The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة 74
... Hessian fly , chinch - bug and grain louse are its worst enemies . In some years over one - half of the acreage planted has been abandoned because of the Hessian fly alone . In 1900 Indiana and Ohio are estimated to have lost not ...
... Hessian fly , chinch - bug and grain louse are its worst enemies . In some years over one - half of the acreage planted has been abandoned because of the Hessian fly alone . In 1900 Indiana and Ohio are estimated to have lost not ...
الصفحة 78
Carl Kelsey. squash beetle , cotton boll weevil , cutworm , codling moth and Hessian fly . - Taking the year as a whole , 73 per cent of the meadow lark's food is insects , 12 per cent weed seeds , 5 per cent grain . The crow blackbird ...
Carl Kelsey. squash beetle , cotton boll weevil , cutworm , codling moth and Hessian fly . - Taking the year as a whole , 73 per cent of the meadow lark's food is insects , 12 per cent weed seeds , 5 per cent grain . The crow blackbird ...
الصفحة 92
... Hessian fly , the Argentine ant , the horn fly , the wood leopard moth and the elm - leaf beetle are other undesirable immigrants . In a word , some of our greatest burdens have been brought upon us by our ignorant or careless upset ...
... Hessian fly , the Argentine ant , the horn fly , the wood leopard moth and the elm - leaf beetle are other undesirable immigrants . In a word , some of our greatest burdens have been brought upon us by our ignorant or careless upset ...
الصفحة 400
... Hessian fly , 92 Hibernating animals , 47 Hill , J. A. , 336 Hoffman , F. L. , 298 Holland , birth and death rates , 333 Hollingworth , Mrs. L. S. , 325- 326 Hormones , rôle in body growth , 315 Hornaday , W. T. , 77 , 85 , 90 , 91 ...
... Hessian fly , 92 Hibernating animals , 47 Hill , J. A. , 336 Hoffman , F. L. , 298 Holland , birth and death rates , 333 Hollingworth , Mrs. L. S. , 325- 326 Hormones , rôle in body growth , 315 Hornaday , W. T. , 77 , 85 , 90 , 91 ...
الصفحة 401
... Insect pests , aphis , 74 ; boll weevil , 73 ; codling moth , 74 ; corn - root worm , 74 ; damage done to U. S. crops in 1904 , 72 ; gypsy moth , 89 ; Hessian fly , 74 ; San José scale , 89 Insects , abundance of , in wet seasons , 22 ...
... Insect pests , aphis , 74 ; boll weevil , 73 ; codling moth , 74 ; corn - root worm , 74 ; damage done to U. S. crops in 1904 , 72 ; gypsy moth , 89 ; Hessian fly , 74 ; San José scale , 89 Insects , abundance of , in wet seasons , 22 ...
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