Weekly tapping of rubber [Hevea brasiliensis] trees: agronomical, physiological and economic aspects [Ivory Coast]
1986
Eschbach, J.M. (Rubber Research Station of Ivory Coast, Abidjan)
The change from full-spiral twice a week to half-spiral stimulated aimed to decrease tapping intensity and increase productivity of the tapper. The best way of doing this was to decrease the tapping frequency and increase stimulation to maintain satisfactory yield per tree. This paper summarized the results obtained with weekly tapping frequency compared with a twice-weekly frequency on several clones in the Ivory Coast. In spite of increased stimulation, yields obtained were very often inferior, i.e. about 10% less than those obtained with two tappings per week. Not all clones reacted in the same way to a decrease in tapping intensity1548. Secondary characteristics such as dry rubber content, sucrose content and incidence of dry trees were better than with half-weekly tapping in spite of the number of stimulations being twice as high. From an economic view-point, weekly tapping greatly reduced the need for labour. The break-even point which depended on the market price and the cost of labour, if not already reached in the Ivory Coast on existing estates, had every chance of being so in view of the socio-economic advances in the developing count
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