Browsing by Author "Rachel Samuel"

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    Effect of VAM, Glomus mosseae on nematodes infesting banana under coconut based high density multispecies cropping system
    (1998) Sosamma, V.K.; Koshy, P.K.; Rachel Samuel
    Vesicular Arbuscular mycorrhizal fungus, Glomus mosseae was found effective in reducing the nematode populations especially that of Meloidogyne incognita and Radopholus similis infesting banana besides enhancing growth and bunch weight under field conditions. There was 18 per cent increase in height, 2.5 per cent increase in the number of leaves, 30.7 per cent increase in leaf area, 35.7 per cent increase in bunch weight, 30 per cent increase in this number of hands, 39.6 per cent increase in number of fingers and 30.1 per cent increase in shoot weight in the mycorrhizae colonised plants when compared to that of control banana plants in the field
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    Effect of VAM, Glomus mosseae on nematodes infesting banana under coconut based high density multispecies cropping system
    (2007-02-08) Sosamma, V.K.; Koshy, P.K.; Rachel Samuel
    Vesicular Arbuscular mycorrhizal fungus, Glomus mosseae was found effective in reducing the nematode populations especially that of Meloidogyne incognita and Radopholus similis infesting banana besides enhancing growth and bunch weight under field conditions. There was 18 per cent increase in height, 2.5 per cent increase in the number of leaves, 30.7 per cent increase in leaf area, 35.7 per cent increase in bunch weight, 30 per cent increase in this number of hands, 39.6 per cent increase in number of fingers and 30.1 per cent increase in shoot weight in the mycorrhizae colonised plants when compared to that of control banana plants in the field.
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    Interaction between Vasicular Arbuscular Micorrhizae (VAM) and burrowing nematodes on coconut
    (Central Plantation Crops Research Institute, Regional station, Kayangulam, 1993-09-04) Sosamma Varghese, K.; Koshy, P.K.; Rachel Samuel; Bindu S. Menon; Sobha, A.T.
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    Interaction of Arbuscular Mycorrhizal Fungi (Amf) Isolated from Healthy High Yielding Coconut Palms with Burrowing Nematode, Radopholus Similis on Coconut
    (2007-02) Sosamma, V.K.; Koshy, P.K.; Rachel Samuel; Bindu, S.M.
    An experiment was conducted under greenhouse conditions to find out the most effective mycorrhizal fungi suppressing Radopholus similis multiplication on coconut. The mycorrhizal isolates used were Acaulospora bireticulata, Scutellospora coralloidea. Glomus macrocarpum and Sclerocystis rubiformis. Among the different mycorrhizae inoculated individually, A. bireticulata supported maximum plant growth. The minimum growth characters and maximum multiplication of nematodes were recorded in plants that were inoculated with R. similis alone. On combined inoculation of mycorrhizae and R. similis, the maximum growth was recorded in plant inoculated with A. bireticulata. The mycorrhiza, A. bireticulata was found to multiply maximum on coconut compared to G. macrocarpum, Scutellospora coralloidea and S. rubiformis in nematode free as well as nematode inoculated plants. Nematode population was also lowest in plants inoculated with A. bireticulata.
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    Interaction of Arbuscular Mycorrhizal Fungi (AMF) Isolated From Healthy High Yielding Coconut Palms with Burrowing Nematode, Radopholus Similis on Coconut
    (1998) Sosamma, V.K.; Koshy, P.K.; Rachel Samuel; Bindu, S.M.
    An experiment was conducted under greenhouse conditions to find out the most effective mycorrhizal fungi suppressing Radopholus similis multiplication on coconut. The mycorrhizal isolates used were Acaulospora bireticulata, Scutellospora coralloidea. Glomus macrocarpum and Sclerocystis rubiformis. Among the different mycorrhizae inoculated individually, A. bireticulata supported maximum plant growth. The minimum growth characters and maximum multiplication of nematodes were recorded in plants that were inoculated with R. similis alone. On combined inoculation of mycorrhizae and R. similis, the maximum growth was recorded in plant inoculated with A. bireticulata. The mycorrhiza, A. bireticulata was found to multiply maximum on coconut compared to G. macrocarpum, Scutellospora coralloidea and S. rubiformis in nematode free as well as nematode inoculated plants. Nematode population was also lowest in plants inoculated with A. bireticulata.
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    Interactive Effect of Vesicular Arbuscular Mycorrhizae (VAM) With Radopholus Similis on Coconut Seedlings.
    (1998) Koshy, P.K.; Sosamma, V.K.; Rachel Samuel
    Significant increase in lamina width and leaf area was recorded in plants that received mycorrhizae alone. Plants inoculated with nematodes alone showed maximum reduction in growth, fresh shoot and root weights which proves the pathogenic effect of R. similis on coconut seedlings. Increase in shoot weight, root weight and decrease in lesion indices was noticed in plants inoculated with mycorrhizae prior to nematode. Prior inoculation of VAM was found to be more effective against R. similis than simultaneous inoculation of VAM and nematode. Eventhough root infection and spore production of VAM was slightly reduced in nematode inoculated plants, the lesion index and root nematode population could be successfully lowered with mycorrhiza infection. A mixture of VAM consisting of multiple endophytes viz. Acaulospora bireticulata, Glomus fasciculatum, G. macrocarpum, G. mosseae, G. versiforme, Sclerocystis rubiformis and Scutellospora nigra was found effective in improving the plant growth and reducing the R.similis population infesting coconut seedlings.
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    Interactive Effect of Vesicular Arbuscular Mycorrhizae (Vam) with Radopholus Similis on Coconut Seedlings.
    (2007-02) Koshy, P.K.; Sosamma, V.K.; Rachel Samuel
    Significant increase in lamina width and leaf area was recorded in plants that received mycorrhizae alone. Plants inoculated with nematodes alone showed maximum reduction in growth, fresh shoot and root weights which proves the pathogenic effect of R. similis on coconut seedlings. Increase in shoot weight, root weight and decrease in lesion indices was noticed in plants inoculated with mycorrhizae prior to nematode. Prior inoculation of VAM was found to be more effective against R. similis than simultaneous inoculation of VAM and nematode. Eventhough root infection and spore production of VAM was slightly reduced in nematode inoculated plants, the lesion index and root nematode population could be successfully lowered with mycorrhiza infection. A mixture of VAM consisting of multiple endophytes viz. Acaulospora bireticulata, Glomus fasciculatum, G. macrocarpum, G. mosseae, G. versiforme, Sclerocystis rubiformis and Scutellospora nigra was found effective in improving the plant growth and reducing the R.similis population infesting coconut seedlings.
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    Nematode Diseases of Coconut
    (2007-02) Koshy, P.K.; Rachel Samuel
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    Standardisation Of Sampling Zone And Type Of Root For Arbuscular Mycorrohizal Fungal Estimatlon On Coconut
    (2000) Koshy, P.K.; Sosamma, V.K.; Rachel Samuel
    Root and soil samples collected from varying distance and depths in the rhizosphere of five elite coconut palms were processed for arbuscular mycorrhizal fungal (AMF) population estimation. Samples were collected every month for a period of one year. Maximum number of resting spores of AMF were recovered at a distance of one meter away from the bole of the coconut palm within a depth of 26 to I00 cm from the soil surface. All type of roots of coconut palm harboured AMF. However, maximum colonization was noticed in the fine yellowish brown to light brown tertiary roots of coconut.