Catalogue of exhibits of insect enemies of forests and forest products at the Louisiana Purchase Exposition, St Louis, Mo., 1904 . Fig. 3. Fig. 4. Work of the Pine Destroying Beetle of the Black Hills Porest Reserve. Fig 1 Small freshly attacked pine tree, showing pitch tubes.—Fig. 2. Marks of primary gallerieson the surface of wood when bark is removed.—Fig. 3. Freshly attacked tree, showing pitchtubes Adjoining tree not attacked.—Fig. 4. Dead tree: outer bark removed by woodpeckers.(From Bui. 32. n. s., Div. of Entomology, U. S. Dept. of Agriculture.) Bui. 48, Div. of Entomology, U. S. Dept.
Catalogue of exhibits of insect enemies of forests and forest products at the Louisiana Purchase Exposition, St Louis, Mo., 1904 . Fig. 3. Fig. 4. Work of the Pine Destroying Beetle of the Black Hills Porest Reserve. Fig 1 Small freshly attacked pine tree, showing pitch tubes.—Fig. 2. Marks of primary gallerieson the surface of wood when bark is removed.—Fig. 3. Freshly attacked tree, showing pitchtubes Adjoining tree not attacked.—Fig. 4. Dead tree: outer bark removed by woodpeckers.(From Bui. 32. n. s., Div. of Entomology, U. S. Dept. of Agriculture.) Bui. 48, Div. of Entomology, U. S. Dept. of Agriculture. Plate XII,
Size: 1137px × 2196px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1904
