Gummosis is the formation of patches of a gummy substance on the surface of certain plants, particularly fruit trees.[1] This occurs when sap oozes from wounds or cankers as a reaction to outside stimuli such as adverse weather conditions, infections, insect problems, or mechanical damage. It is understood as a plant physiological disease.[2]
Damage
editLiquefaction of wood pieces, especially young wood, causes disease foci to form under the bark, which secrete a gummy colorless to amber liquid, a plant gum, which then oozes out between the bark pieces on branches and trunk. The gum is composed of various sugar compounds and acids.
Causes
editThe main causes are physiological disturbances of the tree, which can affect the water balance, among other things. Frost, injuries, but also bacteria and fungi, especially of the genus Hallimasch (Armillaria), can contribute to gum flow.
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Plant sap rises from the bark of a cherry tree -
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References
edit- ^ Boothby, Derek (January 1983). "Gummosis of stone‐fruit trees and their fruits". Journal of the Science of Food and Agriculture. 34 (1): 1–7. doi:10.1002/jsfa.2740340102. ISSN 0022-5142.
- ^ "Gardening in Georgia. Accessed : 2010-06-01". Archived from the original on 2007-08-31. Retrieved 2010-06-01.
External links
edit- [1] Video and commentary on gummosis on a cherry tree.
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