North Eastern Tea Association mainly grown. Although Assam produces 52.9% of the country’s total tea production as opposed to Bengal which produces 24.8%, the Tea Board is headquartered in Kolkata (Calcutta). NETA also urged the Tea Board to make an amendment in the definition of Small Tea Grower in order to accommodate the one who holds land up to 50.6 hectares as a small tea grower. The organization also emphasizes on the growth of high quality tea from time to time and advises the tea planters and tea growers of the region to produce quality tea to attract buyers in the international markets. NETA
Tea production in Sri Lanka biological control (a parasitic wasp, "Macrosentus homonae") to suppress the Tea Tortrix caterpillar, which had threatened the tea crop. In 1941 the first Ceylonese tea broking house, M/s Pieris & Abeywardena, was established, and in 1944 the Ceylon Estate Employers' Federation was founded. On October 1, 1951, an export duty on tea was introduced and in 1955 the first clonal tea fields began cultivation. In 1958, the State Plantations Corporation was established, and on June 1, 1959, Ad Valorem Tax was introduced for teas sold at the Colombo auctions. By the 1960s, Sri Lanka's total tea production and exports exceeded