eng Science and Education Publishing American Journal of Food and Nutrition 2374-1163 2021-12-07 10 1 1 15 10.12691/ajfn-10-1-1 AJFN20221011 article Diarrassouba Moussa diarra.moussa06@gmail.com 1 Tuo Seydou 2 Camara Brahima 2 Obouayeba Samuel 3 Department of Science and Technology, ¨¦cole Normale Sup¨¦rieure, Abidjan, C?te d'Ivoire UFR Biosciences, University of F¨¦lix HOUPHOUET-BOIGNY, Abidjan, C?te d¡¯Ivoire HEVEA program; Station de Recherche de Bimbresso, Centre National de Recherche Agronomique(CNRA), Bimbresso, C?te d'Ivoire Two concerns of rubber farmers are the development of latex harvesting technologies to improve the production potential of the trees and the availability and cost of labour for tapping. To achieve this, some rubber farmers opt for over-harvesting the trees. This way of doing things disturbs the physiological balance of the rubber trees, which leads to the increase of tapping Panel dryness (TPD) and rather to the fall of the production. To solve this problem, the present study proposes to define one or more latex harvesting technologies by metabolic class allowing the improvement of plantation yield and the increase of the economic life of the trees. To achieve this, the clones IRCA 111, IRCA 130 and PB 260 from the active metabolic class, GT 1, RRIC 100 and BPM 24 from the moderate metabolic class; PB 217 and PR 107 from the slow metabolic class were used as plant material. Results showed that clones in the slow metabolism class were less susceptible to TPD and performed better in intense latex harvest than those in the active and moderate metabolism classes. Regardless of metabolic class, the reduction in tapping frequency had no negative effect on the vegetative state of the trees. Instead, the reduction in tapping frequency was compensated by a large number of annual stimulations, which resulted in high dry rubber production. Analysis of dry rubber production, rubber tree radial growth and TPD rate indicates that the metabolically active class clones performed better with the S/2 d3 6d/7 ET2 latex harvesting technologies. 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. Those of the moderate metabolism class are with the motifs S/2 d3 6d/7 ET2.5% Pa1(1) 6/y; S/2 d4 6d/7 ET2.5% Pa1(1) 6/y and S/2 d5 6d/7 ET2.5% Pa1(1) 10/y. For the slow metabolism class clones, the following latex harvesting technologies were recommended: S/2 d3 6d/7 ET2.5% Pa1(1) 8/y; S/2 d4 6d/7 ET2.5% Pa1(1) 12/y and S/2 d6 6d/7 ET2.5% Pa1(1) 18/y. http://pubs.sciepub.com/ajfn/10/1/1/ajfn-10-1-1.pdf C?te d'Ivoire metabolic clone classes latex harvesting technologies hevea brasiliensis