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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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20201
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Subject: Entomology × Author: GAIKWAD MAHESH BALASO × Start date: 2019 × Type: Thesis × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    APHID-NATURAL ENEMY DIVERSITY IN HORTICULTURAL CROPS OF HIMACHAL PRADESH AND EVALUATION OF DOMINANT PREDATORS AGAINST ROSE APHID, Macrosiphum rosae L
    (NAUNI,UHF, 2020-10) GAIKWAD MAHESH BALASO; VERMA, SUBHASB CHANDER
    ABSTRACT The present investigation entitled “Aphid-natural enemy diversity in horticultural crops of Himachal Pradesh and evaluation of dominant predators against rose aphid, Macrosiphum rosae L.” conducted during the year 2018-2020 at Department of Entomology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan, Himachal Pradesh. A total 24 aphid species belonging to 16 genera infesting different horticultural crops were recorded from four agroclimatic zones of Himachal Pradesh. A total of 40 natural enemies belonging to 29 genera were recorded on these aphids. The Zone-II contributed maximum diversity of aphid species (19) as well as natural enemies (38) followed by Zone-I. The diversity indices of aphid and their natural enemies were also maximum in Zone-II. The seasonal abundance of rose aphid, M. rosae was relatively low in first two months (February and March) and negligible in mid of the cropping season, while the peak was recorded in the last three months (October to December) during both the years. The correlation was worked out between rose aphid population and weather parameters during the year, 2018 revealed significantly negative correlation with maximum temperature (Tmax r=-0.482) and minimum temperature (Tmin r=-0.597) whereas, other weather parameters such as morning relative humidity RHm (r=-0.203), evening relative humidity RHe (r=-0.199) and total rainfall (Rf) (r=-0.236) showed the non significant negative correlation (P=0.05). Similarly, during 2019, rose aphid recorded highly significant negative correlation with maximum temperature (Tmax r=-0.299) and minimum temperature (Tmin r=-0.404) whereas, RHm (r=0.121), RHe (r=0.022) exhibited non significant positive correlation and total Rf (r=-0.072) showed the non significant negative correlation. The rose aphid population exhibited significant positive correlation with Coccinella septempunctata, Hippodamia variegata, Oenopia sauzeti and Oenopia sexareata whereas with Oenopia kirbyi exhibited negative correlation during 2018 whereas, during 2019, rose aphid population exhibited significant positive correlation with predators. Among the predatory coccinellids, C. septempunctata was recorded as voracious feeder on rose aphid, M. rosae followed by H. variegata, O. sexareata, O. kirbyi and O. sauzeti during grub as well as adult stages. The number of aphids consumed by larval instars, adult female and adult male of C. septempunctata H. variegata, O. sexareata, O. kirbyi and O. sauzeti consumed on an average 189.90, 115.10, 90.50, 89.20, 90.30 and 1074, 679.83, 602, 560.16, 548.83 and 986.33, 519.5, 539.66, 491, 488.75 aphids, respectively. All the predators i.e. C. septempunctata, H. variegata, O. sexareata, O. kirbyi and O. sauzeti exhibited the type-II functional response. The attack rate increased and handling time decreased with the successive developmental stages of the predators. Among the all predators, C. septempuctata and H. variegata exhibited the maximum demographic parameters indicating effective biocontrol agent. Hence, among predators C. septempuctata and H. variegata possesses good attributable qualities of biocontrol agents these can be exploited as a biocontrol agents of rose aphid, M. rosae as one of the componentsin integrated pest management under mid-hill conditions of Himachal Pradesh.