. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 26 . Dl PAH i I \..l:|. il.! in w >ji<iw ili of the tree, or they may have been enlarged 03 carpei ants. This type of injury can be re ogn zed ae 1 illo il) In the sapwood and heartwood of hardwoods very larsi cular holes, one-naif to 1 inch in diameter, are open and tmt slightly stained and are usually Lined with a silky yellowish-brown wnit Logs of softwoods, <⢠li ief 1 y pine, very irregular holes are narrowly oval. without -lain. Imt surrounded by much pitchy " Light- wood," or ** fatwood,"
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 26 . Dl PAH i I \..l:|. il.! in w >ji<iw ili of the tree, or they may have been enlarged 03 carpei ants. This type of injury can be re ogn zed ae 1 illo il) In the sapwood and heartwood of hardwoods very larsi cular holes, one-naif to 1 inch in diameter, are open and tmt slightly stained and are usually Lined with a silky yellowish-brown wnit Logs of softwoods, <⢠li ief 1 y pine, very irregular holes are narrowly oval. without -lain. Imt surrounded by much pitchy " Light- wood," or ** fatwood," and are very tightly pac ked w i t li fine granular frass '' (Wis. 24) (7). (5) Pin ho 1 e - or wormholes in soft- wood logs and lum- ber in the Northern State- are caused by a melandryid timber These larvae gain entrance to the living sapwood through scars or blazes and also attack recently felled timber. The holes are filled with fine sawdust. GRUB-HOLE INJURY TO GREEN SAW LOGS AND LUMBER; A PREVENTABLE LOSS All types of borer holes other than those meni ioned above are made after the trees have been felled, and are preventable by proper methods of handling the logs. These borer hole- occur in the sap-. 9 âPowder-posted white ash shipbuilding lumber showing larval burrows and exit boles of adults of Lyctua planicollia; hoard from a closely piled stack of lumber throughout which larvae bad burrowed 16This injury is found principally in oak, chestnut, locust, and cherry and is caused by the carpenter worm, Frionoxyatus rooinUui Peck. *>These holes are found principally In oaks and :m> caused by 'ho round-headed borers (Cerambycidae) Goes Bpp. and Romaleum Bp.; in hickory, they are caused by Goes Bp.; in hickory in the South, small darkly stained holes are caused by a w l-borlng cater- pillar, Coaaula magnified Bailey; and' in hard maple they are caused by the maple-tree borer, Qlycobtua specioaua Bay. ''This Injury is caused by Poruwdro brvnnea Fab. ''â 'Thi
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