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Dutta, S. K.

• Common Butterflies of Chahala Range of Similipal Tiger Reserve, Orissa, India.

Abstract Views :280  |  PDF Views:0

Authors

H. K. Sahu , Jyotirmay Jena , S. K. Dutta , S. D. Rout

Source

Indian Forester, Vol 132, No 10 (2006), Pagination: 1363-1366

Abstract

No abstract

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• A New Canker Disease of Machilus bombycina

Abstract Views :306  |  PDF Views:0

Authors

N. S. K. Harsh , Kamla Uniyal , S. K. Dutta

Source

Indian Forester, Vol 132, No 12 (2006), Pagination: 1692-1694

Abstract

No abstract

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• Avifauna of Karlapat Wildlife Sanctuary, Southern Orissa, India

Abstract Views :327  |  PDF Views:2

Authors

H. S. Palei , P. P. Mahapatra , S. K. Dutta , L. A. K. Singh , H. K. Sahu , S. D. Rout

Source

Indian Forester, Vol 137, No 10 (2011), Pagination: 1197-1203

Abstract

Birds of Karlapat Wildlife Sanctuary were studied from January 2009 to June 2009, based on observational method. A total of 123 birds were recorded representing 49 families of 15 orders. Nine species are migrant, of which six are winter visitor and three are summer visitor. They also recorded 11 species of water birds here. The major factors, which are detrimental to the Karlapat Wildlife Sanctuary, are identified which includes proposal to lease a part of a land to an industry, use poison for fishing, forest fire, encroachment and hunting. Recommendations for better management of habitat of the Karlapat Wildlife Sanctuary have been provided.

Keywords

Karlapat Wildlife Sanctuary, Green Avadavat, Birds, Conservation Issues

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• Feeding Potential of Coccinella transversalis F. on Different Morphs of Mustard Aphid, Lipaphis erysimi (Kaltenbach)

Abstract Views :237  |  PDF Views:133

Authors

Roshmi Borah ¹, S. K. Dutta ¹

Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN

Source

Journal of Biological Control, Vol 24, No 3 (2010), Pagination: 271-273

Abstract

Feeding potential of the aphidophagous coccinellid beetle, Coccinella transversalis F., was studied under laboratory conditions at Assam Agricultural University, Jorhat. The first instar larvae of C. transversalis were less voracious than older instars. The voracity (no. of aphids consumed/24h) of C. transversalis increased in succeeding instars. The fourth instar larva of C. transversalis consumed 65.67 apterous adults of L. erysimi in 24h and the overall consumption during the entire fourth instar was 252.90 apterous adults. The theoretical effectiveness was worked out as 107.50, which was a product of multiplication of its seasonal average numbers in the field by its average daily consumption.

Keywords

Coccinella transversalis, Feeding Potential, Lipaphis erysimi.

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• Predatory Potential of Episyrphus balteatus (De Geer), an Effective Predator of Lipaphis erysimi (Kaltenbach)

Abstract Views :238  |  PDF Views:116

Authors

Roshmi Borah ¹, S. K. Dutta ¹

Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785013, Assam, IN

Source

Journal of Biological Control, Vol 24, No 2 (2010), Pagination: 173-174

Abstract

Predatory potential of aphidophagous syrphid fly, Episyrphus balteatus (De Geer) (Diptera:Syrphidae) against Lipaphis erysimi (Kaltenbach) was studied under laboratory conditions. The first instar larvae of E. balteatus were less voracious than older instars. The voracity (no. of aphid consumed/24 hr) of E. balteatus increased with succeeding instars. The third instar larva of E. balteatus consumed 120.2 apterous adults of L. erysimi in 24 hrs and during its entire third instar, it consumed 499.24 apterous adults. The theoretical effectiveness was worked out as 84.57, which was the product of multiplication of its seasonal average numbers in the field by its average daily consumption, which showed its potential for use as an effective biocontrol agent against mustard aphid.

Keywords

Episyrphus balteatus, Syrphidae, Feeding Potential, Lipaphis erysimi.

