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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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20241
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Subject: Seed Science and Technology × Author: ARUSHI PADIYAL × End date: 2024 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    STUDIES ON THE EFFECT OF DEFENSE PRIMING AND BIOPRIMING ON QUALITY SEED PRODUCTION IN ONION
    (UHF Nauni, 2024-03-26) ARUSHI PADIYAL; Dr Narender K Bharat
    The present study entitled “Studies on the effect of defense priming and biopriming on quality seed production in onion” was carried out in the Department of Seed Science and Technology, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.) during 2021-22 and 2022-23. Three experiments were conducted using onion cv. Palam Lohit. In the initial screening experiment, onion seeds were primed with different concentrations and time durations of plant defense activators, silicon, salt solutions, fungal and bacterial biocontrol agents. Based on germination (%), speed of germination, seedling length (cm) seedling dry weight (mg), SVI-I and SVI-II and seed microflora (%), including Alternaria spp., Fusarium spp., Penicillium spp. and Aspergillus spp., most promising treatment was meticulously selected to proceed to the subsequent stages of the study. In the second experiment, the seeds primed with the best selected treatments from screening studies along with their combinations viz., plant defense activator with salt solution and fungal biocontrol agent with bacterial biocontrol agent were sown in nursery. Total emergence (%), speed of emergence, seedling height were observed highest in the treatment salicylic acid @50ppm+potassium nitrate @ 1.5%/12hours followed by T. harzianum+P. fluorescens/8hours and lowest incidence of diseases like damping off (%) and virus (%) was recorded in the treatment in T. harzianum+P. fluorescens/8hours salicylic acid @50ppm+potassium nitrate @ 1.5%/12hours. In the third experiment, uniform seedlings from best performing treatment in the nursery were transplanted in the field and observed for plant height, bulb weight, bulb equatorial and polar diameter, bulb yield per plot, per hectare and days to bulb harvesting along with the incidence of diseases like purple blotch, downy mildew, stemphylium blight, bacterial soft rot, fusarium basal rot, virus etc. in the bulb crop. The bulbs were harvested, stored, and replanted for seed crop in the next season and subjected to three foliar applications of the respective priming treatments, at bolting stage, flower initiation stage and seed development stage and observed for the parameters like days to 50% flowering, days to seed harvesting, number of seeds per umbel, seed yield per plant, per plot and per hectare recorded highest in the treatment salicylic acid @50ppm+potassium nitrate @ 1.5%/12hours+3FS followed by T. harzianum+P. fluorescens/8hours+3FS; along with the per cent disease control of diseases like purple blotch, downy mildew, stemphylium blight, botrytis rot and virus recorded lowest in the treatment T. harzianum+P. fluorescens/8hours+3FS followed by salicylic acid @50ppm+potassium nitrate @ 1.5%/12hours+3FS. The seeds were harvested and assessed for seed quality parameters and seed microflora Thus, it can be concluded that priming of onion seeds with salicylic acid @ 50ppm + potassium nitrate @ 1.5% for 12hours or T. harzianum+ P. fluorescens for 8hours before sowing in nursery and applying three foliar sprays at bolting stage, flower initiation stage and seed development stage enhanced plant growth, bulb and seed yield parameters, reduced the incidence /severity of diseases like purple blotch, downy mildew, stemphylium blight, botrytis rot and virus etc. along with enhancing the seed quality parameters and reducing seed microflora (%) of the harvested seeds, and being economical, thus, making these practices recommendable for onion cultivation.