Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"leaf removal"”.
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Refining Fruit-Zone Leaf Removal for Red-Fruited Bordeaux Grape Varieties Grown in a Humid Environment
… in the eastern US aims for 1-2 basal shoot leaf layers after fruit set to limit fungal disease and sunburn incidence, and prevent extreme heating of grapes. The goal of this work was to assess if fruit-zone leaf removal to an uncommonly greater extent, and/or at an earlier phenological …
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Effect of vineyard management of Cabernet Sauvignon (Vitis vinifera L.) grape glycosides
… averaged 3.2, 5.1, and 6.4 kg/vine resulting in leaf area to fruit weight ratios (cm²/g) of 34.4, 27.0 and 19.2, respectively. Red-free GG was greatest in juice from fruit of the low treatment at four of seven sampling dates, including harvest. Phenolic glycosides were found to comprise as much …
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Influence of nitrogen rate, harvest frequency, lower leaf management, and chemical topping on mammoth cultivars of flue-cured tobacco
… traits and chemical constituents of the cured leaf. Field experiments were conducted at the Southern Piedmont Agricultural Experiment Station near Blackstone, Virginia in 1987 and 1988 to determine the influence of nitrogen rate, harvest frequency, and time and number of basal leaf removal on …
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Estrategias de optimización de la calidad de vinos blancos en la D.O.Ca. Rioja
… of different agronomic (early and late leaf removal) and oenological (cryomaceration) practices on the final quality of varietal white wines. The results obtained confirmed important differences in the agronomic and oenological behaviour of white varieties studied. The effects of leaf …
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Epidemiological studies and sustainable approaches for the control of strawberry powdery mildew
… overwintering inoculum and evaluate post-winter leaf removal for the control of early-season primary infection; and (v) to develop a management strategy by limiting synthetic fungicides to early-season applications and evaluating the performance of alternative products post-flowering. Disease …
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Effect of canopy manipulation on rot incidence and rot metabolites of White Riesling (Vitis vinifera L.) grapes
… grapes grown on two training systems. Selective leaf removal generally increased sunlight penetration into the grapevine canopy. The incidence of Botrytis and sour rot as well as the concentrations of rot organism metabolites in harvested fruit were reduced by leaf removal. The effect of grape …
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PALISSAGE: AN ALTERNATIVE TO MECHANICAL HEDGING IN VITIS VINIFERA VINEYARDS
… growth, resulting in a cycle of hedging and leaf removal that costs growers time and money. Palissage is an alternative canopy management tool where long shoot tips were tucked or wrapped horizontally along the top of the canopy. Anecdotally, growers report that palissage initiated earlier …
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The effect of viticultural and oenological treatments on fruit and wine composition of Chardonnay musqué /
… of Chardonnay musque Study I: Effect ofveraison leafremoval and cluster thinning A one-year study was performed analysing die effects of leaf removal, cluster thinning, yeast strain selection, and enzyme usage on the chemical composition and sensory properties of Chardonnay musque wine. A number …
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Comparison of enclave and individual employment of individuals with mental disabilities within college grounds departments
… supervisor that are involved in litter control, leaf removal, weeding, and snow removal. This method of employment has provided permanent employment for ten IMD. VPI & SU’s success with enclave employment prompted the development of first a statewide, then a national survey to determine the …
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Sunlight'S Influence On Grapevine Powdery Mildew: Direct Effects On Pathogen Development And Attendant Consequences Of Canopy Management And Vineyard Variability
… pruning level, training system, basal leaf removal, and irrigation regime, can also significantly affect the development of powdery mildew.
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Japanese beetle Popillia japonica Newman: foliar feeding on wine grapes in Virginia
… In a separate experiment with 0, 10, 20, and 33% leaf removal, no relationship was shown between leaf area loss and soluble solids, total titratable acidity or pH. Data from one season of damage by the beetle indicate that control measures may not be warranted in some years. In a third experiment, …
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The effects of vineyard management and primary and secondary fermentations on grape glycoconjugates and conjugate fractions
… and 30 shoots per meter) with and without basal leaf removal (2-4 leaves per shoot) were established on mid-wire (90 cm), bilateral cordon-trained, mature Cabernet Sauvignon (Vitis vinifera L.) grapevines in eastern Virginia in 1996 to determine the effects on grape chemistry, glycoconjugates, …
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Exploring the chemical properties of polyphenols in cold-hardy grape cultivars
… by vineyard management techniques, such as leaf removal. For instance, increasing sunlight exposure to grape clusters through these canopy management techniques can reduce acidity and may enhance polyphenol development. While the effects of these techniques on V. vinifera grapevines have …
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The effect of irradiance on the activation state of ribulose bisphosphate carboxylase in soybean leaves
… Initial RuBP Case activity (IA), present in a leaf extract prepared at 0°C and assayed without prior activation, was used as an estimate of in vivo activity. Total activity (TA) was measured in leaf extracts after full activation in high levels of CO₂ and Mg²⁺. Observed large variations in RuBP …
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Viticultural techniques of canopy management to mitigate the effects of global warming
… late winter pruning (LWP). In addition, basal leaf removal (LR), a wildly used cultural technique, was also studied in order to evaluate the impacts on grape and wine characteristics. The results show that SST could delay grape ripening by two to three weeks, however, under conditions of low …
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Effect of canopy manipulation and fermentation on grape aroma components
… grapes grown on two training systems. Selective leaf removal increased sunlight penetration into the grape canopy but generally did not influence FVT. However, PVT was frequently higher in the leaf-pulled fruit including four of six commercial harvest dates. The total quantity of the bound …
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The effects of leaf harvesting on the morphology, reproduction and sap production of the Cape Aloe (Aloe Ferox)
… tapping. Leaves from only the lower third of the leaf rosette ( 10 - 15 leaves) are harvested, and 2 - 4 cm at the base of the leaves are left to prevent damage to vascular tissues (Newton and Vaughan 1996, Mac Farlane 2004). Populations are only harvested every 18 - 36 months allowing plants to …
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Estrategias de uso de Saccharomyces cerevisiae en fermentaciones aeróbicas
… crop management to avoid ripening delays (like leaf removal, soil management, or crop relocation) (Stoll et al., 2010; Whiting, 2010; Schmidtke et al., 2011; Ozturk and Anli, 2014), to wine de-alcoholization through filtration and evaporation systems, that require subsequent wine restructuring …
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Estudio y desarrollo del deshojado precoz como técnica para el control del rendimiento productivo de la vid (Vitis vinifera L.): Efectos sobre el desarrollo vegetativo, los componentes de la producción, así como sobre la composición y la calidad de la uva y del vino
Introduccion y objetivos: La regulacion del rendimiento del vinedo es una cuestion de gran importancia en la viticultura actual, a medida que crece la presion por producir uva de calidad a unos costes sostenibles. El objetivo principal de este trabajo era verificar si el deshojado precoz puede ser …