Latex Harvesting Technologies Adapted to Clones IRCA18, IRCA 111, IRCA 130, PB 235 and PB 260 of Hevea brasiliensis (Rubber Tree) of the Class to Active Metabolism in South-Western Côte d’Ivoire

Abstract

The rubber production falls due to the tapping panel dryness that has always been a major concern in rubber cultivation. This problem is acute when it is about clones of the class to active metabolisms which are very sensitive to tapping panel dryness. In response, this study was proposed to determine the latex harvesting technologies adapted to clones of this class, to the management of the availability of work tappers hand and socio-economic conditions of the Cote d’Ivoire. Treatments S/2 d2 6d/7 nil stimulation; S/2 d3 6d/7 ET2.5% Pa1(1) 4/y; S/2 d4 6d/7 ET2.5% Pa1(1) 4/y; S/2 d4 6d/7 ET2.5% Pa1(1) 8/y; S/2 d5 6d/7 ET2.5% Pa1(1) 8/y; S/2 d6 6d/7 ET2.5% Pa1(1) 10/y were tested in an experimental randomized complete blocks on the clones IRCA 111, IRCA 130 and PB 260. The parameters measured in rubber trees were rubber yield, radial vegetative growth and the tapping panel dryness. Results show that these clones are highly productive. The tapping panel dryness rates are relatively low than usual for the clones to active metabolism. Treatments S/2 d2 6d/7 nil stimulation and S/2 d4 6d/7 ET2.5% Pa1(1) 8/y would not be suitable to harvest latex of clones of this class because they are respectively consumer of bark (exhaustion source for the tree) and increases the rate of tapping panel dryness. Against the ground by S/2 d3 6d/7 ET2.5% Pa1(1) 4/y; S/2 d4 6d/7 ET2.5% Pa1(1) 4/y; S/2 d5 6d/7 ET2.5% Pa1(1) 8/y and S/2 d6 6d/7 ET2.5% Pa1(1) 10/y are best suited to harvest latex of clones of the active metabolism class because they generate large rubber production while maintaining a good vegetative growth with low dry notch rate.