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Annual Report of the Rubber Research Institute of Ceylon 1957


, : Annual Report of the Rubber Research Institute of Ceylon 1957. Annual Report of the Rubber Research Institute of Ceylon, 1958. 135

Hand pollination was again restricted to specific crosses between high-yielding clones with vigourous growth and, in some cases, partial resistance to Oidium heveae and Phytophthora palmivora. AVROS 163, LCB 1320, Mil 3/2, PB 5/139, PB 86, RRIC 52, Wag 6278 and Tjir 1 were used as female parents. Where possible, high yielding RRIC clones, with clones PB 86, Tjir 1 and Wag 6278 as one of the parents, were used for back crosses.

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