Injuries to Forests And Forest Products By Roundheaded Borers

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Injuries to Forests And Forest Products By Roundheaded Borers
Jesse Lee Webb
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The same period represents the time when eggs are deposited for another gen- eration.
The usual preventive measures are recommended, i. E.. Remov- ing the bark from trees when felled or treating rustic work as recommended for the black- horned pine borer, except those felled in late fall or early winter, which should not be injured by this borer.
THE AVESTERN CEDAR BARK-BORER.
(Hylotrupes ametliy 'stiiuis Lee. ) The western cedar bark-borer is a relative of the preceding, the cedar-tree borer.
...Unlike the latter, however, its range is con- siderably restricted. The rec- ords of the branch of forest in- sect investigations, Bureau of Entomology, indicate that it is found only in the Pacific Coast States. It is of considerable eco- nomic importance, however, in injuring the bark and wood of recently felled giant arborvita? and incense cedar.
The larva (fig. 25, a) is a large, fleshy, yellowish-white grub, provided with three pairs of feet. The largest larvae are about 25 mm. Long at maturity and about 8 mm.


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