. Bulletin of the Department of Agriculture. Agriculture; Agriculture. :;i BULL] i : 190, . 8. Dl PARI \l i HI r»F \- .1:1- L*l i I tored in closely packed piles for Long periods. Alter the \si of 1 ruary logs Bbould be cut up into sizes as small as commercialy pi ticableand seasoned as promptly as possible; or sun-cured; or placed in the mill pond. Narrow >uip- of bark Left on the i trds and planks i* timber cut from green Logs in February and March serve to attract the insects t'> such places to lay their eggs; t the Logs should be trimmed oft and the trimmings burned. [rregular
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. :;i BULL] i : 190, . 8. Dl PARI \l i HI r»F \- .1:1- L*l i I tored in closely packed piles for Long periods. Alter the \si of 1 ruary logs Bbould be cut up into sizes as small as commercialy pi ticableand seasoned as promptly as possible; or sun-cured; or placed in the mill pond. Narrow >uip- of bark Left on the i trds and planks i* timber cut from green Logs in February and March serve to attract the insects t'> such places to lay their eggs; t the Logs should be trimmed oft and the trimmings burned. [rregular oval hole- from one-fourth to one-hali inch in diameter, filled with a mixture of coarse granular and fine powdery f: found in softwoods, are caused by the "old house ;. Fig. 37.âPitch pockets in western yellow pine, caused by unsuccessful attack. â ago, by tin- Black Hills beetle [Dendrootonua ponderoaae). A. pitch pockets In sawn board; B, «'u<l of l";; showing pitch pockets It attacks only well-seasoned wood which has been stored for more than a year. This borer continues to work l'r year-, until the wood is thoroughly perforated. All bark edges should be removed from Lumber and timber; tIn- stock should be inspected frequently for evidences of falling dust, which indicates the presence <d' these borers, and all Mich wood should be promptly burned: or the slock may be dipped in orthodichloro- benzene, if only slightly injured. POWDER POST CAUSED BY FLAT-HEADED BORERS (BUPRESTIDAE) In bald cypress in the Eastern Slates and in western redwoods and cedar-, powder-post injury is caused by flat-headed ; Hylotrupea bafulua L. - Trachyln to 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : S
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