Browsing by Author "Paily, P V"

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    Bacterial wilt of cassava (Manihot esculento crantz.) in Kerala
    (Kerala Agricultural University, 1975) Paily, P V; Rema devi, L; Menon, M R
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    Effect of fungicides and silica in the control of sheath blight disease of rice caused by Corticium Sasakii (Shiriai)
    (Kerala Agricultural University, 1981) Mathai, G; Paily, P V; Menon, M R
    Results of field experiments conducted at Vellayani, Kerala during 1974 indicated that Hinosan was significantly superior in reducing sheath blight disease intensity and in increasing the yield of rice due to better disease control. Application of silioa (250 and 500 kg/ha) had significant effect in reducting the disease intensity on the 75th day of sowing. Crude silica content in the plant was high at the 40th and 80th day of sowing but was low on the 60th day. Positive correlation was observed between the amount of applied silica and the crude silica content of plant.
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    Observation on the aerial application of an oil based fungicide against the leaf rot disease of the coconut palm
    (Kerala Agricultural University, Vellanikara, 1966) Sam Raj, J; Paily, P V; Abi, Cheeran
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    Physiology of parasitism of Pythium Aphanidermatum (Edson) fitz. inciting soft-rot of ginger(Zingiber officinale rose)
    (Kerala Agricultural University, 1982) Indrasenan, G; Paily, P V
    A study on production of pectic enzymes in five liquid media was made. Pythium aphanidermatum (Edson) Fitz. was found capable of elaborating various pectic enzymes in vitro and in vivo, Estimation of pectic enzymes like pectin methyl esterase (PME), exopolygalacturonase (Exo-PG), endopolygalacturonase (Endo-PG) polygalacturonase transeliminase (PGTE) and macerating activity on potato discs were done in five liquid media on four different days and observed that the rate of production of these enzymes by P. aphanidermatum varied with different media and age of the culture, the maximum production being noted in Conn's medium on the 3rd day. P.aphanidetmatum(Edson)Fitz. was found to produce various pectic enzymes as judged by the in vitro and in vivo studies which play a predominant role in bringing about the tissue degradation and the eventual pathogenesis on the host.
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    Studies on the effect of fungicides and silica in the control of sheath blight of rice caused by Corticium Sasakii (Shirai) Matsumoto
    (Division of Plant Pathology, College of Agriculture, Vellayani, 1975) Mathai, G; Paily, P V
    A field experiment to determine the effect of two fungicides under three levels of silica on the incidence and intensity of sheath blight of rice was conducted at the Agricultural College Farm, Vellayani during the crop season February to May 1974. The fungicides, hinosan and dithane M-45, were effective in reducing the intensity, per cent infection and rate of spread of the disease and thereby increasing the yield. Among the fungicides tried hinosan was significantly superior. Application of silica was found to have significant effect in reducing the intensity of the disease on the 75th day. However, the per cent infection, rate of spread and the intensity on the 85th day indicated that the effect of silica in imparting resistance to infection by the pathogen was not significant.
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    Studies on the grey leaf blight disease of Coconut palm caused by Pestalotia palmarum Cooke.
    (Department of Plant Pathology, College of Agriculture, Vellayani, 1977) Francis, A J; Paily, P V
    An investigation was carried out in the palms at the Coconut Research Station, Balaramapuram during the months of May, June, July, August and September of 1976 to study the influence of different nutrients on the intensity of disease caused by Pestalotia palmarum. The experiment was conducted on the palms which were treated with different combinations of NPK in a 3 confounded factorial design . Morphological characters of different species of Pestalotia were also studied along with this investigation. Highest degree of infection was noticed in the month of June and the lowest in September. Higher disease intensity was noted in the palms which were treated with 1 level of nitrogen, 2 levels of phosphorus and 2 levels of potassium than in these that were treated with 0 level of nitrogen, 1 level of phosphorus and 0 level of potassium.
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    Studies on the leaf spot and post harvest diseases of banana, and their control
    (Department of Plant Pathology, College of Agriculture, Vellayani, 1977) Suharban, M; Paily, P V
    Varietal susceptibility of different cultivars to the leaf spot diseases of banana was studied in an existing plantation, consisting of 18 varieties in the Instructional Farm, Vellayani. It was found that Robusta and Chakkarakeli were the most susceptible while Venattumonthan and Mass being the least susceptible. Different types of leaf spots viz., Cordana leaf spot, Deightoniella leaf spot, Helminthosporium leaf spot, Septoria leaf spot and Cercospora leaf spot were studied, and the fungi associated with them were also isolated, Growth and sporulation of all these fungi were studied in different media. Power oil was observed to be the best fungicide eventhough there was no significant difference between power oil, Difolatan and Bavistin in the fungicidal control of leaf spot diseases. It was found that carbondioxide does not have any role in enhancing the keeping quality. Both partial filling and complete filling of the gas were seem to enhance deterioration. When higher concentrations of benomyl were tried it was found that 600 ppm was superior to all other treatmentsIn 500 gauge polythene bags. Eventhough different fungicides like Bordeaux mixture, benomyl and lime water were tried in different gauges of polythene bags viz., 150, 200, 250, 300, 350, 400, 450 and 500, 600 ppm benonyl in 200 gauge polythene bags was found to be the best in preserving the fruits followed by lime water, and Bordeaux mixture
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    Studies on the pathogenicity and physiology of Cornespora cassiicola (Berk & Curt.) Wei.
    (Division of plant Pathology ,Agricultural College and Research Institute ,Vellayani, Trivandrum, 1970) George, P V; Paily, P V
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    Studies on the soft rot of ginger (Zingiber officinale rose) caused by Pythium aphanidermatum (Edson) Fitz.
    (Kerala Agricultural University, 1973) Indrasenan, G; Paily, P V
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    Symptomatology and etiology of bacterial blight of cassava (Manihot Esculenta Crantz)
    (Kerala Agricultural University, 1981) Raveendran Nair, R; Paily, P V; Menon, M R
    The bacterial blight of cassava was observed in Trivandrum, Kerala, during 1975 and since then its sporadic incidence was reported form other regions also. The symptoms manifested as blighting of leaves, defoliation, die-back, necrosis of stem, decay of roots (tubers) and wilting of plants. The causative bacterium was isolated and its pathogenicity established by artificial inoculation. Based on the morphological, physiological and biochemical characters of the bacterium and the symptoms produced by it, the pathogen causing the blight of cassava was identified as Xanthomonas manihotis fArthaud-Berthet) Starr.