. Eastern forest insects. Forest insects. of its range, an additional 2 to 3 years may be necessary. The length of the cycle may also vary considerably in a given building. In attics, where generally warmer temperatures prevail, adults may emerge up to 2 years earlier than those in wood in the basement. The old-house borer causes severe damage in houses and other buildings. Structural timbers (fig. 73 B), framing members, and other wood parts are seriously weakened by its mining and tun- neling. Air-dried pine floor joists, plates or sills, and sub-flooring are apt to be damaged most severely.
. Eastern forest insects. Forest insects. of its range, an additional 2 to 3 years may be necessary. The length of the cycle may also vary considerably in a given building. In attics, where generally warmer temperatures prevail, adults may emerge up to 2 years earlier than those in wood in the basement. The old-house borer causes severe damage in houses and other buildings. Structural timbers (fig. 73 B), framing members, and other wood parts are seriously weakened by its mining and tun- neling. Air-dried pine floor joists, plates or sills, and sub-flooring are apt to be damaged most severely. Other framing such as studs, stair carriages, furring strips, and roof rafters are some- times attacked. When an old-house borer infestation is discovered, two types of remedial action are necessary: (1) the repair or correction of serious structural defects and (2) controlling the remaining in- sects present in wood left in place (A86). Chlorophorus annularis (F.), has been recovered from infested imported bamboo at several locations in this country, and it may be established here. The adult is blackish, with green markings on the thorax and a yellow, X-shaped mark on the elytra, and are about 10 mm. long. The first two pairs of legs and the inner parts of the antennae are red. Well-seasoned bamboo is mined exten- sively, and the mines are tightly packed with fine, powdery frass. This species is a serious pest of bamboo in India and Japan. F, 494430, 494432 Figure 73.—The old house borer, Hylotrupes bajidus: A, adults; B, 207. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Baker, Whiteford L. (Whiteford Lee), 1903-. Washington : U. S. Dept. of Agriculture, Forest Service ; for sale by the Supt. of Docs. , U. S. G. P. O
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
