 | 1875 - 766 lehte
...excessive or continuous, and especially in the case of yonng trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of...protection to both the larva and the chrysalis. The chrysalis contained in the cocoon is cylindrical, smooth, narrow, blackish-brown, about 16 millimeters... | |
 | 1877 - 508 lehte
...excessive or continuous, and especially in the case of yonng trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of...protection to both the larva and the chrysalis. The chrysalis contained in the cocoon is cylindrical, smooth, narrow, blackish-brown, about 16 millimeters... | |
 | 1877 - 512 lehte
...excessive or continuous, and especially in the case of yonng trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of...protection to both the larva and the chrysalis. The chrysalis contained in the cocoon is cylindrical, smooth, narrow, blackish-brown, about 16 millimeters... | |
 | 1878 - 932 lehte
...trees, has proved fatal. In July, the worm spins a whitish, thin, papery cocoon in the mass of exuded pitch, which seems to act as a protection to both the larva and chrysalis. Thejwpa is cylindrical, smooth, narrow, blackish-brown, about 16 millimetres io length.... | |
 | Geological and Geographical Survey of the Territories (U.S.) - 1878 - 208 lehte
...trees, has proved fatal. In July, the Worm spins a whitish, thin, papery cocoon in the mass of exuded pitch, which seems to act as a protection to both the larva and chrysalis. The pupa is cylindrical, smooth, narrow, blackish-brown, about 16 millimetres in length.... | |
 | 1881 - 284 lehte
...insertion of the branch. The worm in July spins a whitish, thin, papery cocoon in the mass of exnding pitch- which seems to act as a protection to both...branches ; and from the fact that the pitch of the trecs protects the caterpillars no wash would injure the insect; henee extermination with the knife... | |
 | United States Entomological Commission - 1890 - 1078 lehte
...the exuding pitch that they are suffering from the attacks of this insect. The wound occurs on tbe main stem below the insertion of the branch. The worm...hence extermination with the knife is the only remedy. that there is scarcely a pine more thau 4 feet high on his grounds which is not more or less affected... | |
 | 1915 - 870 lehte
...though under the same space of infestation, by lining it writh silky thread. Packard states * that "the worm in July spins a whitish, thin, papery cocoon...a protection to both the larva and the chrysalis." This applies to the insect in the East. In the West the caterpillar of the pine pest restricts its... | |
 | Entomological Society of Ontario - 1877 - 572 lehte
...has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of exuding pitoh, which seems to act as a protection to both the larva and the chrysalis. The chrysalis contained in the cocoon is cylindrical, smooth, narrow, blackish-brown, about 16 millimetres... | |
 | Entomological Society of Ontario - 1872 - 492 lehte
...excessive or continuous, and especially in the case of young trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of...protection to both the larva and the chrysalis. The chrysalis contained in the cocoon is cylindrical, smooth, narrow, blackish-brown, about 16 millimetres... | |
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... trees, has proved fatal. In July the worm spins a whitish, thin, papery cocoon in the mass of exuding pitch, which seems to act as a protection to both the larva and the chrysalis. 