Browsing by Author "Jayasuriya, K.E."
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Item Biocontrol of plant diseases - possible biocontrol approaches against white root disease of rubber(Rubber Research Institute. Agalawatta, 1996) Jayasuriya, K.E.Item Effect of rubber petiole cell walls and virulence of stains on secretion of pectic enzymes by Pytophthora meadii(2007) Jayasuriya, K.E.; Wijesundera, R.L.C.; Thennakoon, B.I.Item Environmental friendly disease control systems(Rubber Research Institute of Sri Lanka. Agalawatta, 1998) Jayasuriya, K.E.Item Factors affecting disease tolerance of rubber tree and research needs for developing disease-tolerant genotypes for the sustainability of rubber industry(Rubber Research Institute of Sri Lanka. Agalawatta, 2004) Jayasuriya, K.E.Item First report of Corynespora cassiicola on Codiaeum variegatum (Croton) in Sri Lanka(2007) Jayasuriya, K.E.; Thennakoon, B.I.Item Guide to identification and management of diseases and other disorders in rubber plantations of Sri Lanka(Rubber Research Institute of Sri Lanka. Agalawatta, 1998) Jayasuriya, K.E.; Jayasinghe, C.K.Item Impact of white root disease incidence on rubber intercropped with tea or cinnamon(Rubber Research Institute. Agalawatte, 2004) Jayasuriya, K.E.; Wettasinghe, D.S.Item In vitro antagonism caused by some species of fungi on Rigidoporus lignosus(Rubber Research Institute. Agalawatte, 1996) Jayasuriya, K.E.; Deacon, J.W.; Fernando, T.H.P.S.Fungi potentially antagonistic to rigidoporus lignosus were isolated from a) by placing soil samples on agar plates previously colonized by R.lignosus, or on trichoderma selective agar and b) from basidiomycete fruit bodies in rubber plantations.Modes of action of potential antagonists against R. lignosus were evaluated by in vitro methods viz: production of volatile or non-volatile inhibitory compounds and ability to overgrow colonies of R. lignosus an agar. Some trichoderma spp. were strongly antagonistic to R. lignosus in most of the tests. T. longibrachiatum (isolate DZE10) completely inhibited R. lignosus an agar by producing volatile inhibitory metabolites. Trametes sp. producing volatile inhibitory metabolites. Trametes sp. (isolates ISO16 KIR8) antagonized R. lignosus on dual membered plates.Item In vitro interactions between Rigidoporus lignosus, the case of white root disease of rubber and some potentially antagonistic fungi(Rubber Research Institute of Sri Lanka. Agalawatte, 1995) Jayasuriya, K.E.; Deacon, J.W.The modes of aaction of fungi potentially antagonistic against R. lignosus were assessed in vitro by studying their ability (a)to cause pre- or post-contact damage to R. lignosus hyphae in video taped interactions on thin purified water agar films and, (b) to displace the established pathogen from woody inocula. The most fungi were Trichoderma spp. which produced volatile or non-volatile inhibitors. Basidiomycetes such as Trametes sp. caused hyphal interface similar to that of Phlebiopsis gigantea, a commercial biocontrol agent of Heterobasidion annosum in pine stumps. species of Trametes and Aspergillus partially or completely displaced R. lignosus from previousley colonized woody inocula.Item Laboratory tests to assay responses of rubber (Hevea brasiliensis)genotypes to Phytophthora meadii(Rubber Research Institute. Agalawatta, 2009) Jayasuriya, K.E.; Wijesundera, R.L.C.Item Penta chloro phenol - effective and economical fungicide for the management of white root disease caused by Rigidoporus lignosus in Sri Lanka(Rubber Research Institute of Sri Lanka. Agalawatte, 1995) Jayasinghe, C.K.; Jayasuriya, K.E.; Fernando, T.H.P.S.Item Pesticides used in rubber cultivation and precautions on handling(Rubber Research Institute of Sri Lanka. Agalawatta, 2006) Jayasuriya, K.E.Item A possible role for 2-furaldehyde in the biological control of white root disease of rubber(Rubber Research Institute of Sri Lanka. Agalawatte, 1996) Jayasuriya, K.E.; Deacon, J.W.Different control methods were tested against rigidoporus lignosus mycelial cord growth in soil in highly artificial conditions. 0.2 per cent furfuraldehyde in malt extract agar caused 50 per cent inhibition of the growth of R. lignosus. Effect of soil fumigation with furfuraldehyde, addition of sterilized oat bran to soil and addition of spores of trichoderma strains to soil were evaluated. A 45 per cent inhibition of mycelial cord growth was achived by the addition of spores of trichoderma harizanum (strain TV 12b) along with sterilized oat bran as 0.5 per cent supplement to soil. Combination of treatments did not increase the inhibition than did either treatments alone. Different trichoderma species behaved differently in fumigated or unfumigated soil. Soil fumigation with furfuraldehyde enhanced growth of other fungal inhabitants simultaneously reducing R. lignosus growth.Item Role of plantation companies on managing white root disease(Rubber Research Institute. Agalawatte, 2004) Jayasuriya, K.E.; Fernando, E.B.; Pieris, P.Item Surveillance on Phytophthora ramorum, the cause of sudden oak death. a potential threat to rubber and upland flora in Sri Lanka(Forest Department :Battaramulla, 2005) Jayasuriya, K.E.Item Variability in defence responses of rubber genotypes against Phytophthora meadii infections(Rubber Research Institute. Agalawatta, 2005) Jayasuriya, K.E.; Wijesundera, R.L.C.Item Weakening effect of 2-furaldehyde on Rigidoporus lignosus the cause of white root disease of rubber(Rubber Research Institute of Sri Lanka. Agalawatte, 1996) Jayasuriya, K.E.; Deacon, J.W.; Fernando, T.H.P.S.Furfuraldehyde is recognized as a potential fumigant which has the ability to weaken rigidoporus lignosus in artificially or naturally infected rubber root inocula. Addition of sulphur to soil at 100 g per 75 Kg of soil, inactivated or prevented the formation of R. lignosus mycelial cords from artificially or naturally infected inocula. Drenching 2.4 per cent aqueous solution of furfuraldehyde in to soil (1 liter/75 Kg) where R. lignosus inocula were buried, caused weakening or inactivation of R. lignosus in artificially or naturally infected inocula. However, combination of two treatments had no ssynergistic effect on both types of R. lignosus inocula in soil.