Science Past from the issue of December 5, 1959

INSECTS WINNING RESISTANCE BATTLE — Insects appear to be winning the costly battle — $500,000 is spent each year on control — to keep them in check. Resistance to insecticides is now virtually nation-wide according to results of an extensive study.… Resistance can take many forms, research has shown. Some of these are: slow rate of absorption which prevents the insect’s getting a lethal dose of insecticide … or, avoidance of the insecticide such as is seen by some insects changing their normal habitat.