Investigations on Diseases of the Coconut Palm in Travancore - Cochin State -Studies on Soil Conditions in Relation to Disease Incidence
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2007-02
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Abstract
1. The coconut palm appears to thrive fairly well in all the three main soil types found in the Tra-vancore-Cochin State. 2. Disease appears in trees growing in all these soil types and the disease symptoms are uniformly thesame irrespective of the locality and nature of the soil type. 3. Compared to healthy areas the results of analysis of soil samples from diseased areas show a highly depleted condition in the major plant food factors particularly in the content of available potash. 4. The soils from diseased areas have a very low clay content and consequently a very low water holding capacity. 5. The base exchange properties of the soils from diseased areas, the composition of the clay fraction etc. reveal that the soils are of a very poor type from point of view of fertility. 6. Various factors which appear to be individually or collectively responsible for the disease incidence are discussed and future lines of work briefly indicated. 7. Additional evidence has been presented with regard to the importance of soil conditions in relation to disease incidence.
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Indian Coconut Journal Jan-Mar 1950 p-81-87 & 87-105