Latex yield by ten clones of rubber tree (Hevea spp) cultivated in high plain and coastal region of Brazil

Abstract

This study was carried out in order to evaluate the yield of ten clones of rubber tree (Hevea spp) in the State of São Paulo, Brazil. The yield data were collected during 16 years from trees cultivated in a Coastal Region at the Experimental Station "Vale do Ribeira" (Pariquera-Açu) and during 17 years in high plain at Experimental Center "Theodureto de Camargo"(Campinas).Comparing annual average yield by Tukey test it was found that the most productive clones are RRIM 600 and BSA 20. The first is cultivated at the Experimental Station and the other at the Experimental Center. Following the best ones, there is an intermediate group formed by clones Ga 1328, Tjir 16, C 228, RRIM 526, C 297, LCB 510 and Fx 25, all of them planted at the Experimental Center. Clones Fx 25, C 290 and RRIM 600 cultivated at the Experimental Center are among the least productives. The Fx 25 clone showed low yield in both regions, although its yield was higher at the Experimental Station than at the Experimental Center. The same was found for the clone RRIM 600.