Word: insect
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Dates: during 1920-1929
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...very acute and precarious situation, which has already developed in other more thickly populated part of the world. To meet this, the basic principles upon which the improvement of useful plants and animals depend, must be fully elucidated, and our cultivated crops must be protected against the hordes of insect pests which would ruin them if left to their own devices...
...Theobald Smith was the first one to prove that an infectious disease can be transmitted by an insect. After working with Texas fever, a disease of cattle resembling malaria, he demonstrated that this infection is transmitted from one animal to the next by means of a tick. This discovery, made in 1893, opened up the entire field of insect-borne diseases and soon afterwards Ross discovered that human malaria is transmitted by the mosquito, and Reed, Carrol, and the Army Medical Commission demonstrated that yellow fever is transmitted also by a mosquito. Since then it has been shown that plaque...