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• Spatial Distribution of Cheilomenes sexmaculata (Fabricius), an Important Predator of Bean Aphid, Aphis craccivora Koch in Green Gram

Abstract Views :307  |  PDF Views:128

Authors

Mareena Sorokhaibam ¹, S. K. Dutta ¹

Affiliations
1 Department of Entomology, College of Agriculture, Assam Agricultural University, Jorhat 785 013, Assam, IN

Source

Journal of Biological Control, Vol 25, No 1 (2011), Pagination: 51– 54

Abstract

Field studies were conducted to study the spatial distribution of Cheilomenes sexmaculata (Fabricius) during summer and kharif seasons, 2009 at instructional cum research farm of Assam Agricultural University, Jorhat, Assam. Various indices of dispersion were used to study the distribution pattern. In both seasons, the variance to mean ratios were found to be less than unity, dispersion parameter 'k' was less than 8 and David and Moore's indices of clumping were negative. Also, Lloyd's indices of mean crowding were less than mean and indices of patchiness were less than unity, indicating positive binomial (regular) distribution of C. sexmaculata at both larval and adult stages.

Keywords

Spatial Distribution, Green Gram, Aphis craccivora, Cheilomenes sexmaculata.

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References

• David, F. N. and Moore, P. G. 1954. Notes on contagious distributions in plant populations. Annals of Botany, London N.S., 18: 47–53.
• Iwao, S. 1972. Application of the m*-m method to the analysis of spatial patterns by changing the quadrat size. Research on Population Ecology, 14: 97–128.
• Lloyd, M. 1967. Mean crowding. Journal of Animal Ecology, 36: 1–30.
• Pandey, A. K. 2004. Spatial distribution of cowpea aphid, Aphis craccivora Koch and its predator Coccinella spp. on alfalfa in cold arid region of Ladakh. Journal of Entomological Research, 28: 277–282.
• Rao, R., Pathak, K. A. and Shylesha, A. N. 2002. Spatial distribution of green aphid Acyrthosiphon pisum and its predator Coccinella transversalis on field pea. Indian Journal of Entomology, 64: 418–423.
• Shukla, R. P. and Pathak, K. A. 1987. Spatial distribution of corn leaf aphid Rhopalosiphum maidis (Fitch) and its predator, Coccinella septempunctata Linn. Indian Journal of Agricultural Sciences, 57: 487–489.
• Southwood, T. R. E. 1978. Ecological Methods with particular reference to the study of insect populations. Chapman and Hall, London, UK, 592 pp.
• Tanigoshi, L. K., Browne, R. W. and Hoyt, S. C. 1975. A study on the dispersion pattern and foliage injury by Tetranychus medinieli (Acarina: Tetranychidae) in simple apple ecosystem. The Canadian Entomologist, 107: 439–446.

• Influence of Physical Traits of Certain Green Gram Varieties on the Life Parameters of Leaf Folder (nacoleia Vulgalis Guen.)

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Authors

Purnima Das ¹, S. K. Dutta ¹, G. Handique ²

Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat Assam, IN
2 Department of Entomology, Assam Agricultural University, Jorhat Assam

Source

International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 159-162

Abstract

Physical traits of crop varieties influence the level of susceptibility of the varieties to the pest species. Investigations were carried out to find the possible influence of physical traits of certain green gram varieties on the life parameters of Nacoleia vulgalis. It was evident from the data that the varieties had significant affects on larval period and fecundity of Nacoleia vulgalisNacoleia vulgalisvulgalis. while the intensity of green colour of leaves, leaf area of medium aged leaves and number of trifoliate leaves showed significant correlations with fecundity. Pilosities of older leaves and medium aged leaves, red and blue colour intensities and leaf area of young leaves did not have any significant effect on larval period and fecundity of N. vulgalis.

Keywords

Fecundity, Green Gram, Growth Index, Larval Period, Nacoleia Vulgalis, Pilosity

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• Framework Mineralogy and Texture of the Upper Palaeocene Sandstones from Laitrengew-Cherrapunji area of East Khasi Hills, Meghalaya

Abstract Views :204  |  PDF Views:2

Authors

P. K. Boruah ¹, S. K. Dutta ¹

Affiliations
1 Applied Geology Department, Dibrugarh University, Dibrugarh - 786 004, Assam, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 56, No 1 (2000), Pagination: 53-65

