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Govind Ballabh Pant University of Agriculture and Technology, Pantnagar

After independence, development of the rural sector was considered the primary concern of the Government of India. In 1949, with the appointment of the Radhakrishnan University Education Commission, imparting of agricultural education through the setting up of rural universities became the focal point. Later, in 1954 an Indo-American team led by Dr. K.R. Damle, the Vice-President of ICAR, was constituted that arrived at the idea of establishing a Rural University on the land-grant pattern of USA. As a consequence a contract between the Government of India, the Technical Cooperation Mission and some land-grant universities of USA, was signed to promote agricultural education in the country. The US universities included the universities of Tennessee, the Ohio State University, the Kansas State University, The University of Illinois, the Pennsylvania State University and the University of Missouri. The task of assisting Uttar Pradesh in establishing an agricultural university was assigned to the University of Illinois which signed a contract in 1959 to establish an agricultural University in the State. Dean, H.W. Hannah, of the University of Illinois prepared a blueprint for a Rural University to be set up at the Tarai State Farm in the district Nainital, UP. In the initial stage the University of Illinois also offered the services of its scientists and teachers. Thus, in 1960, the first agricultural university of India, UP Agricultural University, came into being by an Act of legislation, UP Act XI-V of 1958. The Act was later amended under UP Universities Re-enactment and Amendment Act 1972 and the University was rechristened as Govind Ballabh Pant University of Agriculture and Technology keeping in view the contributions of Pt. Govind Ballabh Pant, the then Chief Minister of UP. The University was dedicated to the Nation by the first Prime Minister of India Pt Jawaharlal Nehru on 17 November 1960. The G.B. Pant University is a symbol of successful partnership between India and the United States. The establishment of this university brought about a revolution in agricultural education, research and extension. It paved the way for setting up of 31 other agricultural universities in the country.

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  • ThesisItemOpen Access
    Rhizoctonia aerial blight of soybean: Recent techniques of management
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Bisht, Ritu; Dubey, K.S.
    Soybean (Glycine max L. Merril) is one of the most important crop in the world today by the virtue of its richness in balanced protein and oil content. Diseases caused by various pathogens are indeed a worldwide important problem in soybean production . Among biotic diseases, Aerial Blight/ web Blight of soybean caused by a fungus i.e. Rhizoctonia solani Kuhn (Teleomorph: Thanatephorus cucumeris (Frank)(donk) is a serious problem in soybean and considered to be menacing and causes heavy losses in yield particularly in warm and humid part of the country. The pathogen is seed-borne,soil-borne as well as wind-borne in nature and it has very wide host range as well as lack of resistance in soybean germplasm to aerial blight has further aggravated the problem, therefore, its management is always challenging.The present investigations were done to study the recent techniques to be used for managing Rhizoctonia aerial blight of soybean. Five strains of Trichoderma harzianum and three strains of Pseudomonas sp. were screened for their antagonistic effect against R.solani.Among fungal antagonists 89-N and LTh-14 showed strongest antagonistic effect against the test fungus,while Th-69 was least effective in parasitizing the test fungus.In case of bacterial antagonists PS F11 was found most effective and potential bio-agent strain in dual culture technique. Among ten organic matter amended soil extracts screened, Pressmud amended soil was found very effective in inhibiting the growth of the test fungus. Out of ten organic matter amended soils and inoculated with R.solani,pressmud increased the seed germination and decreased the seed rot, seedling rot and disease severity.Orange peel showed highest vigour index while maximum nodulation was obtained in green pea manure.The effect of wheat straw was similar to the check. Among the thirteen herbal extracts evaluated against R.solani,bel was found most effective at both the concentrations i.e. 10 % and 20 % while, morpankhi and ginger were found least effective in inhibiting the growth of R.solani.Among seven animal by-products tested cow-urine (old) was found most effective in inhibiting growth of the test fungus while, cow-milk was found least effective. Out of ten essential oils screened, lemon grass,lemon tulsi and peppermint showed 100 % inhibition of mycelial growth of R.solani while, khus and patchouli oil were found least effective. All the essentials oils were also tested at higher concentrations i.e. 500 ppm , 1000 ppm, 1500 ppm , 2000 ppm and 2500 ppm and showed 100 % growth inhibition of the test fungus except khus and patchouli oil. Among the five mineral oils evaluated against the test pathogen ,petrol exhibited maximum growth inhibition of R.solani. Liquid paraffin was found least effective against the test fungus. Tebuconazole and Thiophanate-methyl showed 100 % mycelial growth inhibition at all the concentration i.e. 25 ppm, 50 ppm and 100 ppm and were most effective against R.solani . Thiram was found least effective against the test fungus.
