Browsing by Author "Saraswathy, N."
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Item 'Anabe roga' of arecanut(Areca catechu L.)(2007-02-08) Prakasam, N.; Saraswathy, N.; Sampath Kumar, S.N.Item Application of nonparametric covariance analysis in field trial with reference to YLD management trial in arecanut(Indian Society for Plantation Crops, 2008-05) Jose, C.T.; Saraswathy, N.Item Biochemical changes during storage of arecanut [Areca catechu L.)(2007-02-08) Chempakam, B.; Saraswathy, N.Changes in biochemical constituents during storage of arecanuts were studied. Protein, fat, phenols, sugars and arecoline contents decreased significantly during storage. When whole dried nuts with husk were stored for one year, the contents of protein, fat, total phenols, reducing sugars and total sugars decreased to a lesser extent while a slight increase in ortho dihydroxy phenols and alkaloids was noticed as compared to dehusked nuts similarly stored.Item Colletotrichum gloeosporioides causing inflorescence dieback, button shedding and nut rot of betel nut palm(2007-02-08) Saraswathy, N.; Koti Reddy, M.; Radhakrishnan Nair, R.Item Disease problems in arecanut(2007-02-08) Saraswathy, N.; Prakasam, N.Item Disease surveillance on Koleroga of arecanut caused by Phytophthora arecae(2007-02-08) Anandaraj, M.; Saraswathy, N.Koleroga of arecanut occurs during south wast monsoon in all the areca growing areas where there is heavy rainfall, high humidity and a temperature range of 22-29°C. To study the correlation between the climatic factors and occurrence of the disease in different areas a proforma was evolved and the information was collected. The disease appeared 12-20 days after the onset of monsoon in different areas under favourable conditions. There was no indication to show that the disease spreads from one area to another.Item Diseases(1982-12) Rawther, T.S.S.; Radhakrishnan Nair, R.; Saraswathy, N.Item Diseases of arecanut(Malhotra Publishing House, 2007-02-08) Sampath Kumar, S.N.; Saraswathy, N.Item Diseases of arecanut in India - A review and further considerations(2007-02-08) Koti Reddy, M.; Saraswathy, N.; Chandra Mohanan, R.The major diseases affecting arecanut in India are: koleroga or mahali, anabe, yellow leaf disease, inflorescence die-back, and button shedding. Among the less serious diseases, the bud-rot, bacterial leaf stripe, stem breaking, seedling diseases, and infection of processed arecanuts, occurls at times in serious proportions in some places and cause considerable damage. Over 40 pathogenic and non-pathogenic forms have been recorded in India. The work done on them except the storage infections is reviewed here with suggestions for future lines of work.Item Effect of systemic fungicides on fruit rot of arecanut(2007-02-08) Anandaraj, M.; Saraswathy, N.Item Evaluation of certain fungicides against the die-back disease of areca inflorescence(2007-02) Saraswathy, N.; Koti Reddy, M.; Radhakrishnan Nair, R.Button shedding preceded by die-back of inflorescence is a severe problem in the areca plantations. Out of 13 fungicides tested in vitro, benomyl (0-1%), captan (0-25%), thiram (0-25%), and a phenyl mercury urea formulation (0 -1%) were highly fungicidal to the mycelial growth of Colleto-trichum gloeosporioides, the casual agent of the disease. Field trials carried out with -even fungicides showed that DMOC (0-1%), heptaene antibiotic (50ppm) + CuSO4 (50ppm), and Zineb (0-4%) in that order, were effective in controlling the malady.Item Evaluation of certain fungicides in soil against Ganoderma lucidum (Leys) Karst pathogenic on arecanut(2007-02) Koti Reddy, M.; Saraswathy, N.Item In Vitro Evaluation of Plant Extracts against Phytophthora Meadii Mcrae(2007-02) Saraswathy, N.The use of botanicals and other bioagents in the management of plant diseases is gaining importance. In the present study, acquous extracts of 20 plant species were tested against 20 isolates of Phytophthora meadll McRae causing fruit rot disease of areca palm. The plants commonly available In and around areca plantations were selected for this study. The extract was prepared macerating the plant tissue with equal quantity of distilled water and added in the basal medium of carrot agar to get 10 per cent concentration. The efficacy of different extracts was calculated based on the radial mycelial growth and sporangial production of the fungus. Among the tested plants, the extract of 'henna' {Lawsonla Inermls) and scared basil {Oclmum sanctum) caused maximum reduction In mycelial growth.The possibility of utilizing these plant extracts for control of soil population of Phytophthora species could be explored, especially where cocoa and black pepper are grown along with areca palms in the cropping system.Item MASS MULTIPLICATION OF TRICHODERMA HARZIANUM USING DIFFERENT ORGANIC WASTES FROM ARECA-COCOA CROPPING SYSTEM(2005) Zaheer Ahmed, B.; Kishor Kumar, K.; Saraswathy, N.Item Mycosis on tea mosquito helopeltis antoniis(1986) Sathiamma, B.; Saraswathy, N.Item Occurrence and activity of phosphate-solubilizing fungi from coconut plantation soils(2007-02) Shantaram, M.V.; Saraswathy, N.; George V. ThomasThe occurrence of phosphate-solubilizing fungi in coconut plantation soil types was investigated. The laterite, alluvial and clayey soils harboured more of the P-solubilizing fungi than the sandy soils. The isolated P-solubilizing fungi solubilized 26 to 74 per cent of the tri-calcium phosphate in 5 to 15 days. The competitive saprophytic ability of the active P-solubilizing I fungi in soil varied between the isolates. Eight fungi with high P-solubilizing capacity and high competitive saprophytic ability were recognised. They have better capacity to survive in soil and express their role in P-solubilization.Item Phenols and oxidase in the roots of healthy and Anabe affected arecanut palms(2007-02) Koti Reddy, M.; Saraswathy, N.; Sampath Kumar, S.N.Item Recycling of Arecanut Waste(1982) Saraswathy, N.Item Symptomatology and management of crown rot disease of arecanut palm (Areca catechu L.)(Indian Society for Plantation Crops, 2008) Saraswathy, N.Bud and crown rot diseases of arecanut palm (Areca catechu Linn.) are fatal diseases caused by Phytophthora meadii McRae. The pathogen could be isolated from the lesioned tissues of the bud, leaf sheath, developing inflorescence and internal tissues of the tender stem. Experiments were carried out using challenge inoculated one year old arecanut seedlings raised in polythene bags. Out of the three systemic fungicides, phosphorous acid (0.3%) was found superior to tridemorph and hexaconazole. Among the contact fungicides, propineb was found effective in checking the growth of P.meadii on arecanut seedlings. In a trial carried out at four different locations with phosphorous acid and tridemorph each at 0.3% conc. applied as soil drenching or as combination of soil drenching and spraying gave total control of the disease in adult palms when treated in the initial/middle stages of the disease.