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K. Jayashree ¹, V. Shanmugam ¹, T. Raguchander ¹, A. Ramanathan ¹, R. Samiyappan ¹

Affiliations
1 Department of Plant Pathology, Tamil Nadu Agricultural University Coimbatore 641 003, Tamil Nadu, IN

Abstract

Pseudomonas fluorescens strain Pfl, effectively inhibited the mycelial growth of Macrophomina phaseolina, the pathogen causing dry ischolar_main-rot in blackgram and sesame. Application of Pf1 as seed treatment (10g / kg seed) followed by soil application (2.5 kg / ha) against ischolar_main rot effectively supported higher plant growth, better native Rhizobium nodulation and grain yield. Sclerotial number and ischolar_main rot incidence were also greatly reduced. The rhizosphere soil recorded a higher number of Pf I population.

Keywords

Biocontrol, Macrophomina phaseolina, Pseudomonas fluorescens. Root- Rot, Seed Treatment, Soil Application.

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A. Ramanathan ¹, D. Chandrasekharam ²

Affiliations
1 School of Earth Sciences, Kajamalai Campus, Bharathidasan University, Tiruchirapalli - 620 023, IN
2 Department of Earth Sciences, Indian Institute of Technology, Powai, Bombay - 400 076, IN

Abstract

Thennal springs of Rajapur and Puttur (Irde and Banduru) are of low-temperature and low-flow type. Though they are located at two different geological set up, they fall in Na-HCO₃ facies . The imprints of basalt - thermal water interaction at Rajapur and local equilibration of doleritic dyke with the thermal water of Irde is deduced. The reservoir of the Rajapur thermal spring is likely to be located in the Precambrian formations, as that of Puttur thermal springs and hence the chemical processes undergoing in these systems are similar. The reservoir temperatures estimated using chemical geothermometers are about 200°C and >120°C for the Puttur and Rajapur thermal springs respectively. Illite, K-mica. chlorite. kaolinite. Ca-montmorillonite and philipsite are the expected secondary minerals in the system.

Keywords

Hydrogeochemistry, Geothermics, Thermal Springs, Deccan Basalts, West Coast.

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Anuradha Patnaik , A. Ramanathan ¹

Affiliations
1 Department of Humanities and Social Sciences, Indian Institute of Technology, Powai, Mumbai 400 076, IN

Abstract

With the deregulation of interest rates in India, it is expected that the traditional channel of monetary transmission mechanism, which is tire interest rates channel will be revitalized. The present study examines the monetary policy transmission through the interest rates by analyzing the interest rates pass through within the spectrum of interest rates. In the process the pass through of the policy signal among select short term rates and long term rates was carried out, using Ordinary Least Square (OLS) approach. The results reveal that the transmission of a monetary policy signal is incomplete. It can be concluded that while some transmission of the monetary policy signal takes place in the short run, the policy impulses get lost in the long run.

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A. Ramanathan ¹

Affiliations
1 Pachaiyappa's College, Madras, IN

Abstract

In my paper on Maximal-Hausdorff spaces. I have proved the existence of non-bicompact maximal-Hausdorff spaces. The purpose of the present paper is to give a final and more satisfactory characterization of maximal-Hausdorff spaces by proving that the Maximal-Hausdorff spaces are identical with the H-closed semi-regular spaces. A part of this result has already been proved [see Paper I Theorems III and IV]. The known result that the Hausdorff bicompact spaces are maximal-Hausdorff is a special case of this result, since the Hausdorff bicompact spaces are H-closed semi-regular spaces.

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V. Gomathi ¹, A. Ramalakshmi ², A. Ramanathan ²

Affiliations
1 Department of Agricultural Microbiology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN
2 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore (T.N.), IN

Abstract

Fungus cultivating termites are important, highly specific insect microbe symbionts in Asia and Africa: The aim of this study was to determine physical, chemical and biological parameters of the fungus comb of Macrotermitinae collected from the different locations of Western Ghats of Tamil Nadu. The pH of the fungus comb was 4.4 to 4.8 and moisture content about 46.92 to 52.80%. The Carbohydrate: Lignin ratio of old combs varied between 1.55 to 2.08 (w/w) and C: L ratio of New comb varied between 0.6 to 0.86 (w/w). The nitrogen, phosphorus and potassium content of fungus comb varied from 0.75 to 1.8%, 0.175 to 0.193% and 0.075 to 0.08% on dry weight of fungus comb, respectively. The distribution of other fungi and also the symbiotic fungi Termitomyces in the nest of Macrotermitinae was also investigated in this study.

Keywords

Macrotermitinae, Fungus Comb, Microbial Population, Nutrient Content, Lignin Content.

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