 | 1884 - 1442 lehte
...from the report of the Entomologist (Professor CV Riley) ol ihe Department of Agriculture for 1883. the larch worm, the defoliation of spruces and firs...the destruction of spruces and firs in Cumberland and Sagadahoc and Lincoln counties, Maine, and that by their attacks they render the trees liable to... | |
 | United States. Department of Agriculture - 1883 - 610 lehte
...in localities several square miles in extent were killed. Moreover, as we bave seen in the сане of the attacks of the larch worm, the defoliation...We are now inclined to. the opinion, then, that the Bnd Tortrix is the sole or at least main cause of the destruction of spruces and firs in Cumberland... | |
 | United States. Department of Agriculture - 1883 - 614 lehte
...year, until all the trees in localities several square miles in extent were killed. Moreover, as we have seen in the case of the attacks of the larch worm, the defoliation of spruces and flrs repeated two and perhaps three summers is sufficient to either kill the tree outright, or so weaken... | |
 | United States Entomological Commission - 1890 - 1078 lehte
...year, until all the trees in localities several square miles in extent were killed. Moreover, as we have seen in the case of the attacks of the larch...main cause of the destruction of spruces and firs iu Cumberland, Sagadahoc and Lincoln Counties, Me., and that by their attacks they render the trees... | |
 | Maine Agricultural Experiment Station - 1914 - 858 lehte
...square miles in extent were killed. Moreover, as we have seen in the case of the attacks of larch worms, the defoliation of spruces and firs repeated two and...then, that the Bud Tortrix is the sole or at least the main cause of the destruction of spruces and firs in Cumberland, Sagadahoc and Lincoln Counties,... | |
 | 1914 - 456 lehte
...square miles in extent were killed. Moreover, as we have seen in the case of the attacks of larch worms, the defoliation of spruces and firs repeated two and...then, that the Bud Tortrix is the sole or at least the main cause of the destruction of spruces and firs in Cumberland, Sagadahoc and Lincoln Counties,... | |
 | Maine Agricultural Experiment Station - 1914 - 734 lehte
...square miles in extent were killed. Moreover, as we have seen in the case of the attacks of larch worms, the defoliation of spruces and firs repeated two and...then, that the Bud Tortrix is the sole or at least the main cause of the destruction of spruces and firs in Cumberland, Sagadahoc and Lincoln Counties,... | |
 | Commissioner of Agriculture - 1883 - 612 lehte
...year, until all the trees in localities several square miles in extent were killed. Moreover, as we have seen in the case of the attacks of the larch...the destruction of spruces and firs in Cumberland aud Sagadahoc and Lincoln Counties, Maine, and that by their attacks they render the trees liable to... | |
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Moreover, as we have seen in the case of the attacks of the larch worm, the defoliation of spruces and firs repeated two and perhaps three summers is sufficient to either kill the tree outright, or so weaken it that bark-boring beetles can complete the... 