Research Symposium-2011
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Browsing Research Symposium-2011 by Author "Abeysekara, N.N.R."
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Item Comparative Efficacy of Selected Insecticides in Comparison with Chlorpyrifos to Control Tobacco Cutworm (Spodoptera litura)(Uva Wellassa University of Srilanka, 2011) Weerawansha, A.N.R.; Abeysekara, N.N.R.; Ranawana, S.R.W.M.C.J.K.Cigarette tobacco production is done by the registered farmers of Ceylon Tobacco Company for a pre-trade agreement while other types are grown purely on freelance basis and hence cigarette tobacco production has a better accountability. It is a great matter of concern that, tobacco plant is susceptible for cutworm damage during its life cycle eventually making inconsistent production. It causes a considerable damage to the tobacco plant particularly in the vegetative growth. The cutworm damage is more severe in the field level and in many cases it is present in the nursery level too. The Ceylon Tobacco Company has clearly discovered the demerits of the prevailing pest and chemical control has been playing a leading role for a long period of time as it has become more successful in its efficacies. The company commonly uses Chlorpyrifos 40 EC, a broad spectrum contact insecticide, which belongs to the chemical group of Organophosphate. Direct application of organophosphate insecticides including Chlorpyrifos is toxic and causes environmental pollution. In the environment, the organophosphate insecticide residues and the degraded ingredients pollute the soil, water, air and food. These compounds harm not only non beneficial insects but also beneficial insects, beneficial soil organisms and other animals including human beings. Therefore, usage of Chlorpyrifos is supposed to be phased out from the tobacco cultivations in the island wide. The objective of this study was to find a possible alternative to Chlorpyrifos to reduce environmental toxicity.Item Effect of Different Nitrogen Fertilizer Levels on Development of Nicotine in Flue Cured Tobacco (Nicotiana tabaccum)(Uva Wellassa University of Srilanka, 2011) Chamil, R.M.C.; Abeysekara, N.N.R.; Ranawana, S.R.W.M.C.J.K.Note: See the PDF Version The tobacco plant is one of the very few crops entering world trade entirely on a leaf basis. It is the most widely grown commercial nonfood plant in the world (Akehurst, 1981). The botanical genus Nicotiana contains over sixty four species. Nicotiana tobaccum is the source of commercial tobacco, which is a member of the family Solanaceae and it is grown as an annual crop for its leaves. Tobacco is the common name of the plant Nicotiana tabacum and to a limited extent of Nicotiana rustica. Cigarette tobacco production in Sri Lanka is done by the registered farmers of Ceylon Tobacco Company for a pre-trade agreement. Nitrogen fertilizer plays a crucial role in tobacco production and large and quality production keenly depends on applied nitrogen fertilizer. However, existing nitrogen fertilizer levels have not fully met the yield forecasting and other cost compensating objectives. Therefore, this experiment was conducted to investigate the effect of nitrogen fertilizer level on the nicotine development of flue cured tobacco and to investigate the best application time of fertilizer on the vegetative growth of flue cured tobacco.Item Evaluation of the Adoption Behavior of Barn Automation Technology in Flue Cured Tobacco Industry in Sri Lanka(Uva Wellassa University of Srilanka, 2011) Perera, R.A.D.M.; Dharmadasa, R.A.P.I.S.; Abeysekara, N.N.R.Note: See the PDF Version Tobacco is a well-known profitable cash crop cultivated in different areas of Sri Lanka. Curing considered as the one of the major process in primary processing of tobacco. Curing of tobacco is done in barns. It was stated that stabilization of the barn in given temperature till end of each stage is extremely important to obtain desired characteristic. There are lots of drawbacks observed in manual barn controlling. To overcome these constraints after several years of successful experimentation one farmer introduced an automated furnace in year 2001. Introducing of an automated furnace was recognized as a revolutionary change by the experts of the tobacco industry. Therefore company expected to grater adoption rate with in a shorter period. Population of barn owners in flue cured tobacco industry is about nearly 2000 (BAT leaf system). However, the automated furnace has only adopted in 54 barns up to now. Therefore even after four years of implementation the expected progress in adoption to the technology has not met. Therefore this study was conducted to evaluate the different dimension of adoption behavior and identifying the determinants of non-adopter’s intention to use the automation technology.