Effectiveness of gaseous stimulation in low intensity latex harvesting in rubber plantations of Sri Lanka

Prevailing high price for rubber attracts growers to practise ethylene based gaseous stimulated harvesting as a method of efficient utilization of high panels and obtaining high yields at the last stage of the rubber tree. With no previous records, the present study was aimed to assess the effectiveness of gaseous stimulated harvesting systems in large scale application under Sri Lankan conditions. This system was found to be financially viable in terms of increased overall profitability and benefit cost ratio. Agronomically, it was effective with reduced bark consumption lengthening the harvesting period and increased worker use efficiency. Harvesters’ income increased with the application of the system motivating workers to be engaged in latex harvesting. In order to assure the full benefits, proper application and maintenance of the system and monitoring of tapping quality are essential. Potential reduction in the price of gas jacket and increase in tapping task size are also critical factors for the profitability of the system. Effect of the price of rubber and other commodities on the overall profitability is also discussed.