Abstract

The Laitrengew-Cherrapunji area of East Khasi Hills, Meghalaya exposes a complete Palaeocehe sequence of sedimentary rocks. The coal-bearing sandstone around Laitrengew-Cherrapunji area is regarded as Lakadong Sandstone Member of the Sylhet Formation. The Lakadong sandstones are quartz dominated, fine to medium grained, well to very well sorted, and have not been subjected to significant alteration. The intensive solution effect lowers the packing index values for the underlying Therria Formation around Laitrengew. The quartz arenite type of Therria and Lakadong sandstones is indicative of intense paleoweathering processes under humid climate and low relief. The sediments were derived from the exposed shield areas of plutonic rocks and low to medium grade metasedimentary rocks. The structural, textural as well as compositional attributes of the Therria and Lakadong sandstones indicate that the sediments were deposited in a slowly subsiding, stable depositional area in which the sediments were subjected to higher hydraulic energy winnowing processes. During the period, the paleoclimate was humid and tropical. The intermittent subaerial exposure of the depositional surface and development of shallow swampy lagoons in the coastal environment was supported by the palyontological evidences such as trace fossils and pollen grains of Arecaceue family.

Keywords

Mineralogy, Texture, Palaeocene, Sandstone, East Khasi Hills, Meghalaya.

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• Leucogranite Magmatism in Sewariya-Govindgarh Areas of Rajasthan and its Relevance to Tungsten Mineralisation

Abstract Views :187  |  PDF Views:2

Authors

M. S. Pandian ¹, S. K. Dutta ²

Affiliations
1 Department of Earth Sciences, Pondicherry University, Pondicherry - 605 014, IN
2 State Remote Sensing Application Centre, Vivek Vihar, Itanagar - 791 113, IN

Source

Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 55, No 3 (2000), Pagination: 289-295

Abstract

In Sewariya-Alniawas-Govindgarh areas of central Rajasthan, the Delhi metasediments are intruded by an older, biotite granite (Sewariya granite) which is equivalent to Erinpura granite occurring further south, and an younger, tourmaline leucogranite (Govindgarh granite) which is geochemically specialised. Sewariya granite hosts wolframite bearing quartz veins along its sheared contact with mica schist of Barotiya Group. Govindgarh granite occurs in the form of small intrusive bodies within rocks of Barotiya Group, essentially along a major ductile shear zone at the western margin of South Delhi fold belt. Our study reveals that leucogranite magmatism yielded tungsten mineralisation in Sewariya area.

Keywords

Economic Geology, Leucogranite, Tungsten, Tourmaline, Aravalli Craton, Rajasthan.

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• Spatial Variability in Temporal Trends of Precipitation and its Impact on the Agricultural Scenario of Mizoram

Abstract Views :222  |  PDF Views:120

Authors

S. Saha ¹, D. Chakraborty ², B. U. Choudhury ², S. B. Singh ¹, N. Chinza ³, C. Lalzarliana ⁴, S. K. Dutta ¹, S. Chowdhury ¹, T. Boopathi ¹, Lungmuana ¹, A. R. Singh ¹, S. V. Ngachan ²

Affiliations
1 ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN
2 ICAR Research Complex for NEH Region, Umiam 796 103, IN
3 Directorate of Economics and Statistics, and Government of Mizoram, 796 001, IN
4 Directorate of Crop Husbandry, Government of Mizoram, 796 001, IN

Source

Current Science, Vol 109, No 12 (2015), Pagination: 2278-2282

Abstract

Long-term monthly rainfall observations (1986-2014) were analysed for 12 rain-gauge stations installed at variable altitudes of Mizoram. Our objective was to assess the temporal change in the standardized precipitation index (SPI) values at different timescales using Mann-Kendall trend tests. Significant reductions in post-monsoon and winter rainfall were recorded for most of the sites. Increasing dryness during the winter months may intensify the acute water shortage in Mizoram. Our results emphasize the altitudinal insensitivity of mean monthly rainfall trend and prove the urgent need for adopting suitable water management practices to cope with the water scarcity problem to increase the resiliency of rabi agriculture in Mizoram in near future.

Keywords

Agriculture, Rainfall Pattern, Standardized Precipitation Index, Spatial Variability.

