The Scientific Monthly, Volumen8James McKeen Cattell American Association for the Advancement of Science, 1918 |
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Página 109
... insects in the carriage of certain diseases , the ease and frequency of such transfer becoming intensified wherever great bodies of men are brought together , as in great construc- tion projects , and especially in great armies . They ...
... insects in the carriage of certain diseases , the ease and frequency of such transfer becoming intensified wherever great bodies of men are brought together , as in great construc- tion projects , and especially in great armies . They ...
Página 110
... insect - borne diseases in the eastern expeditions ; and it is most interesting to realize that , although the need for the services of trained entomologists with the troops was not realized at first , later every sanitary unit in the ...
... insect - borne diseases in the eastern expeditions ; and it is most interesting to realize that , although the need for the services of trained entomologists with the troops was not realized at first , later every sanitary unit in the ...
Página 111
... insect pests , and to a lesser extent by the character of the winter of 1916-1917 , which also was a hard one for injurious insects , the economic entomolo- gists , including the demonstrators , accomplished much . Owing to peculiar ...
... insect pests , and to a lesser extent by the character of the winter of 1916-1917 , which also was a hard one for injurious insects , the economic entomolo- gists , including the demonstrators , accomplished much . Owing to peculiar ...
Página 112
James McKeen Cattell. tain insects not hitherto notably conspicuous appeared in great abundance and added new problems to the production of certain crops . A notable example of such insects was the potato aphis , a species which ...
James McKeen Cattell. tain insects not hitherto notably conspicuous appeared in great abundance and added new problems to the production of certain crops . A notable example of such insects was the potato aphis , a species which ...
Página 113
... insect attack , the planting of these large areas was immediately followed by the increase of certain in- jurious insects and by serious damage to the growing plants by the southern army worm and other species . Entomologists were at ...
... insect attack , the planting of these large areas was immediately followed by the increase of certain in- jurious insects and by serious damage to the growing plants by the southern army worm and other species . Entomologists were at ...
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