  • ThesisItemOpen Access
    Studies on the responses of exotic and indigenous germplasm of Indian-Mustard (Brassica juncea (L.) Czern & Coss.) against major diseases and yield potential
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Joshi, Pooja; Awasthi, R.P.
    The Oilseed Brassica is the second largest oilseed crop after groundnut in terms of area and production in India. These crops have been known to be attacked by a variety of pathogens culminating in huge losses in seed yield. Peronospora parasitica (Pers.ex.Fr.) Fr. (new name Hyaloperonospora parasitica), Albugo candida (Pers. Ex. Lev.) Kuntze and Sclerotinia sclerotiorum (Lib) causing downy mildew, white rust and Sclerotinia rot, along with Alternaria brassicae (Berk) Sacc. Causing Alternaria Blight, respectively are the major pathogens which can cause major yield losses. A field experiment was conducted during rabi season of 2011-12 and 2012-13 at N. E. Borlaug Crop Research Centre of Govind Ballabh Pant University of Agriculture & Technology, Pantnagar (Uttarakhand) in augmented block design to study the evaluation of 480 B. juncea accessions for resistance/tolerance against major diseases to search resistant/tolerant sources or improved materials as such which have high yielding potential, taking 240 germplasms each year and was found that accession no. 491572 with 13 other accessions were highly resistant against downy mildew during 2011-12 crop season. Accession no. 491546 gave moderately resistant reaction against white rust (44.78%). None of the accession showed resistant reaction towards Alternaria blight on leaves during 2011-12 and 2012-13 crop seasons. Accession no. 491314 showed highly resistant reaction with minimum disease index on pod (12.45%) during 2011-12 crop season. Maximum plant height was attained by 113099 (170.03 cm) while maximum number of primary and secondary branches were produced by 399854 (9.42) and 426398 (17.70) respectively for 2012-13 crop season. Accession no. 426372 showed resistant reaction to Alternaria blight at pod and give high seed yield per plant with significantly higher test weight (4.90 g). During 2012-13, accession no 385673 was found to be highly resistant while 41 accessions were found to be resistant for downy mildew. Accession no. 491471 and 491326 were moderately resistant to white rust and downy mildew both during 2011-12 crop season. Accession no. 491604 was found highly resistant and moderately susceptible to downy mildew and Alternaria blight respectively as well as give higher yield and test weight during 2011-12 which could be used as donor for multiple disease resistance for the development of varieties.
  • ThesisItemOpen Access
    Estimation of yield losses due to major diseases in improved varieties of rapeseed-mustard
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Ladhu Ram; Awasthi, R.P.
