De Silva, R.L.Wettasinghe, D.T.Calnaido, D.2014-11-182014-11-181972Tea Quarterly43(3)pp.62-84https://dl.nsf.gov.lk/handle/1/12703AgricultureTea productionNorth-East IndiaDarjeeling districtPestPlant diseasesFertilizerResearch and DevelopmentAssamA