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References

• Das, A., Ghosh, P. K., Choudhury, B. U., Patel, D. P., Munda, G. C., Ngachan, S. V. and Chowdhury, P., Climate change in northeast India: recent facts and events – worry for agricultural management. ISPRS Archives XXXVIII-8/W3 Workshop Proceedings: Impact of Climate Change on Agriculture, 2009, pp. 32–37.
• Ravindranath, N. H. et al., Climate change vulnerability profiles for North East India. Curr. Sci., 2011, 101(3), 384–394.
• Jhajharia, D., Shrivastava, S. K., Sarkar, D. and Sarkar, S., Temporal characteristics of pan evaporation trends under the humid conditions of northeast India. Agric. For. Meteorol., 2009, 149, 763–770.
• Jain, S. K., Kumar, V. and Saharia, M., Analysis of rainfall and temperature trends in northeast India. Int. J. Climatol., 2013, 33(4), 968–978.
• Saikia, U. S. et al., Shift in monsoon rainfall pattern in the North Eastern region of India post 1991. J. Agrometeorol., 2013, 15(2), 162–164.
• WMO, Standardized Precipitation Index User Guide. (eds Svoboda, M., Hayes M. and Wood, D.) WMO-No. 1090, World Meteorological Organization, Geneva, Switzerland, 2012, pp. 8–24.
• McKee, T. B., Doesken, N. J. and Kleist, J., The relationship of drought frequency and duration to time scales. In Proceedings of the IX Conference on Applied Climatology. American Meteorological Society, Boston, MA, 1993, pp. 179–184.
• Naresh Kumar, M., Murthy, C. S., Sesha Sai, M. V. R. and Roy, P. S., On the use of Standardized Precipitation Index (SPI) for drought intensity assessment. Meteorol. Appl., 2009, 16, 381–389.
• Jha, S., Sehgal, V. K., Raghava, R. M. and Sinha, M., Trend of standardized precipitation index during Indian summer monsoon season in agroclimatic zones of India. Earth Syst. Dyn. Discuss., 2013, 4, 429–449.

• Breeding and Nesting Behaviour of Rhacophorus maximus (Anura:Rhacophoridae) in Meghalaya, North East India

Abstract Views :309  |  PDF Views:96

Authors

S. Khongwir ¹, R. N. K. Hooroo ², S. K. Dutta ³

Affiliations
1 Department of Zoology, Shillong College, Shillong 793 003, IN
2 Department of Zoology, North Eastern Hill University, Shillong 793 022, IN
3 Nature Environment and Wildlife Society, Angul 759 123, IN

Source

Current Science, Vol 110, No 6 (2016), Pagination: 1102-1105

Abstract

The present study deals with the breeding and nesting behaviour of Rhacophorus maximus at Cherrapunjee and Mawsynram, Meghalaya, North East India. Breeding activity of R. maximus occurred after the first few showers of rain and an increase in air temperature. The species breeds sporadically for a short period, which lasts for about 6-8 weeks during March and April. Amplexus took place on land as well as in water and lasted for several hours. Aggregations of male frogs making advertisement call at the breeding sites have been observed. Competition among the males to mate with the female frogs and at the same time trying to dislodge the amplecting pairs have also been observed. Multiple amplecting pairs are seen in the temporary rainfed pond at Mawsynram, which appeared to be a congenial breeding habitat during the peak of the breeding period. Both male and female frogs took active part in nest construction. The species constructs foam nests on diverse substrata such as aquatic vegetation about 2-3 cm above the water surface, on bare rocks near the water bodies and on earthen banks. The water temperature recorded during oviposition ranged from 20°C to 22.5°C, air temperature from 21.5°C to 26°C and relative humidity from 65% to 99%. The eggs are large, measuring 2 mm in diameter, unpigmented, white in colour and clutch size varies between 809 and 2059 with a mean of 1351.96 ± 83.07.

Keywords

Aggregation, Amplecting Pairs, Breeding, Foam Nest, Rhacophorus maximus.