    The Oilseed Brassica crops are the most important rabi crops of the country. The production of oilseed brassicas, is gravely hampered by the fungal diseases. Downy mildew (Hyaloperonospora parasitica), Alternaria blight (Alternaria brassicae (Berk) Sacc.), White rust (Albugo candida (Pers. Ex. Lev.) Kuntze) are the major diseases which can cause major yield losses in Rapeseed-Mustard. The present investigations were therefore carried out with the objectives to estimate of yield losses due to major diseases in improved varieties of Rapeseed Mustard and to search for the most economical and effective way to reduce the losses in seed yield of improved varieties. Field experiment regarding above objective was conducted for consecutive two crop season during 2011-2012 and 2012-2013 at the NEB Crop Research Centre, G.B Pant University of Agriculture & Technology, Pantnagar situated in Tarai region of Uttarakhand. The experiment was conducted in RBD in split plot arrangement with three replications. Nine different improved varieties each of Toria (Brassica rapa var. toria), Yellow sarson (Brassica rapa var. yellowsarson) and Rai (Brassica juncea) were used as main plots, while protected and unprotected treatments were considered in sub-plots seperately. All the varieties of Toria, Yellow sarson and Rai were found susceptible to Downy mildew at cotyledon stage. DM index was found maximum in variety PTE-2008-6 (12.97 %), PYS-2008-5 (12.70 %) and NDRE-4 (12.01 %) of Toria, Yellow sarso and Rai respectively. All the varieties of Toria and Yellow sarso were found resistant to White rust disease. In case of Rai, varieties PR-2006-14 and NDRE-4 found susceptible to white rust while varieties PRB-2008-5, PRE-2009-12, and PRB-2004-3-4 found slightly tolerant to White rust disease. All the varieties of Toria, Yellow sarso and Rai found susceptible to Alternaria blight disease except Divya which was found slightly tolerant to the disease Maximum yield (qha-1) was found in variety PT 2006-02, PPS-1, and Divya of Toria, Yellow sarso and Rai respectively during 2011-12 and 2012-13. Yield loss (%) ranges from 9.62 % to 32 % in Toria, 9.94 to 23.37 % in Yellow sarso and 3.16 to 31.87 % in Mustard.In Toria, yield loss was found maximum in variety Uttara (14.38%) followed by PTE-2008-2 (13.47%) and PT-2006-2 (13.26%) during 2011-12. During 2012-13 maximum yield loss was found in variety PTE-2008-2 (30.64%) followed by PT-2006-4 (26.54%). In Yellow sarso, yield loss was found maximum in variety FTPYS-Local (23.37%) and (21.43%) during 2011-12 and 2012-13 respectively. In Rai, yield loss was found maximum in variety PRB-2004-3-4 (25.10%) and (25.83%) during 2011-12 and 2012-13 respectively. On the basis of present investigation it can be concluded that seed treatment with Apron SD @ 6g/Kg and 5-6 alternate sprays of Ridomil MZ and Mancozeb is found most economical and highly effective for the management of White rust, Downy mildew and Alternaria blight diseases to the extent of 30 % which ultimately reduces the yield loss at greater extent in all the varieties of Toria, Yellow Sarso and Rai.
  • ThesisItemOpen Access
    Drechslera blight of soybean: Symptomatology, etiology and management
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Gairola, Kalpana; Dubey, K.S.
    Drechslera blight of soybean caused by Drechslera glycini is widely distributed in warm and humid areas, especially in the tropics and it causes heavy losses (quantitatively and qualitatively). Under artificial inoculated conditions brownish spots were observed on leaves near the leaf margin with light brown centre and dark brown margin. and brownish discoloration were observed on hypocotyls and cotyledons. Seven media were tested for the growth of the Fungus, wherein, Oat meal agar was best for growth as well as sporulation of the test fungus. The pathogen grew best at pH 7 and 350C temperature. In-vitro antagonistic potential of six fungal and three bacterial bioagents wherein T. harzianum showed as potential strong potent bioagent against D. glycini. Among eight organic matters amended soil extracts tested, Press mud was found most effective against test fungus. Out of eight organic matter amended soils, inoculated with the test pathogen, Press mud was found most effective and gave highest seed germination. Tea waste was found best for nodulation and Press mud showed least disease severity as well as minimum preemergence mortality. while the post emergence mortality was found least in Bannana peel amended soil. Among eight Botanical extracts tested for their antifungal property, Ginger was found most effective. Out of Nine fungicides tested in which Tabuconazole gave maximum control of the test pathogen and Tridemefon, Thiophanatemethyle and Companian were found less effective.
  • ThesisItemOpen Access
    Chemical and biological management of major foliar diseases of cucumber under tarai conditions of Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Panwar, Priyanka; Singh, R.P.
