 | United States. Department of Agriculture - 1883 - 614 páginas
...following query t ¡i. Do the beetles hibernate in the ground, so that they can be poisoned, or aro they perpetuated only by the eggs on the trees? Allow...investigation as necessary to the devising of proper remedios against this foreign invader: 4. How soon do the insects appear in the spring; how rapidly... | |
 | 1883 - 632 páginas
...the trees. He also propounded the following query : 3. Do the bei - - •• • •beetles hibernate in the ground, so that they can be poisoned, or are they perpetuated only by the eggs on the trees f Allow me to add the following subjects for investigation as necessary to the devising of proper remedies... | |
 | United States. Department of Agriculture - 1883 - 610 páginas
...the trees. lie also propounded tho following query : 3. Do the beetles hibernate in the ground,' во that they can be poisoned, or are they perpetuated only by the eggs on the trees f Allow me to add the following subjects for investigation as necessary to the devising of proper remedies... | |
 | United States. Bureau of Entomology - 1883 - 682 páginas
...ascending and descending the trees. He also propounded the following query : II. Do the beetles hibernate in the ground, so that they can be poisoned, or are...proper remedies against this foreign invader : 4. Hon- soon do the insects appear in the spring ; how rapidly do they propagate ; and what time is passed... | |
 | 1887 - 452 páginas
...He also propounded the following query: 3. Do the beetles hibernate in tho ground, so that they cau be poisoned, or are they perpetuated only by the eggs...is passed in each stage of development? 5. Are the larva- and beetles eaten by insectivorous birds, or are they protected by offensive secretions, as... | |
 | 1883 - 684 páginas
...ascending and descending the trees. He also propounded the following query: 3. Do the beetles hibernate in the ground, so that they can be poisoned, or are...appear in the spring; how rapidly do they propagate: aud what time is passed in each stage of development? 5. Are the larva; and beetles eaten by insectivorous... | |
 | Commissioner of Agriculture - 1883 - 612 páginas
...also propounded the following query : 3. Do the beetles hibernate in the ground, so that they can he poisoned, or are they perpetuated only by the eggs on the trees Î Allow me to add the following subjects for investigation as necessary to the devising ef proper... | |
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He also propounds the following query : (3) Do the beetles hybernate in the ground so that they can be poisoned, or are they perpetuated only by the eggs on the trees? Allow me to add the following subjects for investigation as necessary to the devising... 