The Stem-Pitting Condition in Coffee

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Date
1961
Authors
Sheffield, F. M. L.
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Abstract
This condition has attracted considerable attention amongst coffee growers and research workers in recent years in both Kenya and Tanganyika. Its first onset is visible only under the microscope and consists in the formation of pockets of small, thin-walled mis-shapen cells amongst the elongated, highly lignified, thick-walled vessels and tracheids characteristic of normal woody tissue. Continued production of such abnormal tissue usually results after a time in furrowing of the outside of the wood cylinder and corresponding ridging of the inside of the bark. At this stage, the abnormality is apparent if a small piece of bark is stripped from the stem or if the stem is cut into slices and the cut surfaces are polished.
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East African Agricultural And Forestry Journal
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