80 DDT— Killer of Killers 



does not make a good space spray: it will kill all the insects 

 at your party, but not until after the guests have gone home. 

 The logical answer? Use enough DDT to give prac- 

 tically 100% kill. This does not require a high concentra- 

 tion — perhaps /4 to 1 %. And then add enough pyrethrum 

 or one of the thiocyanates to give practically 100% knock- 

 down. Since you are not depending upon these latter ma- 

 terials for kill but only for knockdown, you need much small- 

 er concentrations than you would if you had to depend upon 

 these agents for both knockdown and kill. 



The Killing Mist 



During the war, about sixteen million little bombs were 

 distributed to our fighting men. These bombs contained no 

 high explosive, but they spelled death to many a lurking 

 enemy — Anopheles, the malaria-bearing mosquito. 



On every Pacific island that formed a stepping stone to 

 Japan, our soldiers, sailors, and marines found that mosquitoes 

 swarmed in the jungles. It wasn't so bad during the day, 

 for mosquitoes shun the sun. But at night, when all was 

 dark and still, they searched out the sleeping forms of men 

 and had their midnight snacks. Mosquito netting on bar- 

 racks windows and across the end of tents kept out the tiny 

 marauders at night. But what about the mosquitoes that 

 managed to get in during the day and went into hiding, wait- 

 ing until it got dark and the men were asleep so that they 

 could slip out and attack without interference? 



That's where these little bombs — the aerosol bombs- 

 came in so handy. A flick of the valve, and within a few 

 seconds the room or tent was filled with a mist of DDT and 

 pyrethrum; and the mosquitoes dropped dead in mid air, or 



