Laboratoire de Physiologie et de Pathologie végétale, Unité de formation et de Recherche d’Agroforesterie, Université Jean Lorougnon Guédé de Daloa, Côte d'Ivoire
The physiological parameters of latex micro-diagnosis, operation for determining the physiological state of the rubber production system is subject to seasonal fluctuations. These parameters are likely to be influenced by climate change and the retention period of latex and serum TCA, separately. Thus, working to determine optimal conditions for the realisation of this diagnosis were conducted in Côte d'Ivoire. Relatively to the retention periods of serum TCA on the stability of physiological parameters, measurement parameters were done 4, 8, 12, 24, 48 and 72 h after harvesting latex at field. About the seasonal parameters evolution, measuring of physiological parameters were performed 4 h as before, corresponding the days of trees bleeding, during the period ranging from October to December 2013. The results obtained showed that the latex samples taken in October (period of low volatility of physiological parameters) and conservation of latex and serum TCA or less on time for 4 h constitute the optimal conditions for achieving latex micro-diagnosis from Hevea brasiliensis in Côte d’Ivoire.