    Cucumber (Cucumis sativus) holds the special place among cucurbits production because of its economic and nutritional importance. Several diseases have been reported to attack cucumber crop in field but Downy mildew (Pseudoperenospora cubensis) and Alternaria leaf spot caused by Alternaria cucumerina and Alternaria alternata are most important foliar diseases under the tarai conditions of Uttarakhand. Chemicals are still employed as the primary tool for the control of foliar diseases. Search for newer and safer compound for the disease management is a continuous process. Since cucumber is consumed directly after its harvest from the field, uses of chemicals need to be minimized. Therefore, it is the high time to employ and incorporate the use of bioagent as an important component of Integrated Disease Management (IDM). During evaluation of fungicides against downy mildew mixtures of systemic and contact fungicides were found more effective as compared to systemic or contact fungicides alone. Combination of Mandipropamid 5% + Mancozeb 60%WG @ 1.25kg/ha gave the best control of downy mildew and increased yield as compared to untreated control. Pyraclostrobin 5% + Metiram 55% WG @ 1.5 kg/ha was found to be best treatment in minimizing the severity of Alternaria leaf spot. Although combinations of systemic and contact fungicides were quite effective in minimizing the disease severity vis-a-vis increasing the yield but they were not found economically superior. Hexaconazole 5 SC@ 500 ml/ha which was moderate in reducing the disease severity as well as in increasing the yield provided highest B:C ratio (13.7) followed by mancozeb75 WP@1.5 kg/ha (B:C ratio, 10.0). All the bioagents reduced the downy mildew severity significantly over control. However, combinations of bioagents were found more effective as compared to the use of single bioagent. Six applications of Trichoderma harzianum + Pseudomonas fluorescens @ 5kg/ha was found to be best treatment in minimizing the severity of Downy mildew and Alternaria leaf spot and also realizing the highest yield. Although combination of bioagents were found most effective in minimizing disease severity as well as increasing the yield but they were not found economically superior. Three applications of bioagents provided higher B:C ratio as compared to 6 applications, out of which B. subtilis @ 1kg/ha, that was lowest in reducing the disease severity as well as in increasing the yield, provided highest B:C Ratio (11.9) followed by 3 applications of T. harzianum + P. fluorescens @ 5kg/ha (10.6). It can be concluded that, for chemical management of downy mildew and Alternaria leaf spots of cucumber, 3 spraying of Hexaconazole 5 SC @ 500 ml/ha or Mancozeb 75WP @ 1.5 kg/ha and for biological management 3 spraying of B. subtilis @ 1kg/ha or T. harzianum + P. fluorescens @ 5kg/ha can be recommended.
  • ThesisItemOpen Access
    Relationships between rice neck blast and leaf blast epidemics
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-08) Ghatak, Abhijeet; Kumar, J.
    Rice blast, caused by Magnaporthe oryzae, causes infections on different rice organs: leaf, collar, neck, and panicle. Neck blast causes important yield losses in tropical Asia, which are larger than yield losses caused by leaf blast. In spite of this, the majority of research has been focusing on leaf blast. This Ph.D. research addresses epidemiological aspects of the relationships between leaf blast epidemics and neck blast intensity, and the possible mechanisms underlying these relationships. First, methodology development was required to identify a suitable method of inoculation for neck blast. To that aim, different inoculation methods, performed at different development stages, were compared. The overall results of two independent experiments indicate that (1) – both injection and cotton wool method allow producing neck blast, and (2) – infection and lesion expansion increase as inoculation takes place from flowering to maturity. Second, adaptation of M. Oryzae isolates to infection on specific organs (leaf or neck) was investigated by measuring monocyclic parameters on leaves and necks for isolates originating from both organs. Isolates originating from necks were more aggressive than isolates originating from leaves, when inoculations were performed on leaves as well as on necks. This may indicate that necks are infected by the most aggressive isolates infecting leaves. Third, the possibility of systemic infection between leaf and neck was explored. Field experiments were established in order to generate a range of disease epidemic onset and intensity on leaves in microfields. A fraction of the panicles were covered by bags before heading in order to prevent infection from airborne inoculum. Neck blast infections were observed on a fraction of the protected panicles. This result indicates the occurrence of systemic infection of the fungus from leaves to necks. The overall results obtained from this Ph.D. research provide additional insight in the relationships between leaf blast and neck blast. They further indicate that the leaf blast – neck blast pathosystem needs to be addressed as a whole system in order to better understand its dynamics and to improve its management.
