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Acharya N G Ranga Agricultural University, Guntur

The Andhra Pradesh Agricultural University (APAU) was established on 12th June 1964 at Hyderabad. The University was formally inaugurated on 20th March 1965 by Late Shri. Lal Bahadur Shastri, the then Hon`ble Prime Minister of India. Another significant milestone was the inauguration of the building programme of the university by Late Smt. Indira Gandhi,the then Hon`ble Prime Minister of India on 23rd June 1966. The University was renamed as Acharya N. G. Ranga Agricultural University on 7th November 1996 in honour and memory of an outstanding parliamentarian Acharya Nayukulu Gogineni Ranga, who rendered remarkable selfless service for the cause of farmers and is regarded as an outstanding educationist, kisan leader and freedom fighter. HISTORICAL MILESTONE Acharya N. G. Ranga Agricultural University (ANGRAU) was established under the name of Andhra Pradesh Agricultural University (APAU) on the 12th of June 1964 through the APAU Act 1963. Later, it was renamed as Acharya N. G. Ranga Agricultural University on the 7th of November, 1996 in honour and memory of the noted Parliamentarian and Kisan Leader, Acharya N. G. Ranga. At the verge of completion of Golden Jubilee Year of the ANGRAU, it has given birth to a new State Agricultural University namely Prof. Jayashankar Telangana State Agricultural University with the bifurcation of the state of Andhra Pradesh as per the Andhra Pradesh Reorganization Act 2014. The ANGRAU at LAM, Guntur is serving the students and the farmers of 13 districts of new State of Andhra Pradesh with renewed interest and dedication. Genesis of ANGRAU in service of the farmers 1926: The Royal Commission emphasized the need for a strong research base for agricultural development in the country... 1949: The Radhakrishnan Commission (1949) on University Education led to the establishment of Rural Universities for the overall development of agriculture and rural life in the country... 1955: First Joint Indo-American Team studied the status and future needs of agricultural education in the country... 1960: Second Joint Indo-American Team (1960) headed by Dr. M. S. Randhawa, the then Vice-President of Indian Council of Agricultural Research recommended specifically the establishment of Farm Universities and spelt out the basic objectives of these Universities as Institutional Autonomy, inclusion of Agriculture, Veterinary / Animal Husbandry and Home Science, Integration of Teaching, Research and Extension... 1963: The Andhra Pradesh Agricultural University (APAU) Act enacted... June 12th 1964: Andhra Pradesh Agricultural University (APAU) was established at Hyderabad with Shri. O. Pulla Reddi, I.C.S. (Retired) was the first founder Vice-Chancellor of the University... June 1964: Re-affilitation of Colleges of Agriculture and Veterinary Science, Hyderabad (estt. in 1961, affiliated to Osmania University), Agricultural College, Bapatla (estt. in 1945, affiliated to Andhra University), Sri Venkateswara Agricultural College, Tirupati and Andhra Veterinary College, Tirupati (estt. in 1961, affiliated to Sri Venkateswara University)... 20th March 1965: Formal inauguration of APAU by Late Shri. Lal Bahadur Shastri, the then Hon`ble Prime Minister of India... 1964-66: The report of the Second National Education Commission headed by Dr. D.S. Kothari, Chairman of the University Grants Commission stressed the need for establishing at least one Agricultural University in each Indian State... 23, June 1966: Inauguration of the Administrative building of the university by Late Smt. Indira Gandhi, the then Hon`ble Prime Minister of India... July, 1966: Transfer of 41 Agricultural Research Stations, functioning under the Department of Agriculture... May, 1967: Transfer of Four Research Stations of the Animal Husbandry Department... 7th November 1996: Renaming of University as Acharya N. G. Ranga Agricultural University in honour and memory of an outstanding parliamentarian Acharya Nayukulu Gogineni Ranga... 15th July 2005: Establishment of Sri Venkateswara Veterinary University (SVVU) bifurcating ANGRAU by Act 18 of 2005... 26th June 2007: Establishment of Andhra Pradesh Horticultural University (APHU) bifurcating ANGRAU by the Act 30 of 2007... 2nd June 2014 As per the Andhra Pradesh Reorganization Act 2014, ANGRAU is now... serving the students and the farmers of 13 districts of new State of Andhra Pradesh with renewed interest and dedication...

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2015 - 20182
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Subject: Plant Pathology × Author: RANGA RANI, ATLA × Start date: 2000 ×
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    ThesisItemOpen Access
    STUDIES ON THE INTEGRATION OF CHEMICAL AND BIOLOGICAL METHODS FOR THE MANAGEMENT OF RICE STEM ROT DISEASE CAUSED BY Sclerotium oryzae Catt.
    (Acharya N.G. Ranga Agricultural University, 2018) RANGA RANI, ATLA; RAJAN, C.P.D.