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References

• Duellman, W. E. and Trueb, L., Biology of Amphibians, McGrawHill, New York, 1986.
• Heyer, W. R., The adaptive ecology of the species group of the genus Leptodactylus (Amphibia, Leptodactylidae). Evolution, 1969, 23, 421–428.
• Downie, J. R., Functions of the foam in foam-nesting leptodactylids: the nest as a post-hatching refuge in Physalaemus pustulosus. Herpetol. J., 1993, 3(1), 35–42.
• Mohanty-Hejmadi, P. and Dutta, S. K., Life history of the common Indian tree frog, Polypedates maculatus (Gray, 1834) (Anura: Rhacophoridae). J. Bombay. Nat. Hist. Soc., 1988, 85(3), 512– 517.
• Kadadevaru, G. G. and Kanamadi, R. D., Courtship and nesting behavior of the Malabar gliding frog, Rhacophorus malabaricus (Jerdon, 1870). Curr. Sci., 2000, 79(3), 377–380.
• Dutta, S. K., Mishra, S. and Rath, S., Breeding and development of Polypedates maculatus (Anura: Rhacophoridae). Pranikee – J. Zool. Soc., 2001, spl. vol. pp. 121–134.
• Reading, C. J., The effects of variation in climatic temperature (1980–2001) on breeding activity and tadpole stage duration in the commom toad, Bufo bufo. Sci. Total Environ., 2003, 310(1–3), 231–236.
• Roy, D., Choudhury, A. and Borah, B., Role of weather condition on the daily appearance and advertisement call initiation time of Polypedates leucomystax during the breeding season. Zoo’s Print J., 2004, 19(3), 1408–1410.
• Deuti, K., Breeding ecology of Annandale’s tree frog Chirixalus simus (Anura: Rhacophoridae) near Kolkata, West Bengal. J. Bombay Nat. Hist. Soc., 2001, 98(3), 341–346.
• Gibbs, J. P. and Breisch, A. R., Climate warming and calling phenology of frogs near Ithaca, New York, 1990–1999. Conserv. Biol., 2001, 15, 1175–1178.
• Mitchell, N. J., Nest-site selection in a terrestrially breeding frog with protracted development. Aust. J. Zool., 2002, 50, 225–235.
• Dutta, S. K. and Mohanty-Hejmadi, P., Breeding and life history of the Indian bull frog, Rana tigerina (Daudin). Prakruti Utkal Univ. J. Sci., 1976, 13(1&2), 51–59.
• Dutta, S. K., Jena, S. and Mohanty-Hejmadi, P., Breeding and development of Ramanella variegata (Anura: Microhylidae). J. Zool. Soc. India, 1990–91, 42–43, 55–76.
• Biju, S. D., A novel nesting behavior of a treefrog, Rhacophorus lateralis in the Western Ghats, India. Curr. Sci., 2009, 97(3), 433– 437.
• Sinsch, U., Mini-review: the orientation behavior of amphibians. Herpetol. J., 1991, 1, 541–544.
• Davies, N. B. and Halliday, T. T., Competitive mate searching in male common toad, Bufo bufo. Anim. Behav., 1979, 27, 1253–1267.
• Giaretta, A. A. and Menin, M., Reproduction, phenology and mortality sources of a species of Physalaemus (Anura: Leptodactylidae). J. Nat. Hist., 2004, 38, 1711–1722.
• Eggert, C. and Guyétant, R., Reproductive behavior of spadefoot toads (Pelobates fuscus): daily sex ratios and males’ tactics, ages, and physical condition. Can. J. Zool., 2003, 81, 46–51.
• Roy, D., Development of hearing in vertebrates with special reference to anuran acoustic communication. J. Biosci., 1994, 19(5), 629–644.
• Menin, M. and Giaretta, A. A., Predation on foam nests of leptodactyline frogs (Anura: Leptodactylidae) by larvae of Beckeriella niger (Diptera: Ephydridae). J. Zool., 2003, 261, 239–243.

• Population Fluctuations of Sugarcane Woolly Aphid, Ceratovacuna lanigera Zehntner (Homoptera:Aphididae), and its Natural Enemies in Plant and Ratoon Sugarcane Crops in Assam

Abstract Views :242  |  PDF Views:143

Authors

Saurabh Sarma ¹, D. K. Saikia ¹, Badal Bhattacharyya ¹, S. K. Dutta ¹

Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat - 785013, Assam, IN

Source

Journal of Biological Control, Vol 21, No 2 (2007), Pagination: 241-246

Abstract

The seasonal incidence of sugarcane woolly aphid, Ceratovacuna lanigera Zehntner (Homoptera: Aphididae), and its natural enemies was studied at Instructional-Cum-Research (ICR) Farm, Assam Agricultural University (AAU), Jorhat and at Sugarcane Research Station (SRS), Buralikson, Golaghat during 2004-05. Out of five species of natural enemies recorded at ICR Farm, AAU, Jorhat, Eupeodes confrater (Wiedemann), Chrysoperla carnea (Stephens), Coelophora biplagiata (Mulsant) and Dipha aphidivora (Meyrick) had significant positive impact on sugarcane woolly aphid population, while non-significant negative correlation of aphid population was observed with the population of Encarsia flavoscutellum Zehntner. Multiple regression analysis of different natural enemies with the population of C. lanigera showed 89.0 per cent relationship with the aphid population. At SRS, Buralikson, Golaghat, the only observed natural enemy D. aphidivora showed significant positive impact on woolly aphid population.

