. The story of agriculture in the United States. ERA OF SCIENTIFIC AGRICULTURE 297. studies the lives of the insects that live in our fieldsand orchards, to discover how to destroy those thatdamage the crops. It wasin this way that some fortyyears ago Paris green wasfirst used to kill potato scientific knowledgeof the codhng moth, or appleworm, and its proper treat-ment, it would be impossibleto produce the millions ofbushels of apples that makeour yearly crop. The fifehistories of the Hessian fly Australian Ladybird and the boll weevil have Also, onthe branch, the white scale of
. The story of agriculture in the United States. ERA OF SCIENTIFIC AGRICULTURE 297. studies the lives of the insects that live in our fieldsand orchards, to discover how to destroy those thatdamage the crops. It wasin this way that some fortyyears ago Paris green wasfirst used to kill potato scientific knowledgeof the codhng moth, or appleworm, and its proper treat-ment, it would be impossibleto produce the millions ofbushels of apples that makeour yearly crop. The fifehistories of the Hessian fly Australian Ladybird and the boll weevil have Also, onthe branch, the white scale of taught us how to control the ^^ ^ ^^>^^^^^ ^^ ^^ ^^^^>^-destructive work of these pests. Entomologists have discovered insects that are enemiesof various pests: a fly was brought from Spain as theenemy of the apple worm; to destroy the citrus scale aminute ladybird was found in Australia; for the blackscale another ladybird was found in Africa. In somestates the authorities keep on hand the insects that willkill certain pests, and they are furnished to the growerswhose cro
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