    Stem rot of rice, caused by Sclerotia oryzae Catt. is a serious threat to rice production in India. Fungicides provide control of this pathogen but also have ill effects on the environment. In an attempt to develop better integrated strategies using fungicides and bacterial bio agents for management of stem rot disease, a total of eight isolates from different localities of Nellore district were isolated. The isolates of S. oryzae were designated as SO 1, SO 2, SO 3, SO 4, SO 5, SO 6 SO 7 and SO 8. Variability among these isolates of S. oryzae based on growth rate on PDA and also in utilizing various carbon sources was assessed using four different growth media. Depending on the growth rate on PDA medium, these isolates of S. oryzae could be categorised into four groups. Group 1 had the very fast growing isolate SO 3. Group 2 comprised of four isolates SO 1, SO 4, SO 6 and SO 7 which were fast growing. Group 3 consisted of the medium growing isolates i.e. SO 2, SO 8. Group 4 consisted of isolate SO 5 is very slow growing. Among the growth media tested, PDA was best supported for growth of all isolates and there was no growth of all the isolates of S. oryzae grown on CDA. Among the eight isolates, isolate SO 3 which was fast growing with abundant sclerotial production was selected for further studies. A total of thirteen antagonistic bacteria were isolated from rhizosphere soil of rice. Highest inhibition was recorded in case of RRB-2 (74.07%) followed by xiii RRB-4 with 70.73% inhibition, RRB-1 with 65.92% inhibition and RRB-3 with 62.22% inhibition. Least inhibition was observed with RRB-12 (31.84%) and with RRB-13 (33.31%). Four of these effective bacterial antagonists were used for further studies. Thirteen plant extracts, five plant essential oils and five natural preparation were tested for their bio efficacy against S. oryzae at different concentrations. The extract (powdered seeds) of Brassica juncea was found to be the most effective in inhibiting the growth of S. oryzae (100%) at 20 and 25% concentrations followed by rhizome extract of Curcuma longa (84.81) at 20% concentration, bulb extract of Allium sativum (84.44) at 2.0% concentration, leaf extract of Eucalyptus glubulus (76.29%). The bulb extract of Allium cepa recorded the least mean inhibition (4.40%) of S. oryzae at 5%. Out of the five essential oils, lemon grass oil showed 100 % inhibition of the test fungus at all tested concentrations. Spearmint oil at 1%, 1.5% and 2% concentrations and eucalyptus oil at 2% and 3% concentrations recorded 100% inhibition in the growth of S. oryzae. The mustard oil at 0.5% concentration recorded least inhibition (7.77%) followed by neem oil at 0.5% concentration with 19.25% inhibition in the growth of S. oryzae. Among the natural preparations, neemasthra was found to be the most effective in inhibiting the growth of S. oryzae (55.56%) followed by brahmasthra (49.66%), agniasthra (36.66%) and jeevamrutham (35.56). The neem seed kernel recorded the least mean inhibition (2.23%) of S. oryzae at 5000 ppm. Among the fifteen fungicides tested, Carbendazim, Propiconazole, Hexaconazole, Difenoconazole, Tebuconazole, Trifloxystrobin + Tebuconazole, Azoxystrobin, Isoprothiolane, Mancozeb + Carbendazim, Benomyl and Thiophanate-methyl completely (100%) inhibited the growth of S. oryzae at all concentrations in vitro. Thifluzamide (0.04%) recorded least per cent inhibition. Twelve fungicides were tested in vitro for the compatibility with potential biocontrol agents viz., RRB-1, RRB-2, RRB-3 and RRB-4. Isolate RRB-4 was found to be most compatible antagonistic bacteria as it has shown highest compatibility when compared to other isolates. Hexaconazole showed highest compatibility with all the four isolates followed by propiconazole. Effective fungicides and antagonistic bacterial isolates in in vitro studies were evaluated under field conditions. Results of pooled analysis of Rabi 2016-17 and early Kharif 2017-18 revealed that, among the fungicides, treatment Hexaconazole recorded lowest PDI. While among the bacterial antagonists, treatment Root dipping with RRB-4 + foliar spray showed less PDI after second spray. Hence, these two treatments were selected for further field trial during Rabi 2017-18 to evaluate the strategies involving the integration of effective fungicide and bacterial antagonist for the management of rice stem rot disease. Pooled analysis of the yield data revealed that the highest grain yield was recorded in Hexaconazole treatment (7.43 t/ha) followed by Difenoconazole (7.29 t/ha), Tebuconazole (7.19 t/ha), Root dipping with RRB-4+ foliar spray (6.97 t/ha), Carbendazim (6.91 t/ha) and Mancozeb + Carbendazim (6.89 t/ha). Least grain yield was xiv observed in untreated control (5.22t/ha) followed by Root dipping with RRB-3+ foliar spray (5.74 t/ha) which were statistically at par with each other. In case of straw yield, Hexaconazole treatment (7.22 t/ha) recorded highest straw yield followed by Difenoconazole; 6.88t/ha and Propiconazole; 6.84 t/ha which were statistically at par with each other. Least straw yield was observed in untreated control (5.47 t/ha). During Rabi 2017-18, the evaluation of the strategies of integration of effective fungicide Hexaconazole (0.2%) and the antagonistic isolate RRB-4, results revealed that, among the seven treatments consisting of different strategies, the following strategies were found superior. 1. Alternate sprays with hexaconazole and RRB-4 (40.00 PDI; 7.56 t/ha grain yield and 10.26t/ha straw yield). 2. Seedling dip with RRB-4 and two sprays followed by two sprays with hexaconazole (44.40 PDI, 6.95 t/ha grain yield and 8.53 t/ha straw yield). 3. Two sprays with hexaconazole followed by two sprays with RRB-4 (48.35 PDI, 7.37 t/ha grain yield and 7.73 t/ha straw yield).
