Gummosis
Rubber River (also known as gummosis gummosis or ) is a disease of deciduous trees, preferably stone fruit trees of the genus Prunus ( cherry, apricot, plum, etc.).
Damage
Due to the liquefaction of wood parts, especially young wood, formed under the bark disease herd that secrete a gummy colorless to amber liquid, which then exits between the pieces of bark on branches and trunk. The liquid consists of various sugars and acids.
Causes
The main cause is a physiological disorder of the tree, which may affect the water balance among others. But Frost, bacteria, fungi and injuries, especially of the genus Armillaria ( Armillaria ) can contribute to gum river.
Effects
Twigs and branches die off after some time. In young trees, the root can in rare cases die.