Word: pyrethrum
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...famous "bug bombs" (aerosol sprays) are excellent for a limited purpose. They should contain both DDT and pyrethrum (or some similar toxicant). The pyrethrum knocks flies and mosquitoes down quickly. The slower DDT keeps them from rising again. But bug bombs leave no appreciable residue. Bugs that arrive in the room after the air has cleared remain in good health...
...these items would be available in any quantity before Christmas, but the words rolled on the tongue like bubble sum. Some U.S. citizens even enjoyed knowing that there were no more restrictions on cotton linters, natural resins, green bone glue, horse mane hair and an insecticide named pyrethrum...
Besides DDT, three other highly effective weapons have been developed for the Army & Navy: 1) an insect "bomb," consisting of a small can which, when opened, releases an "aerosol" gas loaded with an insecticide (such as DDT or quick-killing pyrethrum) that instantly fills a room; 2) a new mosquito repellent, "Formula 6-12," which smells like witch hazel and is reported to be six times as effective as 100% citronella; 3) N.M.R.I. 201, a still more effective repellent just developed by the Navy, said to last eleven hours...
...biggest human setback has been loss of pyrethrum, far & away the deadliest prewar insecticide, of which almost the entire supply came from Japan. The substitutes on which bug fighters now chiefly rely are the new Lethanes (not so deadly) and sodium fluoride (dangerous because poisonous to man). One of the most effective exterminators is ultra-deadly hydrocyanic gas, but against it there is a city ordinance...
...Amazing is the chemists' progress against bugs. Every soldier now carries a tin of powder (pyrethrum plus a synthetic insecticide called IN-930) with which he can deflea himself in a jiffy, a tiny vial of fumigator (methyl bromide) with which he can quickly delouse his clothes in a sealed paper...