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    ThesisItemOpen Access
    CHARACTERIZATION AND RHIZOSPHERE COMPETENCE OF TRICHODERMA SPP. FROM DIFFERENT CROPPING SYSTEMS IN CHITTOOR DIST
    (Acharya N.G. Ranga Agricultural University, Guntur, 2015) RANGA RANI, ATLA; KHAYUM AHAMMED, S
    Nine Trichoderma isolates were obtained from 27 rhizosphere samples collected from groundnut, redgram and tomato. Five isolates from groundnut rhizosphere soils, two isolates from redgram and two isolates from tomato crop grown in Chittoor dist. All isolates were grouped based on growth rate, isolates GRT-2, GRT-3, RRT-2 and TRT-2 were categorized as very fast growing, GRT-1, RRT-1 and TRT-1 as fast growing and GRT-4, GRT-5 as medium growing. Based on characters observed in cultural and microscopic studies, Trichoderma spp. was identified up to species level. Isolates GRT-2, GRT-4, GRT-5 identified as Trichoderma virens, RRT-1 and GRT-3 as Trichoderma harzianum. TRT-2 and RRT-2 as Trichoderma asperillum. Isolates GRT-1 and TRT-1 as Trichoderma longibrachiatum and Trichoderma pseudokoningii respectively. In dual culture studies against major soil borne plant pathogens viz., Sclerotium rolfsii, Aspergillus niger, Rhizoctonia solani, Macrophomina phaseolina, Fusarium oxysporum showed that GRT-3 isolate was found to be effective against Aspergillus niger and Fusarium oxysporum. Isolate TRT-1 was found to be effective against Scerotium rolfsii and TRT-2 was effective against Rhizoctonia solani and Macrophomina phaseolina. Among nine isolates of Trichoderma spp. isolate GRT-3 recorded highest optical density of 0.290, 0.130, 0.260 in terms of production of chitinase, β-1,3 glucanase and cellulase. Molecular characterization for all isolates by PCR- RAPD showed that, out of 15 primers from OPA and OPM series 9 primers were gave reproducible and scorable band with high percentage of polymorphism. A total of 207 amplification products were obtained, out of which 196 were polymorphic. The maximum polymorphism was observed in PCR reaction with OPA-01, OPA-03, OPA-05, OPA-09, OPA-10, OPM-04 and OPM-20. These similarity co-efficients were subjected to Unweighted Pair Group Method on Arithmetic average (UPGMA) and a dendrogram was drawn using SPSS package. The prominent outcome of this analysis is that the Trichoderma isolates clustered into two major groups, first group having GRT-4, GRT-5, GRT-3 and TRT-1 in one cluster and remaining isolates GRT-1, GRT-2, RRT-2, TRT-2 and RRT1 in other cluster which in turn grouped into two sub-clusters separating isolates GRT-1, GRT-2 formed one group and RRT-2, TRT-2 and RRT-1 formed another group. Based on characterization and bio-efficacy of all the isolates of Trichoderma spp. GRT-3 was found to be effective and its rhizosphere colonization in soils collected from groundnut, redgram and tomato crops were studied up to 15 days of sowing. Among all crops tested, redgram plant yielded the highest rhizosphere populations of antagonist GRT-3 i.e. 28 and 35 x 108 cfu/g of soil at 15 DAS in both natural and autoclaved soil respectively. The extent of rhizosphere colonized by Trichoderma isolate GRT-3 in other crops in descending order of rhizosphere competence was 25 and 31 x 108 cfu/g of soil, 22 and 28 x 108 cfu/g of soil in natural and autoclaved soils of tomato and groundnut respectively at 15 DAS. There was less rhizosphere populations of Trichoderma isolate (GRT-3) when it was applied to crops which were grown in natural soil as compared to autoclaved soil.