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Item A note on the effect of different copper preparations on tea yield(Tea Research Institute. Thalawakele, 1958) Visser, T.; Shanmuganathan, N.; Sabanayagam, J.V.Item Studies on collar and branch canker of young tea (phomopsis theae petch) 111 clonal resistance(The Tea Research Institute. Talawakele, 1969) Shanmuganathan, N.Item Recent developments in the control of poria root disease(The Tea Research Institute. Talawakele, 1964) Shanmuganathan, N.Item An experiment on the control of maintenance-leaf fall by certain sanitary measures(The Tea Research Institute. Talawakele, 1964) Shanmuganathan, N.; Redlich, W.W.Item The economica of Poria eradication(The Tea Research Institute. Talawakele, 1967) Shanmuganathan, N.Item Further observations on the oil spot disease of tea(The Tea Research Institute. Talawakele, 1963) Shanmuganathan, N.; Mulder, D.Item Studies on the parasitism and control of tea root disease fungi in Ceylon(The Tea Research Institute. Talawakele, 1969) Shanmuganathan, N.Item Diseases the enemies of tea(The Tea Research Institute. Talawakele, 1967) Shanmuganathan, N.Item Laboratory and greenhouse evaluation of some soil fumigants for toxicity against five root pathogens of tea(The Tea Research Institute. Talawakele, 1969) Shanmuganathan, N.; Fernando, S.R.A.