Thumbnail Image

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.

Browse

2005 - 20092
Reset filters
Subject: Plant Pathology × Author: Khulbe, Anjani × End date: 2017 ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Studies on Colletotrichum falcatum Went., causal agent of red rot of sugarcane with special reference to variability and host resistance
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2005-05) Khulbe, Anjani; Saxena, S.C.
    Red rot of sugarcane caused by Colletotrichum falcatum Went. is a serious and wide spread disease of sugarcane. Investigations were undertaken to study the variability among the different isolates of fungus causing red-rot of sugarcane.. Observations were recorded in various laboratory and field trials for studying the variability and host resistance against pathogen. The symptoms were observed a withered top, shriveled, wrinkled and reddening of pith with characteristic bands of clean white areas. mid rib of leave is also affected by the fungus, red patches with ash colour develop on the mid rib. Based on the study of the symptoms, the infected plants in the experimental crop area were easily identified and diagnosed having varied degree of infection and severity. Eight different isolates were taken from different sugarcane growing areas to study the growth pattern of the pathogen, Colletotrichum falcatum on different media, different pH, temperature and light conditions. The difference among the eight isolates of C. falcatum was studied in respect of growth and colony characters on oat meal agar. All the isolates showed septate mycelium and conidia were falcate, non-septate and hyaline. Chlamydospores were also formed in most of the isolates. Among the different isolates (K1, K2, K3, K4, 08, 09, B1 and P1) K1 showed fastest growth rate while isolate B1 was slowest. Studying the growth rate in different media Oat meal agar medium was found to be the best for all the isolates. The growth rate of all the isolates was favoured by neutral pH (pH 7) and temperature around 300C in oat meal agar medium. Exposure to different period of light showed no significant difference on the growth rate of the fungus. Of the fifty-six sugarcane genotypes, fifty-one were found to be resistant, four moderately resistant and one showed moderately susceptible reaction in the ratoon crop. in the direct planted sugarcane genotype evaluation trial fifty were found to be resistant, five moderately resistant and one moderately susceptible.
  • Thumbnail Image
    ThesisItemOpen Access
    Variability in Alternaria brassicae (Berk.) Sacc., the causal agent of black spot of rapeseed mustard and evaluation of different components of host resistance
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2009-12) Khulbe, Anjani; Awasthi, R.P.
    The oilseed crops especially rapeseed -mustard play a pivotal role in agricultural economy of the world. The yield potential of these crops is affected by a number of diseases. Among them, Alternaria blight caused by Alternaria brassicae (Berk.) Sacc., is most important. Control of this disease through chemicals is quite expensive, needs extra labour and also not ecofriendly. Thus one of the major challenges of research on rapeseed mustard is to develop the knowledge about the variability of A. brassicae in terms of cultural, morphological, nutritional; biochemical and induction of resistance that can minimize the losses caused by A. brassicae and help to stabilize the mustard production. The present investigation were carried out with objectives (1) to find out the extent of variation in growth rate (in vitro) among isolates of A. brassicae. (2) to find out whether the growth rates of A. Brassicae isolates in vitro is indicative of variation in aggressiveness and pathogenicity. (3) to find out the trade-off between growth rate and spore production. (4) grouping of different isolates according to preestablished groups (A, C, D) and on other, based on variation in growth and sporulation and aggressiveness. (5) to study the phenomenon of cross-protection using different combination of virulent and less virulent strains of A. brassicae. (6) to study the effect of abiotic inducers on induced resistance against A. brassicae. (7) to study comparative differences in biochemical constituents (nitrogen, proteins, phenol, sugar, etc.) in inoculated and uninoculated Brassica spp. Eighty eight isolates of A. brassicae were collected and grouped into twenty on the basis of type of symptom, growth rate, sporulation and colony characters. Isolate ABD, ABI, ABJ, ABN, ABQ, and ABT were fast growing; ABD, ABK and ABT have maximum spore body length; ABL and ABT had maximum beak length; ABL had high sporulation and isolate ABM had maximum germination of conidia. Percent germtubes per conidia was maximum in ABM and lowest in ABQ. RLEA medium supported the maximum growth and sporulation of all the isolate. The ratio of spore body length to spore beak length varied from 0.7 to 2.3. Percent spore germination varied from 10 to 80%. Most suitable temperature for growth and sporulation of all isolates was 200C and 250C. Most suitable pH for growth was 6.0 and 7.0 for most of the isolates. RLEB liquid medium supported maximum growth of all the isolates. Twenty isolates of A. brassicae showed difference in their pathogenic behaviour on different B. juncea cultivars. Minimum incubation period was in ABD isolate showing more virulence and showed maximum average number of spots as well as maximum size of spot in Varuna and Kranti. Culture filtrates of isolate ABD, ABI, ABJ and ABT showed very low seed germination and low plumule, radical length and maximum disease reaction. Four categories viz. least virulent, mildly virulent, virulent and highly virulent, were formed with virulence index. According to this, isolate ABA, ABM and ABO were least virulent; ABD, ABI, ABJ and ABT were highly virulent. Nitrogen and protein content were more in susceptible genotypes and was highest in uninoculated disease free condition. Phenol content was higher in resistant genotype and it increased with age. Total sugar content was high in resistant genotypes and disease free plants. It decreased with increase in age. Resistant and disease free genotypes contained higher content of reducing sugar and non- reducing sugar. Among the Brassica cultivars, B. rapa had highest and B. alba cultivar had low disease severity at 60 DAS. B. juncea cv. PHR-1 showed very less disease severity at 60 and 90 DAS. B. rapa cultivars showed high disease severity on pods at 90 DAS. No disease on pods was observed in case of PHR-1 (B. juncea), PBN-9501, GSL-1 (B.napus), PPCS-1 (B. carinata) and PPBA-1 (B. alba). Maximum disease was at 30-60 cm height at 60 DAS. Disease at 90 DAS increased upto 90 cm. In B. rapa high disease severity was at 90- 120 cm. Varuna and Kranti gave highest average yield. B. alba (PPBA-1) had a very low seed yield but had highest 1000 grain weight. Size of spots increased from 60 to 90 DAS. It was found to be smallest in PPBA-1 (B. alba) and largest in Kranti (B. juncea). Prior inoculation of least virulent isolate and mildly virulent isolate reduced the disease caused by virulent isolate. Salicylic acid gave reduced number of spots and average disease score against least virulent, mildly virulent and virulent isolates of A. brassicae.