Keywords

Ceratovacuna lanigera, Encarsia flavoscutellum, Population Build Up, Predators, Sugarcane.

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• Interaction between Aphis craccivora Koch and its Predators, Coccinella transversalis Fabricius (Coleoptera:Coccinellidae) and Ischiodon scutellaris (Fabricius) (Diptera:Syrphidae)

Abstract Views :208  |  PDF Views:133

Authors

K. K. Sarma ¹, S. K. Dutta ¹, B. K. Borah ¹

Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat 785 013, Assam, IN

Source

Journal of Biological Control, Vol 10, No 1&2 (1996), Pagination: 125-128

Abstract

The interaction of Coccinella transversalis Fabricius and lschiodon scutellaris (Fabricius) with the aphid, Aphis craccivora Koch was studied on green gram by estimating the prey and predator populations at weekly interval. Populations of both the predators had positive correlation with the aphid, attaining population peak simultaneously with their prey. The population decline of the prey was followed by their predators.

Keywords

Aphis craccivora, Coccinella transversalis, Ischiodon scutellaris, Interaction.

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• Quality of Rasogolla Marketed in the State of Bihar and Jharkhand

Abstract Views :198  |  PDF Views:0

Authors

D. Gangopadhyay ¹, S. K. Dutta ¹, S. R. Chakrabarti ¹, S. K. Gangopadhyay ¹

Affiliations
1 Department of Dairy Technology, West Bengal University of Animal and Fishery Sciences, P.O. Krishi Viswavidyalaya-741 252, Mohanpur, Nadia, West Bengal, IN

Source

The Indian Journal of Nutrition and Dietetics, Vol 42, No 11 (2005), Pagination: 522-527

Abstract

Rasogolla is a chhana based milk sweet highly popular in India, particularly in tine eastern states. Cow's milk is preferred over buffalo milk for preparation of rasogolla as it yields soft and smooth body and spongy texture. Market samples of rasogolla varies widely not only in chemical composition and microbial quality but also in Theological/textural parameters, flavour and appearance. Few attempts have been made in the direction of systematic study on quality of market rasogolla considering its chemical composition, microbiological standards and textural parameters.

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• Multi COB-Bearing Popcorn (Puakzo) Maize:A Unique Landrace of Mizoram, North East, India

Abstract Views :377  |  PDF Views:85

Authors

A. Ratankumar Singh ¹, S. B. Singh ², S. K. Dutta ³, T. Boopathi ¹, Lungmuana ⁴, S. Saha ⁴, M. Thoithoi Devi ⁴, N. Hemanta Singh ¹

Affiliations
1 Division of Crop Protection, ICAR-Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN
2 Division of Social Science, ICAR-Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN
3 Division of Horticulture, ICAR-Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN
4 Division of Natural Resource Management, ICAR-Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN

Source

Current Science, Vol 110, No 8 (2016), Pagination: 1392-1393

Abstract

Mizoram is a mountainous (Lushai hill range) state with closely spaced intermountain valleys, demographically dominated by indigenous tribes (Mizo) constituting 94.4% of the total population. These tribal populations ensure the conservation of plant genetic resources for the future, for the food and nutritional security of an increasing population. Since 1976, in the northeastern hill region intensive collections of maize landraces were made by ICAR-NBPGR, New Delhi and diversity of landraces maize from this region comprised 36% of the total collection from whole India, which was the highest number of accession among other regions.

