. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. Fui. 74. — Winterkilled root from elm tree. Note hick of tine tilirous roots, which have Fig. 75. —Norway maple affected with Nectria cinnabarina following winterkilling of twigs. affected. Roots growing under favor- able conditions are less likely to be affected than those growing vuider poorer conditions, even in case of a single tree. The smaller, younger feeding roots are usually most severely affected, and there is a marked tendency in some species for the roots continually to die back to the trunk when the te
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. Fui. 74. — Winterkilled root from elm tree. Note hick of tine tilirous roots, which have Fig. 75. —Norway maple affected with Nectria cinnabarina following winterkilling of twigs. affected. Roots growing under favor- able conditions are less likely to be affected than those growing vuider poorer conditions, even in case of a single tree. The smaller, younger feeding roots are usually most severely affected, and there is a marked tendency in some species for the roots continually to die back to the trunk when the terminal root system is affected. In these cases numerous new lateral roots are often formed, but as the dying back con- tinues, these are eventually involved. Various fungi soon attack any part of a tree dying from root injury. Later, the bark falls off, but deteri- oration is not so rapid as in trees killed by other causes. Wliile the symptoms of dying back resulting from winterkilling of roots. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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