Pear trees of the cv. 'Hardy' worked on 'Quince A' rootstocks were less damaged by the pear decline disease than those on seedlings of Pyrus communis cv. 'Kirchensaller Mostbirne'. Diseased trees on ...

Many fruit trees, ornamental flowering trees and shade trees have something in common: The above-ground portion is not the same variety, or even the same species as the root system. They are assembled ...