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• Morpho-Agronomic Diversity in Pole-Type Common Bean (Phaseolus vulgaris L.) Landraces from Lushai Hills of North-East India

Abstract Views :185  |  PDF Views:113

Authors

S. K. Dutta ¹, S. B. Singh ¹, T. Boopathi ¹, A. R. Singh ¹, Y. Ramakrishna ¹

Affiliations
1 ICAR-RC NEH Region, Mizoram Centre, Kolasib - 796 081, IN

Source

Journal of Horticultural Sciences, Vol 10, No 2 (2015), Pagination: 177-182

Abstract

The present study was based on morphological and agronomical characterization of 23 pole-type common bean (Phaseolus vulgaris L.) landraces collected from Lushai hills of North-East India. Extensive variation in plant and seed traits was found in 16 morphological and agronomical characters. Cluster analysis based on Euclidean distance grouped the genotypes into five main branches, reflecting their growth type and reproductive traits. Significant positive or negative correlation was observed among important traits. Principal component analysis was used for assessing patterns of variation by accounting for all the 10 quantitative and six qualitative variables together. Ordination among accessions showed that the first five principal components had Eigen values greater than one, and cumulatively accounted for 72% of the variation. Characterization based on quantitative and qualitative traits enabled separation of accessions into various groups representing landraces with distinct characters.

Keywords

Common Bean, Pole-Type, North-East India, Landraces, Principal Components, Morphological Characterization.

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References

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• Díaz-Batalla, L., Widholm, J.M., Fahey, G.C. Jr., CastañoTostado, E. and Paredes-López, O. 2006. Chemical components with health implications in wild and cultivated Mexican Common bean seeds (Phaseolus vulgaris L.). J. Agril. Food Chem., 54:2045-2052
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• Calcutta-A Case Study for Urban Renewal

Abstract Views :155  |  PDF Views:0

Authors

S. K. Dutta ¹

Affiliations
1 Calcutta Metropolitan Planning Organisation, IN

Source

Journal of the Association of Engineers, India, Vol 47, No 2 (1972), Pagination: 80-82

Abstract

Most cities of the world, with the exception of a few, are found to be backward in the sense of being ill-equipped to cope with the needs of today’s environment. Continuous changes are, therefore, being made to readjust them to our present day needs so that the city does not become sick to the extent of being unable to serve its citizens satisfactorily. An old car which fails to serve its purpose can be discarded, but one cannot do the same for a city whose deteriorated environment fails to keep up with the needs of a changing society in every respect. It goes without saying that Calcutta has become like many other cities of the world, a focal point of urban life, with all its chaos, excitement, and controversy. In spite of all its drawbacks, the vitality and importance of this city is unquestionable.

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• Selected Aspects of Subdivision Control in an Urban Area

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Authors

S. K. Dutta ¹

Affiliations
1 Calcutta Metropolitan Planning Organisation, IN

Source

Journal of the Association of Engineers, India, Vol 45, No 4 (1970), Pagination: 155-158

Abstract

1. Objectives of Planning Housing
The purpose of this paper is to discuss the problems associated with the physical development of the community and suggest some approaches to achieve minimum standard of development either to develop new areas of growth or old places.

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• Occurrence, Severity and Association of Fungal Pathogen, Botrydiplodia theobromae with Sudden Death or Decline of Tree Bean (Parkia timoriana, (DC.) Merr) in North Eastern India

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Authors

A. Ratankumar Singh ¹, S. K. Dutta ¹, S. B. Singh ¹, T. Boopathi ¹, S. Lungmuana ¹, S. Saha ¹, Vishambhar Dayal ¹, Romila Akoijam ², S. K. Sharma ², N. Hemanta Singh ²

Affiliations
1 ICAR Research Complex for NEH Region, Mizoram Centre, Kolasib 796 081, IN
2 ICAR Research Complex for NEH Region, Manipur Centre, Lamphelphat 795 004, IN

Source

Current Science, Vol 115, No 6 (2018), Pagination: 1133-1142

Abstract

Tree bean, Parkia timoriana is one of the most important perennial tree legume vegetable crops in north eastern region (NER) of India. Recently, sudden death or decline is emerging as a major constraint in the production of tree bean. The prevalence, intensity and etiology of this disease have not been extensively studied. The present work was aimed at studying the symptomology, severity and etiology of sudden death or decline of tree bean in the north eastern region of India. Typical symptoms of tree bean decline were initiated with wilting of half portion of the tree, excessive shedding of leaves, gradual drying up leading to death, and secondary infestation by insects on dead trees. The highest disease severity of 68.5% was observed in warmer regions like Kolasib, Mizoram. During survey, small bark borer was recorded in all districts and levels of infestation rate (holes/ft2 of log) reached maximum up to 25.49 in Hnanthial of Lunglei district. Young trees in the range 1–10 years with 57.32% (917 trees) of total trees (1600) infected were most susceptible to the disease compared to 12.58% (201 trees) infection in old trees in the range 21–30 years. The frequently associated pathogen with sudden death or decline of tree bean was identified as Botrydiplodia theobromae at the Indian Type Culture Collection, ICAR-IARI, New Delhi. It was the most aggressive species and proven to be pathogenic to tree bean following artificial inoculation.

