This study aims at describing the sucrose balance between supply and utilization in the latex producing bark of the tubber tree, as well as the concurrent latex metabolic activity. Experiments were set up on 3 Hevea brasiliensis clones (PB235, RRIM 600 and GT1) on the same polyclonal plot of Chachoengsao Rubber Research Center (CRRC-DOA). Treatments included untapped trees (growth potential control), trees tapped without stimulation (½ S d/3 6d/7 9m/12, physiological control) and trees tapped with Ethephon stimulation (½ S d/3 6d/7 9m/12 ET 2.5% 5/y and 12/y). The results confirmed the significant effect of tapping on whole trunk latex physiology. A huge depletion of the latex sucrose concentration was demonstrated. The Latex Diagnosis Mapping method (LDM) allowed a rather precise description of the shape and the size of the latex regeneration area and the metabolically active bark area. A multi-clonal linear relation between rubber production and estimated latex regeneration area indicates that the regeneration of 1 g of dry rubber requires an average of ca. 100 cm2 latex regeneration area. By assessing the impact of any tapping system on whole trunk latex physiology, the LDM method could be used successfully in order to provide new ideas for imagination and/or optimization of new tapping systems like ethylene gas stimulated systems, micro-tapping cut systems and multi-tapping cut systems, as based on a better physiological knowledge of the whole rubber tree functioning. In Thailand, the rubber tree (Revea brasiliensis Muell. Arg.) is one of the major economic crops, as it directly or indirectly supports around 10 % of the country population. Concerning on economic value, not only latex production, but also wood timber brings about a significant income to the farmers. Both rubber production and growth require assimilates from photosynthesis, mainly in the form of sucrose. As farmers' benefit relies on a suitable management in order to keep a suitable balance betwee