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19773
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Subject: Plant Pathology × Author: KAU × End date: 1977 × Start date: 1977 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Studies on the control of bacterial wilt of tomato with reference to organic soil amendments and chemicals
    (Department of Plant Pathology, College of Agriculture, Vellayani, 1977) Jayaprakash, M G; KAU; Rajan, K M
    The pot culture and field experiments were conducted to assess the effort of organic soil amendments and chemicals on the incidence of bacterial wilt of tomato. The population dynamics in relation to the causal organism, total fungi, bacteria and actinomycetes were also studied. Theresult of the investigation revealed that organic materials did not chook the disease incidence to a satisfactory level . However , the application of organic material followed by the treatment with chlorotomycin and streptocycline gave a satisfactory control of the disease.
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    ThesisItemOpen Access
    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; KAU; 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; KAU; 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