Keywords

Botrydiplodia theobromae, North Eastern India, Parkia timoriana, Sudden Death or Decline Disease, Tree Bean.

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• Quality Food Production by Integration of Good Agricultural Practices (GAPs) in Organic Agriculture

Abstract Views :221  |  PDF Views:0

Authors

Asheesh Chaurasiya ¹, Durgesh Singh ¹, S. K. Dutta ¹, S. K. Gupta ¹

Affiliations
1 Department of Agronomy, Bihar Agricultural University, Sabour, Bhagalpur (Bihar), IN

Source

Rashtriya Krishi (English), Vol 13, No 2 (2018), Pagination: 95-97

Abstract

India’s basic strength lies in agriculture but its vast potential has not been fully exploited. Themarket potential can appreciate by reforming agriculture and making its produce internationally competitive in terms of quality and safety of food.Producing internationally competitive, quality farm produce per se requires competitive innovative farming practices and comprehending the concept of globally accepted Good Agricultural Practices (GAPs) within the framework of commercial agricultural production for long term improvement and sustainability is important. Implementation of GAPs would promote optimum utilization of resources such as pesticides, fertilizers, water and eco-friendly agriculture. It also takes care in integrating pre and post-harvest handling and other logistics. Good Agricultural Practices (GAPs) is important in the areas where appropriated control measures need to be strengthened and farms producing raw materials to ensure sustained supply of produce of their desirable quality. Good Agricultural Practices (GAPs) based farming, Integrated Nutrient Management and Integrated Pest Management (IPM) with more emphasis on biological methods of control, soil test based nutrient application, increasing nutrient use efficiency, adoption of precision farming technologies and use of pest and disease resistant varieties, etc. seems to be a viable solution. It has the potential to address the concerns of different stakeholders (governments, food retailing industries, farmers and consumers) about food production and security, food safety and quality and the environmental sustainability of agriculture.

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• Unique Breeding Activity and Oviposition in Annandale’s High-Altitude Tree Frog, Kurixalus naso (Annandale, 1912) in Meghalaya, North East India

Abstract Views :273  |  PDF Views:69

Authors

P. W. Shangpliang ¹, R. N. K. Hooroo ², S. K. Dutta ²

Affiliations
1 Department of Zoology, North Eastern Hill University, Shillong 793 022, IN
2 Nature Environment and Wildlife Society, Angul 759 123, IN

Source

Current Science, Vol 118, No 3 (2020), Pagination: 467-472

Abstract

The present study highlights the unique characteristics of the breeding activity and oviposition of Annandale’s high-altitude tree frog, Kurixalus naso (Annandale, 1912) at Mawsynram, Meghalaya, North East India. After the cold, dry, winter months (September– January), the first rainfall in February triggers the onset of a short breeding activity of the species, which lasts for 3–4 weeks during February to March. The first shower causes an increase in soil moisture content and decrease in soil temperature. Immediately after the first showers, males make their advertisement calls, followed by females engaging in amplexus with the males and ovipositing in the moist soil. The females come only once to the breeding site and leave after mating; parental care is provided by the males. Multiple amplecting pairs at the breeding site are seen inside the burrows and some are observed to amplect in the open soil surface, lasting for 5–6 h. No aggregation and competition among the males is observed. The amplecting females lay eggs inside the excavated burrows and the males, using their hind limbs, expose the eggs by pushing them to the mouth of the burrowing hole. Sometimes, the females oviposit at the base of hollow tree trunks and occasionally in the open soil surface. The eggs are mixed with the soil and they resemble perhaps masquerade as seeds. Most frogs display a biphasic life cycle. However, K. naso shows a distinct non-aquatic oviposition with aquatic larva. Further, soil moisture content and temperature may support the development of embryos in open soil surfaces and burrows.

Keywords

Amplexus, Breeding, Burrows, Kurixalus naso, Oviposition.

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