Effect of latex harvesting techniques on agronomic and physiological parameters of IRCA 111 and IRCA130 clones of Hevea Brasiliensis (Muell. Arg.) West of Côte D’ivoire

Lack of knowledge latex harvesting techniques from Hevea brasiliensis clones results in a high rate unproductive trees and drop rubber production. In order to improve these determine the stimulation regime allowing express their production potential, study was undertaken for 6 years south-eastern part Ivory Coast. It focused on with active metabolism (IRCA 111 IRCA 130) planted at density 510 / ha (7 m X 2.80 m), bled descending semi-spiral every 4 days (S 2 d4) day rest (Sunday) stimulated Ethephon 2.5% frequencies varying 0 26 stimulations per year. The parameters measured were production, isodiametric trunk growth, physiological profile, sensitivity dry notching tree metabolic index. this experiment showed that beyond six four annual respectively 130, any increase frequency becomes very stressful tree, leading not only Of rubber, but also growth thickness. Also, had detrimental effect sugar content 130 clone. no significant inorganic phosphorus studied, other hand it caused decrease. Their thiol compounds. As notch, is noticeable two rapid activity class. However, displayed good profile optimal stimulation.