Adoption of rubber clones/seedling trees in the estate sector in India: recent trends.

摘要

A survey was conducted in 96 estates in the traditional and non-traditional rubber growing regions in India to evaluate the planting materials used and the response of the estate sector to the planting recommendations of the Rubber board since 1991. Results indicated a switching to the use of new promising clones since the 1980s. RRII 105 was the single major clone used in rubber cultivation in the 1980s and 1990s, and will remain as a promising clone until the introduction of new clones with higher productivity and better secondary attributes. The age of planting materials in estates indicated the low rate of replanting in recent years, as showed by the high percentage of trees aged 25 years and above.