 ... 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...  American Agriculturist - Página 3451846Vista completa - Acerca de este libro
 | Thaddeus William Harris, Massachusetts. Zoological and Botanical Survey - 1841 - 484 páginas
...new holes through the bark. The seat of their operations is known by the oozing of the sap and the dropping of the saw-dust from the holes. The bark...part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts... | |
 | Cuthbert William Johnson - 1844 - 1210 páginas
...new holes through the 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...part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumours, caused by the efforts... | |
 | Daniel Jay Browne - 1846 - 548 páginas
...together, and at intervals of five or six minutes, till her whole stock is safely stored. The eggs are soon hatched, and the grubs immediately burrow into...will become disfigured and weakened by large, porous tumours, caused by the efforts of the trees to repair the injuries they have suffered." According to... | |
 | Thaddeus William Harris - 1852 - 536 páginas
...new holes through the 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...part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts... | |
 | American Institute of the City of New York - 1853 - 550 páginas
...their operations is known by the oozing of the sap and the dropping of the saw dust from the hoh s The bark around the part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the •efforts... | |
 | Thaddeus William Harris - 1862 - 700 páginas
...new holes through the 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...part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts... | |
 | Cuthbert William Johnson - 1869 - 1296 páginas
...new holes through the 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...part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumours, caused by the efforts... | |
 | 1878 - 798 páginas
...bark. The seat of their operations is known by the oozing of the sap and the dropping of the saw dust from the holes. The bark around the part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts... | |
 | 1879 - 530 páginas
...bark. The seat of their operations is known by the oozing of the sap and the dropping of the saw dust from the holes. The bark around the part attacked begins to swell, and in a few years the trunks and limbs will become disfigured and weakened by large porous tumors, caused by the efforts... | |
 | 1881 - 284 páginas
...new holes throngh the 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...become disfigured and weakened by large porous tumors, cansed by the efforts of the trees to repair the injuries they have suffered. According to thr observations... | |
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