Thumbnail Image

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...

News

https://angrau.ac.in/ANGRU/Library_Resources.aspx

Browse

20191
Reset filters
Author: ANAND KUMAR, A. D. V. S. L. P. × Start date: 2018 × Type: Thesis × Thesis Type: Ph.D ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    INSECTICIDE INDUCED RESURGENCE OF RICE BROWN PLANTHOPPER, Nilaparvata lugens (Stal) (Hemiptera:Delphacidae) AND MANAGEMENT WITH CERTAIN INSECTICIDES
    (Acharya N G Ranga Agricultural University, Guntur, 2019) ANAND KUMAR, A. D. V. S. L. P.; RAMA RAO, C.V.
    Indiscriminate use of insecticides is leading to resurgence of insect pests in various crops. Rice brown planthopper management has become very difficult due to its ability to develop resurgence to different insecticides regularly used by the farmers. Keeping this in view studies were initiated to find out the insecticides causing resurgence and their effect on biology of brown planthopper and also reasons for resurgence. Studies were also conducted to find out the effective insecticide rotations for management of BPH during kharif and rabi 2017-18. Information generated on insecticide usage pattern adopted by the rice growers revealed that calendar based sprays irrespective of pest and disease incidence, use of non-recommended synthetic pyrethroids for controlling insect pests, application of insecticides at higher doses than the recommended level, mixing more than one pesticide (cock tails) to control insect pests and diseases simultaneously and defective spraying etc. are some of the practices followed by the rice growers contributing to the resurgence of brown planthopper infesting rice. Brown planthopper had two peaks with first peak during 41st SMW (i. e., second week of October 2016) followed by second peak during 43rd SMW (i. e., fourth week of October 2016) during kharif 2016. During rabi 2016-17, the activity of BPH was found initially low during 7th SMW (February 12-18) and gradually increased during successive standard weeks (8th-14th SMW) and reached the highest number during 14th SMW (i.e., first week of April). The incidence of WBPH attained peak initially during 38th SMW (September 17-23) and later during third week of October (42nd SMW) during kharif 2016, while in rabi 2016-17 first WBPH was noticed during 7th SMW (February 12-18) and population increased gradually during successive weeks and attained peak number during 13th SMW (March 26-April 1). Brown planthopper had significant negative relationship with morning relative humidity of current week and sunshine hours of two weeks earlier but positive correlation with evening relative humidity two weeks earlier in kharif 2016. Maximum and minimum temperatures (current week, one week and two weeks xviii earlier) and evening relative humidity two weeks earlier in rabi had significantly positive impact on population of BPH. White backed planthopper had significant negative relation with morning relative humidity of current week during kharif 2016. None of the abiotic factors has showed significant relationship with activity of WBPH during rabi 2016-17. Field population of both BPH and WBPH had a positive relationship with light trap catches of planthoppers. The field populations of BPH and WBPH are in the proportion of 69.00 per cent and 31.00 per cent, respectively during kharif 2016 and 98.00 per cent and 2.00 per cent, respectively during rabi 2016-17. Among fourteen insecticides screened in field during kharif and rabi 2016-17 for induction of resurgence in BPH, seven insecticides viz., chlorpyriphos, profenophos, deltamethrin, cypermethrin, bifenthrin, lambda cyhalothrin and imidacloprid significantly increased the population of N. lugens over untreated check and consequently resulted in higher resurgence, whereas the remaining i.e., acephate, monocrotophos, cartap hydrochloride, fipronil, chlorantraniliprole, buprofezin and pymetrozine can be used judiciously, with periodic monitoring for development of resistance and induction of resurgence. The resurgence inducing mechanism of seven identified insecticides was studied in detail in green house experiments. The results revealed that out of seven insecticides applied at two doses (half of the recommended field dose and recommended field dose), four insecticides viz., cypermethrin, deltamethrin, bifenthrin and lambda cyhalothrin significantly enhanced the reproductive rate (153.67 to 227.67 nymphs / 2 females) of N. lugens and consequently resulted in higher resurgence ratio (1.17 to 1.74 folds). Increase in feeding index (144.33 mm2 to 496.00 mm2 honey dew area), growth index (6.35 % to 7.11 %) and sex ratio in favour of females (1.39 to 1.84 females per 1 male) were the additional factors contributing to the resurgence in the population of the brown planthopper caused by the application of synthetic pyrethroids. While chlorpyriphos, profenophos and imidacloprid resulted in brown planthopper resurgence through changes in the nutritional quality of the host plant that may favour the phytophagus herbivores as indicated by the increased feeding indices (135.33 mm2 to 326.33 mm2 honey dew area). The results obtained from both field and green house experiments in the present investigation revealed that insecticide induced resurgence in the populations of brown planthopper is due to the direct stimulatory effect on the reproductive potential of the insect, indirect effect through favourable changes in the nutritional quality of rice plant and selective destruction of natural enemies. Field experiments carried out during kharif and rabi 2017-18 revealed that fipronil (1000 ml ha-1) followed by pymetrozine (300 g ha-1), buprofezin (800 ml ha-1) followed by pymetrozine (300 g ha-1) and acephate (750 g ha-1) followed by pymetrozine (300 g ha-1) were the most effective insecticide rotations in the management of brown planthopper and recorded higher grain yields. With regard to cost benefit ratio, insecticide rotations, acephate (750 g ha-1) followed by pymetrozine (300 g ha-1) and fipronil (1000 g ha-1) followed by pymetrozine (300 g ha-1) had the highest cost benefit ratio of 1: 6.01 and 1: 6.03, respectively. Buprofezin (800 ml ha-1) followed by pymetrozine (300 g ha-1) and fipronil (1000 ml ha-1) followed by dinotefuran (250 g ha-1) are the next best rotations with cost benefit ratioof 1: 5.87 and 1: 5.07, respectively.