scholarly journals Occurrence of a Pterygoplichthys disjunctivus (Weber, 1991) population in Cauvery River System, Tamil Nadu, South India

2016 ◽  
Vol 8 (6) ◽  
pp. 62-66 ◽  
Author(s):  
Meena Moorthy ◽  
Sundaramanickam Arumugam ◽  
Thankappan Ajith Kumar Thipramalai
Keyword(s):  
Tamil Nadu ◽  
South India ◽  
River System ◽  
Cauvery River

A scarcity value based explanation of trans-boundary water disputes: the case of the Cauvery River Basin in India

Water Policy ◽  
2009 ◽  
Vol 11 (2) ◽  
pp. 141-167 ◽  
Author(s):  
Nilanjan Ghosh ◽  
Jayanta Bandyopadhyay
Keyword(s):  
River Basin ◽  
Water Use ◽  
Water Availability ◽  
Tamil Nadu ◽  
South India ◽  
Historical Data ◽  
Economic Instruments ◽  
Cauvery River ◽  
Cauvery River Basin ◽  
Paddy Cultivation

The paper is an attempt to interpret trans-boundary water disputes with the help of scarcity value, which is the value that could have been generated if the limit on water availability could be relaxed by one unit. Scarcity value measures the degree of deprivation and creates the basis for disputes. This hypothesis has been applied in this paper to the disputes over water use for irrigation in the Cauvery basin between the states of Karnataka and Tamil Nadu in South India. On the basis of the historical data for the area under paddy cultivation in the two states, the paper shows that such disputes are not clearly based on physical scarcity of water but are a temporal coincidence of demand based on scarcity value. This means that enhanced supply would not be the correct approach to the resolution of disputes. New economic instruments based on scarcity value may provide a more objective picture of the disputes and hence help in their amicable resolution.

scholarly journals Lecanicillium lecanii (Zimmermann) Zare & Gams, as an efficient biocontrol agent of tea thrips, Scirtothrips bispinosus Bagnall (Thysanoptera: Thripidae)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Mariappan Sankara Rama Subramaniam ◽  
Azariah Babu ◽  
Bhabesh Deka
Keyword(s):  
Tamil Nadu ◽  
South India ◽  
Biocontrol Agent ◽  
Uv Light ◽  
Biological Control Agents ◽  
Optimum Conditions ◽  
Lecanicillium Lecanii ◽  
Wettable Powder ◽  
Label Claim ◽  
Yeast Powder

Abstract Background Continuous and non-judicial application of synthetic insecticides to control the tea thrips, Scirtothrips bispinosus (Bagnall), one of the major tea pests in South India has led to certain undesirable issues in the ecosystem besides the presence of the pesticide residues in manufactured tea. Biological control agents are of immense importance in tea cultivation. The present study was designed to isolate Lecanicillium lecanii (Zimmermann) Zare & Gama from the field-collected cadavers of the insects/mites infected by fungi of tea growing areas of Anamallais (Tamil Nadu, South India), and to evaluate their field bio-efficacy against the tea thrips. Results Lecanicillium lecanii isolated from the tea ecosystem had been formulated into a wettable powder (WP) formulation and evaluated against tea thrips under both laboratory and field conditions. Among the several media evaluated, the PDAY (Potato Dextrose Agar + 1% Yeast powder) was found to be the best suitable medium for the growth and germination of spores. Optimum conditions for the growth of L. lecanii were found in PDAY medium at the pH 6-7, temperature 25-30°C and 90-95% RH. Exposure to UV light for more than 30 min significantly inhibited the growth of the fungus. Lecanicillium lecanii at (1 × 107 spore/ha) was found significantly effective against thrips. Fungal development index (FDI) of L. lecanii + jaggery significantly differed than other treatments. Lecanicillium lecanii at 1500g (1×107 conidia/ml) mixed in 400 l of water was effective against the tea thrips. Addition of equal amount of jaggery with L. lecanii wettable powder in the tank mixture could increase the efficacy of the mycopesticide against tea thrips. Conclusion The powder formulation of L. lecanii was found safer to natural enemies present in the tea ecosystem. After fulfilling the requirements for its registration and label claim on tea, this strain of L. lecanii could be commercialized for the benefit of the tea industry for the management of tea thrips in an eco-friendly manner.

Representing Disasters and Long-term Recovery – Insights from Tamil Nadu

2021 ◽  
Author(s):  
Chandni Singh ◽  
Mark Tebboth ◽  
Jasmitha Arvind ◽  
Yashodara Udupa
Keyword(s):  
Tamil Nadu ◽  
Shape Recovery ◽  
South India ◽  
State Policies ◽  
Indian Ocean Tsunami ◽  
Recovery Processes ◽  
Disaster Impacts ◽  
Chennai City ◽  
Post Disaster

This study focuses on disaster impacts and recovery in Tamil Nadu, drawing on insights from Chennai city and Nagapattinam district. The research is part of a larger three-year project called “Recovery with Dignity”, which examines the experiences of recovery in post-disaster situations across three states in India – Odisha, Tamil Nadu, and Kerala – and explores how recovery processes represent vulnerable populations. In this report, we focus on three key disasters in Tamil Nadu: the 2004 Indian Ocean Tsunami, the 2015 South India flood, and the 2018 Cyclone Gaja. Through these events, we examine how the ways disasters and their losses are represented shape recovery outcomes. The study uses a range of data, from a review of state policies in Tamil Nadu (2005-2019), an analysis of media articles published in English and Tamil (2004-2019), to interviews with disaster-affected people and secondary stakeholders. The findings indicate that disaster responses and outcomes are highly differentiated based on how disaster-affected people and their needs and losses are represented. To enable inclusive recovery, it is necessary to recognising the heterogenous nature of disaster impacts and acknowledge different ideas of what recovery means.

Length-weight relationships for fish species from Cauvery River at Hogenakal in South India

2010 ◽  
Vol 27 (3) ◽  
pp. 968-969 ◽  
Author(s):  
M. Muralidharan ◽  
M. Arunachalam ◽  
M. Raja
Keyword(s):  
Fish Species ◽  
South India ◽  
Cauvery River
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