 | 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...will become disfigured and weakened by large porous tumors, cansed by the efforts of the trees to repair the injuries they have suffered. According to... | |
 | 1914 - 1368 páginas
...trunk of 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... | |
 | 1915 - 968 páginas
...trunk of 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... | |
 | Kansas State Horticultural Society - 1889 - 518 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... | |
 | Kansas State Horticultural Society - 1889 - 522 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... | |
 | Kansas State Horticultural Society - 1889 - 516 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... | |
 | United States Entomological Commission, Alpheus Spring Packard - 1890 - 1060 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...limbs will become disfigured and weakened by large poron» tumors, caused by the efforts of the trees to repair the injuries they have suffered. According... | |
 | 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...limbs will become disfigured and weakened by large porona tumors, caused by the efforts of the trees to repair the injuries they have suffered. According... | |
 | 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...will become disfigured and weakened by large porous tumors, caused by the efforts of the trees to repair the injuries they have suffered. According to... | |
 | 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 trees to repair... | |
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... 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... 
