PG Thesis
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Item Effect of harvesting and growth regulator on seed yield qulaity and vigour in cucumber (cucumis sativus L.)(Department of Agronomy, College of Agriculture,vellayani, 2000) Sindhu, B; Annamma GeorgeHarvest, Farmyard manure ,Gibberellic acid ,Hectare ,Ethephon AbstractA field experiment was conducted at the College of Agriculture, Vellayani to study the influence of harvest and growth regulator on seed yield, quality and vigour and also to standardise the physiological stage of maturity in cucumber. Growth characters such as length of vine, number of branches and leaf area index were significantly influenced by vegetable harvests and these characters increased with increase in number of vegetable harvests. The bearing capacity of the plant is improved by frequent picking of green fruits, but the mature fruit yield and seed yield were significantly reduced. Highest seed yield was obtained when the plants were left for seed collection without green fruit picking. Seed quality is not influenced by number of harvests. But when the economics is considered highest net return and B : C ratio were obtained for two vegetable harvest. So to obtain maximum returns we can combine seed production along with two vegetable harvests which gives some vegetable yield and reasonably good yield of quality seeds. Growth regulator caused reduction in vine length. Number of branches was not influenced by growth regulator. But LA! showed a significant Increase. Growth regulator caused significant increase in green and mature fruit yields and seed yield. Fruit yield, seed yield and net return were highest at 200 ppm of ethephon. Seed quality was not affected by the application of growth regulator except for] 000 seed weight. Seed quality is significantly influenced by stages of harvest. Weight of seeds per fruit and quality were highest for seeds when fruits were harvested 45 days after flowering which was on par with that at 30 days after flowering. Storage of fruits intact before seed extraction also had significant effect on increasing seed quality. Seed quality was highest when the seeds were extracted after storing the fruits for nine days. Even when the fruits were harvested at immature stage (15 days after flowering) the seed weight per fruit and seed quality parameters can be increased by storing the fruits intact before seed extraction for nine days. But when the fruits were harvested at 30 and 45 days after flowering there was not much variation in seed quality by post harvest storage of fruit before seed extraction.Item Evaluation of clonal variation in banana musa spp. (aab group) 'rasthali'(Department of Fruit Science, College of Horticulture, Vellanikkara, 2018) Dhanyasree, K; Sobhana, AThe study entitled ‘Evaluation of clonal variation in banana Musa spp. (AAB group) ‘Rasthali’’ was carried out at Banana Research Station, Kannara during May 2017- July 2018 with the objective to conduct survey in central parts of Kerala and assess the natural variability in Rasthali clones of banana. Clones collected from Palakkad and Thrissur districts along with clones maintained at BRS, Kannara were planted in randomized block design with three replications. The clones were characterized based on IPGRI descriptor for banana. The analysis of variance revealed that significant variation for characters like plant height, plant girth, length of leaf, width of leaf, total leaf area/ plant, length of petiole, number of leaves and functional leaves, duration of vegetative phase, shoot to harvest duration, total crop duration, bunch length, bunch weight, number of hands/ bunch, number of fingers/ hands, fruit weight, fruit length, fruit girth, TSS, total sugars, sugar-acid ratio, fruit peel thickness, pulp-peel ratio and shelf life of ripe fruits at ambient conditions. Plant height, plant girth, total leaf area/ plant at bunch emergence stage and total crop duration were highest for Veneer Poovan and highest yield was obtained for Veneer Poovan, Valiya Poovan and Marthaman. Valiya Poovan recorded greatest fruit length, fruit girth and fruit weight. The quality parameters like TSS, total sugars and sugar- acid ratio were recorded highest in Marthaman whereas fruit peel thickness and shelf life were high in Andhra Poovan and, highest pulp- peel ratio in Veneer Poovan. Highest genotypic and phenotypic coefficients of variation were observed for fruit weight. High heritability coupled with genetic gain was observed in all characters except number of hands per bunch, bunch length and bunch weight. The character fruit weight with high value for GCV, PCV and heritability, coupled with genetic gain can be used for direct selection and further breeding programmes. Total crop duration, fruit length, number of fingers per hand, fruit weight, plant girth and fruit girth had showed positive direct effect on bunch weight per plant while, plant height, bunch length and number of hands per bunch showed negative direct effect on bunch weight. Organoleptic evaluation revealed that highest mean score for taste, texture, sweetness, flavour, colour and overall acceptability of fruits was in Marthaman which also recorded high TSS, total sugars, sugar- acid ratio and less acidity. Lowest mean scores for sweetness, flavour, overall acceptability and taste were observed in Cheriya Poovan. Score for colour and texture were minimum in Veneer Poovan. The present study revealed that, based on yield, quality parameters and organoleptic evaluation, Marthaman was the best.Item Evaluation of tropical plant species for use as cut foliage(Department Of Pomology And Floriculture, College Of Horticulture, Vellanikkara, 2003) Sindhu M Eapen; Rajeevan, P KThe investigations on the evaluation of tropical foliage plant species for use as cut foliage was conducted in the Department of Pomology and Floriculture, College of Horticulture, during 2001-2003, with the main objectives of evaluating the performance of the foliage species under field conditions together with their post harvest performance. Twenty-seven foliage plant species belonging to ten different families were selected for the present study. They were evaluated for their height, spread, leaf characters (length, breadth, area, longevity, interval of production, leaf yield per month) and petiole characters (length, girth) under field conditions. The post harvest performance of the cut foliage of these species was evaluated by various pulsing and holding treatments. The best of the treatments were combined and the selected species were evaluated in the combinations, also estimating the catalase activity at different stages of treatment. Cut foliages of the different species were also held at different temperatures to evaluate the influence of the temperature on the vaselife. They were packed in cartons using different lining materials (both dry and wet) and the effect of the lining materials were also evaluated. In the field conditions the species exhibited wide variation 111 their growth pattern and leaf characters. Maximu~ plant height was observed In Asparagus setaceus, a twiner, while the maximum spread was recorded 111 SchefJlera arboricola, a shrub and Nephrolepis cordifolia, a fern. Leaf length was maximum in Nephrolepis exaltata while the leaf breadth and petiole length were maximum in Cyperus alternifolius. Philodendron wendlandii recorded maximum petiole girth. Maximum leaf production was in Scirpus cernnus. Leaf area' recorded was maximum in Monstera deliciosa while SchejJl.era arboricola and Nephrolepis exaltata recorded the maximum longevity and maximum interval of leaf production, respectively. The qualitative characters of the species differed in all respects and a wide range of shape, texture, margin and pigmentation could be observed. In the post harvest evaluation for use as cut foliage, the pulsing treatments were on par and among the holding solutions, distilled water and acidified water proved to the best, thus eliminating the use of chemicals. Scoring of .foliage projected Asparagus setaceus to be the best in terms of all the characters of colour/pigmentation, shape/pattern, size and texture. The combinations indicated a significantly higher vase life of the different species in a combination of any pulsing treatment with a holding solution of either tap water or distilled water. Catalase activity reduced in the foliage when treated with hot water and increased when treated with tap water. Foliage kept in aoidified water after hot water dip showed an increase in the activity. pH in the best treatment showed a lesser increase whereas EC increased to a greater extent in the most inferior treatment. Storing at a lower temperature of 17°C proved to be better for prolonging the vase life of the foliage species, compared to ambient temperature. Packing with a wet cotton plug at the petiole end increased the vase life of the foliage although lining materials showed rio significant effect on the vase life.