4.Journals Published in Sri Lanka
Permanent URI for this communityhttps://dl.nsf.gov.lk/handle/1/6840
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Item Isolation and enumeration of microbial inhabitants of tea phylloplane(Tea Research Institute. Talawakele, 1994) Gunasekera, T.S.Item Pathological problems(Tea Research Institute. Thalawakele, 1951) Loos, C.A.Item Expression of plasmid-borne characters in Xanthomonas axonopodis pv.vignaeradiatae(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2000) Patro, T.S.S.K.; Jindal, J.K.Item Aetiology and control of black pepper (Piper nigrum L.) yellow mottle virus disease(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 1996) De Silva, D.P.P.; Jones, P.; Shaw, M.W.Item Synthesis, fungitoxicity and QSAR study of some new phosphorothionates(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2001) Chattapadhyay, T.K.Item Morphological and pathological variations of the fungus Colletotrichum gloeosporioides from different varieties of mango in Sri Lanka(Faculty of Agriculture, Eastern University. Chenkalady, 2001) Kajamuhan, A.; Daundasekera, D.M.A.K.; Bandara, J.M.R.S.Item Biocontrol of plant diseases - possible biocontrol approaches against white root disease of rubber(Rubber Research Institute. Agalawatta, 1996) Jayasuriya, K.E.Item South American leaf blight - an overview(Rubber Research Institute. Agalawatta, 1977) John, C.K.; Kadir, A.A.; Subramaniam, S.Item Studies on the variability and pathogenicity of Rigidoporus lignosus(Rubber Research Institute. Agalawatta, 1977) Liyanage, G.W.; Liyanage, A. De S.; Peries, O.S.; Halangoda, L.White root disease in Hevea, caused by the fungus Rididoporus lignosus (Fomes lignosus) occurs widely in Sri Lanka, In recent years, the severity of the disease has increased alarmingly. One of the factors that could be attributed to the increased incidence of the disease is the virulence of the pathogen. This paper report the results of laboratory experiments on the effects of pH, temperature, light and dark, and relative humidity on a number of isolates, obtained from sites located in different rubber growing areas. The fungus is able to grow over a wide range of temperature with maximum growth being recorded at 30ºC. All the isolates grew better when kept in continuous darkness except one isolate which grew equally well under both light and dark conditions. There was wide variability in the pH requirements for the growth of the fungus. The virulence of the different isolates was examined using healthy rubber roots under laboratory conditions and rubber seedlings in pot culture. The results show that there are differences in virulences and pathogenicity.Item The impact of ecological, cultural and biological factors on the strategy and costs of controlling root diseases in tropical plantation crops as exemplified by Hevea brasiliensis(Rubber Research Institute. Agalawatta, 1977) Fox, R.A.Profitability and the availability of financial, material and manpower resources are studied before starting a commercial enterprise; the longer its term, the more complex the studies. The costs of controlling plantation diseases ( in the tropics or leaf diseases), predictably annual (seasonally induced, juvenil leaf), or perennial (root diseases). Especially in the case of root diseases, the pattern of investment, and hence profitabillity, can be affected by the choice of control measures and their timing, factors which must be evaluated by plant pathologists. These factors are examined in general term and with particular reference to effects on them of some aspects of the ecological, cultural and biological control of major root disease pathologens of some tropical plantation crops, Armillariella (Armillaria) mellea, Ganoderma philippii (pseudoferreum), Phellinus (Fomes) noxius, and Rigidoporus (Fomes) lignosus.