Investigation on factors associated with little leaf syndrome in coffee (Coffea arabica L.)
To investigate the factors associated with the commonly occurring "little leaf" syndrome of Coffea arabica L. in South India, soil and leaf samples from both the affected and unaffected coffee plantations of Karnataka, Tamil Nadu and Kerala were collected and analysed for various constituents. It was noticed that the soil samples from plantation manifesting "little leaf" symptoms contained low amounts of total as well as available Zn. The soil test data further revealed higher PK, Ca and pH and lower organic carbon and N in soils of affected plantations than in soils of unaffected plantations without any appreciable differences in the values of available and total concentrations of Fe, Mn and Cu. Analyses of leaf samples collected from diseases as well as healthy plants indicated that the malformed leaves invariably contained less Zn; while P and K in the affected leaves were found to be in higher concentrations. The concentrations of Ca, Fe and Cu were low in leaves of diseased plants compared to the values in healthy plants. Leaf Mn was found to be erratic
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
1987
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| Subjects: | COFFEA ARABICA, DEFICIENCIA DE MINERALES, CINC, ATROFIA FOLIAR, INDIA, |
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