Browsing by Author "Samraj, J"

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    Deterioration of copra by fungi
    (Kerala Agricultural University, 1980) Unnikrishnan Nair, P K; Samraj, J; Wilson, K I
    Fungi Aspergiltus niger, Aspergiltus sp., Penicillum sp., Rhizopus, sp., Diplodia sp. and Trichoderma sp. were isolated from copra samples. These fungi grew on copra and caused reduction in oil content under artificial inoculation Except Rhizopus sp. all the organisms grew well in Richard's solution containing coconut oil as carbon source. Trichoderma sp. has not been reported on copra so far.
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    Morphological & Physiological studies on Helminthosporium halodes Drechs. The 'Leaf Rot' fungus of coconut
    (Division of Plant Pathology, Agricultural College and Research Institute, Vellayani, 1963) Shanmughom, S N; Samraj, J
    The strain of Helminthosporium halodes occuring in Kerala and causing leaf rot disease of the coconut palm was found to differ in certain respects from the type species and also from its known varieties. The dimmensions of the spores of this were far superior to that of others which were reported as H.halodes or as its varieties. The difference were very prominent in culture. Formation of secondary spores on definite secondary sporophores, proliferated from the primary spores occurs only in the coconut strain not in the type species or its varieties . The fungus is therefore considered as a new variety of H.halodes var nucifera var. nov.
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    Studies on the seasonal and diurnal periodicity of Pyricularia oryzae cav. Codidia in the air over rice crop
    (Kerala Agricultural University, 1975) Bhavani Devi, S; Balagopal, C; Samraj, J
    Air spore over rice crop was studied during three seasons using Hirst's spore trap, A definite pattern of seasonal and diurnal periodicity of occurrence was noted in the case of Pyricularia oryzae. The conidia load of Pyricularia oryzae was highest during November and December while it was comparatively lower during other months. Conidia of Pyricularia orysae showed a night maxima throughout the period of study, the highest load occurring arround 01.00 to 05.00 hours.