Word: pyrethrum
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
...Offered her a market into which she dumped $18,108,000 worth of odds and ends in the first five 1939 months: crabmeat, tea, pyrethrum flowers (for insecticides), chinaware, electric light bulbs, zippers, toys...
...hygiene against inbound contagion. To halt immigration of any more such pests as the corn-borer, Japanese beetle or red scale, the U. S. Public Health Service insists that all planes from South America or Asia must be sprayed. Pan American Airways conscientiously sprays its Pacific Clippers with a pyrethrum extract at each stop. Aircraft from Canada and Europe, where pests and diseases are rarer than in the plague-laden Orient, are merely inspected...
...British East Africa, the government has forbidden the killing of them there. A discovery which may furnish a better method of controlling the spread of sleeping sickness was announced recently by R. H. T. P. Harris, director of research in Zululand. He found the tsetse fly sensitive to pyrethrum (insect powder.) and veratrine (obtained from the root of the Indian poke). Especially effective was a .5% mixture of veratrine and cocoanut oil. Applied to a live animal, this mixture killed the attacking fly immediately. Since there are great stretches of land in Zululand which are unfit for agriculture, protesters...
...Pyrethrum extract...