  • ThesisItemOpen Access
    Cultural and molecular characterization of Rhizoctonia solani Kuhn isolated from various hosts and its management in urdbean [Vigna mungo (L.) Hepper] causing web blight
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-07) Neelam; Kushwaha, K.P.S.
  • ThesisItemOpen Access
    Studies on biotic induced resistance against Alternaria blight of mustard
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-03) Pandey, Vandana; Tiwari, A.K.
    Alternaria blight disease caused by Alternaria brassicae is one of the most important diseases of Indian mustard causing up to 47 per cent yield losses. The control of Alternaria leaf blight is exclusively based on the application of chemical pesticides but is not the long term solutions. Recently, researchers have focused on developing, long lasting, environmentally safe and effective biocontrol methods for the plant disease management. Among various mechanisms of biocontrol agents, induced resistance is one of the most dominant mechanism in managing plant diseases by increasing the activity of various defense related enzymes and non-enzymatic antioxidants. In addition, they have other benefits, including amelioration of intrinsic physiological stresses in seeds and alleviation of abiotic stresses. They can also improve photosynthetic efficiency, especially in plants subjected to various stresses. As a consequence, plants treated with beneficial microorganisms may provide greater yields by managing plant health. Among different solid media tested for growth and sporulation (spores/plate) of A. brassicae V8 rose Bengal medium (17× 105) was found best in terms of growth and sporulation followed by mustard seed extract (16.3 ×105). Among liquid media, mustard seed broth was found best in fresh mycelia weight (7.6 g) and maximum sporulation (11x102) spores/ml. Under glasshouse conditions maximum shoot and root length (cm) was observed in Th1+Th2 (115.6, 11.7) which was significantly different from control (93.3, 9.7) having minimum shoot and root length respectively at 70 DAS. Significantly minimum disease index (%) of Alternaria blight was observed in Th1+Th2 (23.7) followed by Pf (28.0) and Cf-Th2 (28.3), while significantly maximum in control (50.7) after 21 days of pathogen inoculation. Among various treatments evaluated for their efficacy in the induction of various defense related compounds and antioxidant enzymes, Th1+Th2 was found best followed by Cf-Th2 as they accumulated minimum H2O2 by increasing the activity of several antioxidant enzymes viz. APX, GPX, CAT, SOD, POD, LOX and PAL and amount of other non-enzymatic antioxidants viz. total ascorbate, reduced glutathione, total chlorophyll and Carotenoid.These treatments accelerated and increased the plant’s ability to activate the defense that was best adapted to resist the stress situation encountered Under glasshouse conditions during the study of physiological parameters, significantly maximum photosynthetic rate (μmoles CO2/m2/s), stomatal conductance (m moles/m2/s) and transpiration (m moles/m2/s) was observed in Th1+Th2 (12.2, 152.0, 1.2) followed by Cf-Th2 (11.8, 125.0, 0.8), while significantly minimum was in control (2.7, 38.0, 0.1) on 21st day respectively. Significantly maximum intracellular CO2 (ppm) was observed in Cf-Th2 (300.0) followed by Th1+Th2 (290.0), while significantly minimum in control (211.0). Significantly maximum SPAD value was observed in Th1+Th2 (24.0), while significantly minimum in control (6.0) on 21st day of the study. The SDS-PAGE protein profiling of mustard leaves obtained at different interval (3, 9, 15, and 21day) after pathogen inoculation in glasshouse showed higher intensity of the proteins bands within the range of 20.1-29KD and 29-43KD in Th1+Th2, Cf-Th2,Pf-Th1, Pf-Th2, and Cf-Th1 as compared to control. Under field conditions maximum shoot and root length (cm) and significantly minimum disease index (%) of Alternaria blight was observed in Th1+Th2 (222.7, 17.7, 50.9) followed by Pf (217.3, 16.3, 55.1),while in control (175.6, 13.3, 84.3) respectively.Among various treatments significantly maximum yield (q/ha) and seed test weight (g)was recorded in Th1+Th2 (19.4, 2.1), while minimum in control (13.9, 1.5) respectively. Per cent increase in yield over control was maximum in Th1+Th2 (39.07) followed by SA (37.09) and Pf+Th2 (35.76) over control. The above findings revealed that biocontrol agents played a major role in managing the pathogenic stress caused by A. brassicae by inducing resistance in to the host.
