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Singh, M.
- Cannabis sativa (Cannabaceae) in Ancient Clay Plaster of Ellora Caves, India
Abstract Views :229 |
PDF Views:86
Authors
M. Singh
1,
M. M. Sardesai
2
Affiliations
1 Archaeological Survey of India, Science Branch, Western Zone, Aurangabad 431 004, IN
2 Department of Botany, Dr Babasaheb Ambedkar Marathwada University, Aurangabad 431 004, IN
1 Archaeological Survey of India, Science Branch, Western Zone, Aurangabad 431 004, IN
2 Department of Botany, Dr Babasaheb Ambedkar Marathwada University, Aurangabad 431 004, IN
Source
Current Science, Vol 110, No 5 (2016), Pagination: 884-891Abstract
The present research trend is to explore sustainable construction materials having least environmental impact that also encapsulate in terms of our natural resources. The present communication discusses the use of raw hemp as an organic additive in the clay plaster of the 6th century AD Buddhist Caves of Ellora, a World Heritage Site. Cannabis sativa L. admixed in the clay plaster has been identified using scanning electron microscope, Fourier transform infrared spectroscopy and stereomicroscopic studies and the results are compared with fresh specimens. The study indicates that many valuable properties of hemp were known to the ancient Indians in the 6th century AD.Keywords
Ancient Caves, Cannabis sativa, Clay Plaster, World Heritage Site.Full Text
- Tea Mosquito Bug (Helopeltis theivora) and Mealy Bug (Paraputo theaecola)-New Threats to Large Cardamom
Abstract Views :334 |
PDF Views:82
Authors
Affiliations
1 ICAR-Research Complex for NEH Region, Sikkim Centre, Tadong 737 102, IN
1 ICAR-Research Complex for NEH Region, Sikkim Centre, Tadong 737 102, IN
Source
Current Science, Vol 110, No 8 (2016), Pagination: 1390-1391Abstract
Large cardamom (Amomum subulatum), a member of the family Zingiberaceae under order Scitaminae, is the most important cash crop in the eastern Himalayan region including Sikkim and the Darjeeling hills in India, the eastern part of Nepal and southern Bhutan.Full Text
- Does Pestalotiopsis royenae Cause Leaf Streak of Large Cardamom?
Abstract Views :253 |
PDF Views:95
Authors
Affiliations
1 ICAR-National Organic Farming Research Institute, (Formerly ICAR Research Complex for NEH Region, Sikkim Centre), Tadong, Gangtok 737 102, IN
1 ICAR-National Organic Farming Research Institute, (Formerly ICAR Research Complex for NEH Region, Sikkim Centre), Tadong, Gangtok 737 102, IN
Source
Current Science, Vol 114, No 10 (2018), Pagination: 2155-2160Abstract
Leaf streak caused by Pestalotiopsis royenae (Guba) Steyaert has been reported as a new disease of large cardamom (Amomum subulatum). It is characterized by rectangular spots running parallel to the veins. P. royenae was isolated onto potato dextrose agar from the infected portion of the plant. In the pathogenicity test, disease symptoms were not present on inoculated plant and on detached leaf in vitro after 20 days. During 2014–2016, a survey in various large cardamom plantations of Sikkim revealed the presence of tea mosquito bugs on the infected parts of A. subulatum. The spots did not show any growth. Different sized spots have been noticed on the infected leaf produced by different instars. At the initial stage, these symptoms appear on the young and tender leaves of large cardamom. Tea mosquito bugs were collected from the infested leaves and allowed to feed under controlled conditions, which produced similar type of leaf streak symptoms in large cardamom and also in other non-host crops like maize and turmeric. The results reveal that the cause of leaf streak is due to feeding injury of tea mosquito bugs and rule out P. royenae as a pathogen causing leaf streak disease symptoms. Pestalotiopsis sp. was also isolated as endophyte from large cardamom.Keywords
Helopeltis theivora, Large Cardamom, Leaf Streak, Pestalotiopsis royenae.Full Text
References
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- Kalita, H., Avasthe, R. K., Gopi, R., Yadav, A. and Singh, M., Tea mosquito bug (Helopeltis theivora) and mealy bug (Paraputo theaecola) – new threats to large cardamom. Curr. Sci., 2016, 110, 1390–1391.
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- Urease Activity and Deposition of Calcium Carbonate Layers on a 16th Century Mughal Monument
Abstract Views :244 |
PDF Views:71
Authors
M. Singh
1
Affiliations
1 National Museum Institute, Department of Conservation, Janpath, New Delhi 110 011, IN
1 National Museum Institute, Department of Conservation, Janpath, New Delhi 110 011, IN
Source
Current Science, Vol 116, No 11 (2019), Pagination: 1840-1849Abstract
In the present study, bacterial populations capable of re-precipitating calcium carbonate were isolated from the exterior oozed-out calcite deposition of Salabat Khan Tomb, a 16th-century Mughal monument in western India. The deposits were analysed for identification of the materials that led to microbial induced calcite precipitation (MICP) on the surface of the monument. Quantification of MICP by XRD and visualization by SEM showed direct involvement of these isolates in the precipitation of calcium carbonate. FTIR spectra showed clear peaks for calcite along with a peak of methane probably due to dead bacterial cells. Preliminary examination, isolation and partial sequencing of 16S rRNA gene showed that the major microbial population participating in calcite precipitation is heterotrophic and includes mainly Bacillus sp., Arthobacter sp., Agromyces indicus and Aquamicrobium sp. In future, the process may be applied for the conservation of many limestone/ marble monuments using MICP in India and elsewhere.Keywords
Ancient Monuments, Bacterial Populations, Calcium Carbonate, Microbial-induced Calcite Precipitation.Full Text
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