Browsing by Author "Ramanatha Menon, M"
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Item Additional host of Botryodiplodia theobromae pat(Kerala Agricultural University, 1975) Susamma Philip; Ramanatha Menon, MItem Alternaria blight of canna indica L.(Kerala Agricultural University, 1975) Rema Devi, L; Ramanatha Menon, M; Ramakrishnan, C KItem Comparative efficacy of certain fungicides in the control of sheath rot of rice(Kerala Agricultural University, 1981) Chinnaswamy, R; Chandrasekharan Nair, M; Ramanatha Menon, MItem Different tuber/rhizome as substitute for potato in the fungal culture medium(Kerala Agricultural University, 1975) Ramakrishnan, C K; Rema Devi, L; Ramanatha Menon, MItem Diplodia rot of Dolichos lab-lab L.(Kerala Agricultural University, 1974) Susamma Philip; Ramanatha Menon, MItem Effect of fungicidal pre-storage treatments on viability of paddy seeds(Kerala Agricultural University, 1970) Rema Devi, L; Ramanatha Menon, MItem Effect of fungicidal treatments on the germination and microflora of sunflower seeds(Kerala Agricultural University, 1976) John Abraham, K; Ramanatha Menon, M; Chandrasekharan Nair, MItem Effect of organic soil amendments on plant growth and intensity of sheath blight of rice(Kerala Agricultural University, 1975) Rajan, K M; Ramanatha Menon, MItem Investigations on the control of the banana aphid Pentalonia nigronervosa Coq.(Kerala Agricultural University, Vellanikara, 1966) Ramanatha Menon, M; Christudas, S PItem Investigations on the microbial deterioration of copra(Department of Plant Pathology, College of Agriculture, Vellayani, 1978) Susamma Philip; Ramanatha Menon, MItem Leaf blight of Coccinia indica Wight & Am. caused by Corynespora cassiicola (Berk. & Curt) Wei.(Kerala Agricultural University, 1972) Susamma Philip; Ramakrishnan, C K; Ramanatha Menon, MItem Microflora associated with sunflower seeds(Kerala Agricultural University, 1976) John Abraham, K; Ramanatha Menon, M; Chandrasekharan Nair, MItem Mosaic disease of horsegram (dolichos biflorus L.)(Kerala Agricultural University, 1977) Sukumara Dev, V P; Samaraj, J; Ramanatha Menon, MItem Movement of banana bunchy top virus in the plant(Kerala Agricultural University, 1970) Sam Raj, J; Ramanatha Menon, M; Christudas, S PItem Studies on the mosaic disease of snake gourd (Trichosanthes Anguina L.)(Kerala Agricultural University, 1978) Joseph, P J; Ramanatha Menon, MThe symptom of snake gourd mosaic disease manifested as mosaic pattern with dark green raised blisters on the leaf lamina. The size of leaves severely reduced ; internodes shortened and the growth of the plant is retarded. The infected plants blossom sparingly and set few fruits. The virus is sap and insect transmissible; both Aphis gossypii and A cracdvora transmitted the virus. Studies on the vector-virus relationships with A. cracdvora showed that the vector could acquire the virus with 5 minutes acquisiton feeding and transmit it with 5 minutes feeding on a healthy test plant. A minimum of 5 aphids are required for transmission and pre-acquisition starvation increased the efficiency whereas pre-infection starvation beyond 30 minutes ^uucod it. The vector could met retain the virus for long periods and the relationship was of non-persistent nature. The physical properties of the virus are: T.!. P. of 70 -75°C, D.E.P. ,of 1 '.5000-1 :1 0000, longevity in vitro of 72-96 hours at room temperature and 144—168 hours at "lOt). Eight species of plants in 3 families ^c susceptible to infection by the virus. Based on the above characteristics, the virus causing mosaic disease of snake gourd in Kerala is identified as a strain of ucumis virus 1 .Item Studies on the mosaic disease of snake gourd (Trichosanthes anguina L.)(Department of Plant Pathology, College of Agriculture, Vellayani, 1978) Joseph, P J; Ramanatha Menon, MA mosaic disease of snake gourd (Trichosanthes anguina L.) caused by a virus, was investigated which was prevalent at Vellayani and nearby localities. The symptoms manifested as mosaic and formation of dark green blisters on the lamina was also observed. The affected leaves were severely reduced in size, variously crinkled and malformed. Growth was retarded and internods were shortened. The infected plants blossom sparingly and set only very few fruits. The affected portions of the leaf were thinner than healthy areas, palisade cells reduced in size and loossly packed. The mesophyll cells contain only few chloroplasts.Item Studies on the population of the aphid Pentalonia nigronervosa Coq. on banana plants in Kerala(Kerala Agricultural University, Vellanikara, 1967) Ramanatha Menon, M; Christudas, S PItem Suitability of different media for the estimation of Pseudomonas Solanacearum from soil(Kerala Agricultural University, 1980) Rema Devi, L; Ramanatha Menon, MItem Varietal susceptibility of rice to infection by Conidum sasakii and its host range(Kerala Agricultural University, 1973) Mahendra Prabhatu, C A; Ramanatha Menon, M; Rema Devi, I; Ramakrishnan, C KItem Viability of sclerotia of Corticium sasakii (Shirai) matsumoto(Kerala Agricultural University, 1974) Mahendra Prabhat, C A; Ramanatha Menon, M; Rema Devi, L; Ramakrishnan, C K