, for one can't help but feel that ants know 

 much more about efficient organization of community life 

 than man can ever hope to learn. Watch the ants closely! 

 Each one seems to know just what to do — and he does it. 

 No strikes, no picket lines, no unemployment! But maybe 

 ants are just dumb. What's the sense of working all day, 

 every day? Where does it get you anyway? Nevertheless, 



