 ... the passage becomes clogged and the burrow more or less filled with the coarse and fibrous fragments of wood, to get rid of which the grubs are often obliged to open new holes through the bark. The seat of their operations is known by the oozing of...  The Canadian Entomologist - Página 1381878Vista completa - Acerca de este libro
 | 1881 - 284 páginas
...bark. The seat of their operations is known by the oozing of the sap and the dropping of the sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large porous tumors, cansed by the efforts of... | |
 | 1914 - 1368 páginas
...the tree. The seat of their operations is known by the oozing of the sap and the dropping of sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunks and the limbs become disfigured by large porous tumors. The grubs attain their full size by the twentieth... | |
 | 1915 - 968 páginas
...the tree. The seat of their operations is known by the oozing of the sap and the dropping of sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunks and the limbs become disfigured by large porous tumors. The grubs attain their full size by the twentieth... | |
 | United States Entomological Commission, Alpheus Spring Packard - 1890 - 1060 páginas
...bark. The seat of their operations is known by the oozing of the sap and the dropping of the sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large poron» tumors, caused by the efforts... | |
 | United States Entomological Commission - 1890 - 1078 páginas
...seat of their operations is known by the ooziag of the sap and the dropping of the sawdust from th« holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large porona tumors, caused by the efforts of... | |
 | United States Entomological Commission, Alpheus Spring Packard - 1890 - 1058 páginas
...their operations is known by the oozing of the sap and the dropping of the sawdust from the holes. Tbe bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large porous tumors, caused by the efforts of... | |
 | 1891 - 754 páginas
...is known bv the oozing of the sap, and the dropping of the sawdust from the holes. The bark aroiind the part attacked begins to swell, and in a few years the trunk and limbs become disfigured and weakened by large porous tumors, caused by the efforts of the... | |
 | Pennsylvania. Department of Agriculture - 1897 - 886 páginas
...entrance. The seat of their operations is known by the oozing of the sap and the dropping of the sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfig ured and weakened by large porous tumors, caused by the effort of... | |
 | Pennsylvania. Department of Agriculture - 1898 - 348 páginas
...holes. The .bark around the part attacked begins to swell, and in a few years the trunk and liirbs will become disfigured and weakened by large porous...trees to repair the injuries they have suffered." The beetle is about three-fourths of an inch in length, velvet black and ornamented with yellow transverse... | |
 | Pennsylvania. Department of Forests and Waters - 1898 - 346 páginas
...bark. The seat of their operations is known by the oozing of the sap and the droppings of the sawdust from the holes. The bark around the part attacked begins to swell, and in a few years the trunk and limbs will become disfigured and weakened by large porous tumors, caused by the efforts of... | |
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