Root grafting is sometimes performed in nurseries on parts of the roots of removed trees, when the proper stocks are scarce; in which case the root of the white thorn has been resorted to as a stock both for the apple and pear.
Dutch Elm Disease is caused by the fungus Ceratocystis Ulmi that is transmitted by two species of bark beetles or by root grafting.
Symptoms: ...
 See also: Root, Graft, Grafting, Branch, Plant
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