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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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20171
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Subject: Nematology × Author: Gogoi, Hemanga Jyoti × End date: 2017 × Start date: 2017 × Type: Thesis ×
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    ThesisItemOpen Access
    Occurrence and distribution of plant parasitic nematodes associated with tea gardens in Dibrugarh district of Assam
    (AAU, Jorhat, 2017-01) Gogoi, Hemanga Jyoti; Borah, A.
    The present investigations were carried out to know the occurrence and distribution of plant parasitic nematodes associated with tea plants of different tea gardens in Dibrugarh district. Soil samples were collected from different tea gardens of seven blocks from Dibrugarh district. Survey of plant parasitic nematodes revealed that eight genera of plant parasitic nematodes were found to be associated with tea plants of Dibrugarh district. The genera of plant parasitic nematodes recorded were viz., Helicotylenchus, Hoplolaimus, Tylenchorhynchus, Paratylenchus, Meloidogyne, Xiphinema and also nematodes genera found under tylenchs and criconematids. Community analysis of plant parasitic nematodes revealed that the genus Helicotylenchus ranked first in relative frequency, absolute frequency, absolute density, relative density and prominence value. The genus Hoplolaimus ranked second in relative frequency, absolute frequency, absolute density, relative density and prominence value. The genus Paratylenchus ranked third in relative frequency, absolute frequency, absolute density, relative density and prominence value. Studies on bio-management of root-knot nematode Meloidogyne incognita on tea under pot condition showed that all the treatments with Glomus fasciculatum, Trichoderma harzianum, Trichoderma viride, neem cake and carbofuran 3 G alone or in combination significantly increased plant growth parameters of tea and decreased number of galls, eggsmasses and final nematode population in soil over control. The maximum increase in plant growth parameters viz., shoot length, root length, fresh and dry weight of shoot and root were recorded with the treatment Glomus fasciculatum @ 300 spores/kg of soil + Trichoderma harzianum @ 4 gm/kg of soil + neem cake @15 gm/kg of soil. While, the maximum reduction of number of galls and egg masses and final nematode population in soil were recorded in the treatment with carbofuran 3G @ 3 g/kg of soil followed by the treatment with Glomus fasciculatum @ 300 spores/kg of soil + Trichoderma harzianum @ 4 gm/kg of soil + neem cake @15 gm/kg of soil which were at par. The treatment with Glomus fasciculatum @ 300 spores/kg of soil + Trichoderma harzianum @ 4 gm/kg of soil + neem cake @15 gm/kg of soil was found to be best in increasing plant growth parameters of tea and in decreasing number of galls, eggsmasses and final nematode population in soil over control.