Résumé
Tapping panel dryness (TPD) affects natural rubber production. TPD is associated with clonal susceptibility, overexploitation of rubber trees and environ mental stress. Many studies have been conducted at the histological, physiological and molecular levels based on a binary point of view of the absence or presence of TPD. The dynamic analysis of the TPD onset through the monthly monitoring of the dry eut length revealed the presence of more or less important dry spots on the tapped panel of any trees, while brown bast is associated with a high Level of dry eut length. The content in latex diagnosis components tend to decrease with the occurrence of TPD. The sucrose content value of clones is negatively associated with TPD. The high tapping frequency and stimulation dl ET 12/year is a suitable method for inducing early TPD occurrence. This study suggests using an intensive harvesting system and monitoring of the dry eut length for genetic analysis of TPD.