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Theses

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2017 - 20192
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Subject: Fruit Science × End date: 2019 × Start date: 2017 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Response of biofertilizers on growth, yield and quality of strawberry (Fragaria × ananassa Duch.)
    (CCSHAU, 2019) Anuradha; Goyal, R.K.
    The present experiment entitled Response of biofertilizers on growth, yield and quality of strawberry (Fragaria × ananassa Duch.) was conducted at Hi-tech greenhouse and Post-harvest Laboratory of the Department of Horticulture, CCS Haryana Agricultural University, Hisar (Haryana) during the year 2016-17 and 2017-18 to find out the best bacterial strain that enhanced the growth, yield and quality of strawberry and minimize the disease incidence in fruits. The data were recorded on plant height, number of leaves per plant, plant spread, crown diameter, fresh weight of plant, dry weight of plant, number of runners per plant, number of fruits per plant, fresh weight of fruit, length and breadth of fruits, yield per plant, moisture content in fruits, total soluble solids, titratable acidity, ascorbic acid content and anthocyanin content. The recorded data were subjected to statistical analysis using Completely Randomized Design (factorial). The strawberry plants were inoculated with different strains of Bacillus and Pseudomonas and their combination and all the rhizobaterial inoculated plants fertilized with 75% RDF. Different strains of Bacillus and Pseudomonas had significant effect on growth, yield and quality of strawberry. The results indicate that strawberry plants fertilized with 100% RDF significantly increased growth, yield and quality of strawberry, however plants inoculated with Bacillus strain HCA61 and Pseudomonas strain CP109 were potent in increasing all growth and yield parameters whereas, among quality parameters maximum TSS was observed in Bacillus strain RCA3 and maximum ascorbic acid content and anthocyanin content was observed in Bacillus strain SYB101, and plants inoculated with Pseudomonas strain CP109 produces maximum TSS, minimum titrable acidity, maximum ascorbic acid content and anthocyanin content of fruits. The minimum disease incidence in fruits, i.e., gray mould and fruit rot was observed in plants supplied with Bacillus strain HCA61. The strains CP109 + HCA61 and MHA75 + HCA61 showed best results for growth, yield and minimum disease incidence.
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    ThesisItemOpen Access
    Studies on chemical thinning for quality improvement in Japanese plum (Prunus salicina Lindl.) cv. Kala Amritsari
    (CCSHAU, 2017) Rajput, Vinita; Bhatia, S.K.
    The present investigations entitled “Studies on chemical thinning for quality improvement in Japanese plum (Prunus salicina Lindl.) cv. Kala Amritsari”, was carried out on the eleven year old plum trees planted at a spacing of 6 m x 6 m at experimental farms of Department of Horticulture, Chaudhary Charan Singh Haryana Agricultural University, Hisar during the year 2014-16. The three individual experiments, viz. foliar application of GA3 for flower inhibition, chemical blossom thinning and chemical fruitlet thinning were performed. GA3 at 25, 50, 75 and 100 ppm was spayed before the leaf fall stage in year 2014. The blossom thinning chemicals, urea (4 & 6%), ATS (2 & 4%) and NAA (20 & 40 ppm) were spayed at full stage. The fruitlet thinning chemicals, thiourea (2.5 & 5%), NAA (50 & 100 ppm) and ethephon (50 & 100 ppm) were sprayed after fruit set when the fruits attained pea size. The observations regarding, flowering, fruiting and fruit quality parameters were recorded at different time during the year 2015 and 2016. The application of GA3 at 100 ppm was found most effective in reducing crop load (49.22% and 44.02% reduction in flowering) and increased fruit weight (15.68 g) followed by GA3 applications at 75 ppm as compared to control. Quality parameters (TSS, TSS/acid ratio, sugars etc.) were recorded highest in 75 ppm GA3 treatment. The blossom thinning with ATS at 4% resulted in minimum number of fruits per shoot (32.64, 28.11) and thereby increased fruit size (24.87 mm & 22.82 mm length) and quality parameters followed by ATS treatment at 2%. Among the chemicals used for fruitlet thinning, ethephon at 100 ppm (20.74, 18.27) followed by ethephon at 50 ppm (22.13, 21.00) resulted in minimum number of fruits per shoot and the fruit quality parameters (TSS- 14.65%, 13.70%) were found to be maximum with the application of ethephon at 100 ppm followed by application of NAA at 100 ppm and ethephon at 50 ppm. All the chemical thinning treatments significantly reduced the crop load on tree, increased leaf to fruit ratio, leaf area, fruit weight, fruit size and improved fruit quality, but reduced total yield as compared to control in both the years.