  • ThesisItemOpen Access
    Studies on characterization and management of Colletotrichum graminicola, the causal agent of anthracnose of sorghum
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-01) Rekha; Singh, Yogendra
    Anthracnose of sorghum is one of the destructive foliar disease, caused by Colletotrichum graminicola . Sorghum is a tropical plant belonging to the poaceae family and it is believed to have originated in northeast Africa, where it was domesticated about 3000-5000 years ago. The present investigation was carried out with the objective to study the Morpho–molecular characterization of C. graminicola isolates from Uttarakhand ,Evaluation of bio-control agents against the pathogen, evaluation of antifungal activity of plant extracts for control of disease, evaluation of fungicides for disease control,effect of amended soil extracts with different types of amendments against the pathogen in-vitro, Effect of different dates of sowing on severity of the disease,effect of soil solarization along with biocontrol agents against Colletotrichum graminicola in vivo, screening of the sorghum germplasm against the disease under artificially inoculated conditions.Analysis based on RAPD-PCR resulted in significant differences among C. graminicola isolates with differential similarity matrix. A relatively high level of variability (0.420 to 0.760%) was recorded among different isolates. The result of pair wise combinations indicated highest similarity (coefficient 0.760) between isolate Cg5 and Cg6 . Similarly isolates Cg2 and Cg3 exhibited high degree of similarity (coefficient 0.730). High degree of similiarity was also observed between Cg5 and Cg 8 (0.700). Among ten Trichoderma harzianum isolates tested in vitro for antagonism against the pathogen TH-43 was found best in inhibiting the radial growth by 77.77% followed by TH-31 (75.22%) and TH-12 (72.22%). Out of ten Pseudomonas fluorescens isolates tested in vitro for antagonism against the pathogen Psf-2 was found most effective in inhibiting the radial growth (66.67%) of the test pathogen followed by Psf-12(62.22%) and Psf-4 (61.11%).In plant extracts garlic (69.44%) was most effective in reducing the radial growth. Among chemicals Saaf, Quintal and Bavistin gave 100% inhibition of mycelial growth of fungus all concentrations (25, 50, 200 and 400 ppm).Among eight organic matter amended soil extracts tested for efficacy against the pathogen poultry manure was found best (26.66%) followed by orange peel(18.87%) and cow urine(16.59%) showed effectively against test pathogen. In field experiment three sprays of reduced the disease severity by garlic (32.24%).Among chemicals quintal was found most effective in reducing the disease severity by (62.93%). During both crop seasons, Late planted ( 30th July) both PC-6 and MP-Chari had lowest disease severity ( 32.78 % and 39.85 %), less infection rate (0.123 and 0.141) and AUDPC (580.7 and 781.48 mm2 ) while more yield (40.43t/ha) was obtained with early planted ( 1st July) PC-6. In soil solarization along with bio-control agents TH-43 was found highly effective in reducing the disease severity (29.83%) followed by TH-2(32.53%). Out of 100 germplasm screened, 11 were found resistant, 50 moderately resistant, 38 susceptible and 1 highly susceptible.