Springville Herald | 1948-04-22 | Page 8 | Deadly DDT has Effect on Flies

Deadly DDT Has Effect On Flies Who's winning in the war of man vs. insect? For a while it looked as if man were getting the upper hand, what with DDT and the host of new insecticides he discovered. But wait in the U. S. Department of Agriculture scientists report they have bred a . strain of house flies that are really tough babies. They survive ordinary doses of . DDT, and don't die until they get double shots. No such flies are known to exist in nature, and tne scientists certainly don't intend to turn their super-resistant flies loose on the public. But they have had reports that house flies are becoming more difficult dif-ficult to kill with DDT, both in some parts of the U.. S. and abroad, and they fear that natural selection may already be doing the same job that's been done in the laboratory.