4.Journals Published in Sri Lanka
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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 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.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.