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Dr. Y. S. Parmar University of Horticulture & Forestry, Solan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Solan, was established on 1st December, 1985 with the objective to promote education, research and extension education in the fields of Horticulture, Forestry and allied disciplines. Late Dr. Yashwant Singh Parmar, the first Chief Minister and the architect of Himachal Pradesh perceived the importance of Horticulture and Forestry to develop and improve the State economy which led to the establishment of this University. Its history lies in erstwhile Himachal Agricultural College, Solan, established in 1962 and affiliated to the Panjab University. It became one of the campuses of Agriculture Complex of Himachal Pradesh University on its formation in 1970. Consequent upon the establishment of Himachal Pradesh Krishi Vishvavidyalaya in 1978, this campus became its Horticulture Complex and finally in 1985, assumed the status of a State University, being the only University in the country engaged exclusively in teaching, research and extension in Horticulture and Forestry. The University is located at Nauni in Solan District of Himachal Pradesh, 13 km from Solan on Solan-Rajgarh Road, at an elevation of 1300 metres above mean sea level. Solan town is situated on national highway (NH-22) and is well connected by train and bus services. The University has four constituent colleges, out of which, two are located at the main campus Nauni, one for horticulture and the other for forestry, having 9 and 7 departments, respectively. The third College i.e., College of Horticulture & Forestry is located at Neri in Hamirpur District on Nadaun-Hamirpur state highway, about 6 Km from Hamirpur town and is well connected with bus service. The college offers three Undergraduate Degree Programmes i.e. BSc (Hons.) Horticulture, BSc (Hons.) Forestry and B. Tech. Biotechnology and MSc degree programme in a few subjects. The fourth college i.e. College of Horticulture and Forestry, Thunag (Mandi) is located at Thunag District Mandi. This college offer BSc (Hons.) Horticulture and BSc (Hons.) Forestry degree programme. In addition, there are five Regional Research Stations, 12 Satellite Stations and five Krishi Vigyan Kendras (KVKs) situated in different zones of the State.

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20191
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Subject: Entomology × Author: SHARMA, PRIYANKA × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    STUDIES ON SPATIAL DISTRIBUTION AND PARASITIZATION POTENTIAL OF Aphelinus asychis Walker AGAINST GREEN PEACH APHID, Myzus persicae (Sulzer) IN BELL PEPPER
    (UHF,NAUNI, 2019-08) SHARMA, PRIYANKA; VERMA, S C
    ABSTARCT The present investigations entitled “Studies on spatial distribution and parasitisation potential of Aphelinus asychis Walker against green peach aphid, Myzus persicae (Sulzer) in Bell pepper” were conductedduring the year 2018-2019 at Dr. Y S Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh. During the study period, M. persicae and its parasitoid, A. asychis and A.matricariae populations followed negative binomial distribution throughout the season. Taylor’s power equation for M. persicae, A. asychis and A.matricariae were σ² = 6.97X1.531 (R2 = 0.931), σ² = 3.013X1.098 (R2 = 0.867) and σ² = 4.29X1.282 (R2 = 0.90) during 2018-2019, respectively. Iwao’s patchiness regression was X* = 45.12 + 1.333X (R2 = 0.853), X* = 1.485 + 1.375X (R2 =0.784) and X* = 5.406 + 1.195X (R2 =0.767) during 2018-2019, respectively. Optimum number of samples required for the green peach aphid, M. persicae, A. asychis and A.matricariae were 261.1, 332.5 and 474 during 2018-2019, respectively at 20 per cent precision level. The egg to adult emergence period, pre-oviposition period, oviposition period, post-oviposition period, fecundity, sex ratio (F:M) was 16.23±0.45, 1±0.00, 6.6±0.40, 1.6±0.40 days, 58.8 eggs/female, 1:0.97, respectively. The highest adult longeivity (male:16.5 and female:17.75 days) was observed with 70 per cent honey solution sand lowest with distilled water (male:8.75 and female:9.75 days). The true generation time (T), the true intrinsic rate of increase (rm), doubling time, finite rate of increase (λ) and the net reproductive rate of the parasitoid, A. asychis with second instar of M. persicae was 22.02 days, 0.16 females/female/day, 2.52 days, 1.174 feamles/day and 33.32 feamles/feamle, respectively. A. asychis parasitized 20.29 per cent during 2018-2019. A hyperparasitoid, Alloxysta victrix parasitizing A. asychis between 20.00 to 27.27 per cent was recorded during 2018-2019. A. asychis was able to parasitize all the nymphal instars of M. persicae with preference to the second instar (53%) followed by first instar (46%), third instar (44%) and fourth instar (33%). A. asychis exhibited a Type-II functional response to the second instar nymph of M. persicae with attack rate and handling time was 0.034 ± 0.004 h-1 and 1.32 ± 0.23 h, respectively for the Holling disc equation. Hence, A. asychis can be utilized as one of the components in the integrated pest management programme of green peach aphid, under protected condition in Himachal Pradesh. Signature of Major Advisor S