Science: This Summer--DDT

Some commercial DDT preparations available to U.S. householders and gardeners have proved 1) disappointingly feeble, 2) harmful to plants and animals. But the U.S. Department of Agriculture last week declared that DDT, properly used, is still the best insecticide. To help citizens prepare for their annual battle with the bugs, the Department gave out some advice:

For flies, mosquitoes, bedbugs, roaches: Use a 5% DDT solution in kerosene, painted or sprayed on screens, walls, mattresses, under sinks, shelves. It is good up to six months but a fire hazard when first applied. Aerosol...

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