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Agriculture University, Jodhpur

Agriculture University, Jodhpur was established on 14th September, 2013 by Government of Rajasthan under Agriculture University, Jodhpur Act 21 of 2013 to focus on holistic development of arid and semi-arid regions of the state covering 6 districts (Jodhpur, Barmer, Nagaur, Pali, Jalore and Sirohi), constituting 28% of total geographical area which is sustaining 20.8% human and 28.4% animal population of the state. The districts under jurisdiction of the university cover 3 agro-ecological zones of the state. These are Arid Western Plain Zone Ia (Jodhpur and Barmer districts), Transitional plain of Luni Basin Zone IIb (Jalore, Pali, and Sirohi districts) and part of Transitional Plain of Inland Drainage Zone IIa (Nagaur district). The university has 1 institute of diploma and 3 colleges to produce highly competent educated human resources in agriculture and allied sciences besides 2 agricultural research stations, one each in zone Ia & IIb and 3 agricultural research sub stations, one in each zone to prepare, plan and perform highly need based research in this acute water scarce but naturally rich bio-diversified zone of the country. The third most important part in tri-pillar (Teaching, Research & Extension) of agricultural development, the extension for transfer of technologies are reached to doorsteps of the farming community by 6 Krishi Vigyan Kendras (K-V-Ks), 2 in Nagaur district and 1 each in Jodhpur, Barmer, Jalore & Sirohi districts under the umbrella of the university. The different units of teaching, research and extension are coordinating to systematically run by the headquarter situated at Mandor, Jodhpur.

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20221
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Subject: Agricultural Entomology × Author: Mishra, Shreya ×
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    ThesisItemOpen Access
    Population Dynamics of Insect Pests and Management of Aphid in Fenugreek (Trigonella foenum-graecum L.)
    (Agriculture University, Jodhpur, 2022-07-25) Mishra, Shreya; Pandey, Shalini
    The study on ‘Population dynamics of insect pests and management of aphid in fenugreek (Trigonella foenum-graecum L.)’ under semi-arid conditions was carried out in Rabi, 2021-22 at Research Farm, ARS, Mandor, Jodhpur. The infestation of aphid, Aphis craccivora Koch and leaf miner, Liriomyza congesta (Becker) commenced in 1st SMW whereas infestation of weevil, Hypera postica (Gyllenhal) commenced in 5th SMW on fenugreek crop and subsequently the population of leaf miner, weevil and aphid increased gradually and reached to its peak in the 6th, 9th and 5 th SMW, respectively, thereafter it declined gradually. The correlation coefficient between larval population of leaf miner showed non-significant correlation with maximum temperature, minimum temperature, rainfall, maximum relative humidity, minimum relative humidity and recorded sunshine hours (r = -0.216, r = -0.349, r = -0.093, r = 0.205, r = 0.197 and r = 0.375, respectively) with the larval population of leaf miner. The grub population of the weevil had negative significant correlation with rainfall and recorded sunshine hours (r = -0.612 and r = -0.676, respectively). The minimum temperature had negative significant correlation (r = -0.553) whereas maximum relative humidity had positive significant correlation (r = 0.534) with aphid population. Out of eleven genotypes screened against the aphid, A. craccivora in fenugreek, the genotypes RMt-351 and RMt-354 were categorized as less susceptible against aphid. The highly susceptible genotypes against aphid were AFg-3, RMt-303, while AFg-1, AFg-2, AFg-4, AFg-5, RMt-1, RMt-143, RMt-305 were categorized as moderately susceptible for aphids. The plant attributes such as plant height, pod length, number of branches/plant, number of seeds/pod, number of pods/plant showed non-significant correlation with mean aphid population. Out of nine insecticides tested, flonicamid 50 WG was found most effective against population of aphid, A. craccivora in fenugreek. After two sprays, flonicamid 50 WG was found most effective with no aphid population recorded followed by cyantraniliprole 10.26 OD (0.67 aphids/5 cm central shoot) and thiamethoxam 25 WG (1.00 aphids/5 cm central shoot). While the treatments with azadirachtin 10,000 ppm was least effective against aphid population. The maximum yield (1722 kg/ha) and net returns (Rs. 74450 per ha) of fenugreek was obtained from the plots treated with flonicamid 50 WG. The highest benefit-cost ratio was observed in plots treated with thiamethoxam 25 WG (3.79:1) followed by flonicamid 50 WG (3.57:1).