45 Viticulture

Viticulture or winegrowing is the cultivation and harvesting of grapes. It is a branch of the science of horticulture. While the native territory of Vitis vinifera, the common grape vine, ranges from Western Europe to the Persian shores of the Caspian Sea, the vine has demonstrated high levels of adaptability to new environments, hence viticulture can be found on every continent except Antarctica.

Vitis (grapevines) is a genus of 79 accepted species of vining plants in the flowering plant family Vitaceae. The genus is made up of species predominantly from the Northern hemisphere. It is economically important as the source of grapes, both for direct consumption of the fruit and for fermentation to produce wine. The study and cultivation of grapevines is called viticulture.

Ampelography is the field of botany concerned with the identification and classification of grapevines, Vitis spp. Traditionally this has been done by comparing the shape and colour of the vine leaves and grape berries; more recently the study of vines has been revolutionised by DNA fingerprinting.

The annual growth cycle of grapevines is the process that takes place in the vineyard each year, beginning with bud break in the spring and culminating in leaf fall in autumn followed by winter dormancy. From a winemaking perspective, each step in the process plays a vital role in the development of grapes with ideal characteristics for making wine. Viticulturalists and vineyard managers monitor the effect of climate, vine disease and pests in facilitating or impeding the vine's progression from bud break, flowering, fruit set, veraison, harvesting, leaf fall and dormancy-reacting if need be with the use of viticultural practices like canopy management, irrigation, vine training and the use of agrochemicals. The stages of the annual growth cycle usually become observable within the first year of a vine's life. The amount of time spent at each stage of the growth cycle depends on a number of factors-most notably the type of climate and the characteristics of the grape variety.

Hans Jörg Böhm, known in Portugal as Comendador Jorge Böhm, was born on 1 July 1938 in the German town of Neustadt an der Weinstraße. He began his career as a German entrepreneur in viticulture and the wine trade. He is best known for his decades-long work promoting innovation through technology transfer of new viticultural and vine improvement practices, particularly for Portuguese and Spanish grapevine varieties. He is also a coordinating author and has organized many technical and scientific symposiums on viticulture and oenology.

The Calmont, also called the Calmond, between Bremm and Ediger-Eller in the county of Cochem-Zell in the German state of Rhineland-Palatinate, is a steep hill on the heights above the Moselle river to a height of 380.6 m above sea level (NHN). It lies within the Moselle wine region and is home to the vineyards of Bremmer Calmont and Ellerer Calmont which, with gradients of up to over 65º, are among the steepest vineyards in the world.

In viticulture, the canopy of a grapevine includes the parts of the vine visible aboveground - the trunk, cordon, stems, leaves, flowers, and fruit. The canopy plays a key role in light energy capture via photosynthesis, water use as regulated by transpiration, and microclimate of ripening grapes. Canopy management is an important aspect of viticulture due to its effect on grape yields, quality, vigor, and the prevention of grape diseases. Various viticulture problems, such as uneven grape ripening, sunburn, and frost damage, can be addressed by skillful canopy management. In addition to pruning and leaf trim, the canopy is often trained on trellis systems to guide its growth and assist in access for ongoing management and harvest.

Chunche is a Uyghur word that refers to a kind of building used to make raisins in Turpan, Xinjiang Uyghur Autonomous Region, China. The building has a dark interior, and the walls are covered with a large number of holes to allow wind to pass through and assist in the drying process through evaporation. Chunches are usually built in high, windy, areas due to the need for the wind.

In viticulture, the climates of wine regions are categorised based on the overall characteristics of the area's climate during the growing season. While variations in macroclimate are acknowledged, the climates of most wine regions are categorised as being part of a Mediterranean, maritime or continental climate. The majority of the world's premium wine production takes place in one of these three climate categories in locations between the 30th parallel and 50th parallel in both the northern and southern hemisphere. While viticulture does exist in some tropical climates, most notably Brazil, the amount of quality wine production in those areas is so small that the climate effect has not been as extensively studied as other categories.

Colomé is a village and rural municipality in Salta Province in northwestern Argentina. It is located about 20 km from Molinos, Salta. This settlement was established by the last Spanish governor of Salta, Nicolás Severo de Isasmendi, in 1831. His daughter Ascención imported grapevines from France and planted them in the area at an average altitude of 2200 m, which is extremely high for viticulture. The climat is dry and arid. Temperature differences between day and night can be high. Winters are very cold. Under these conditions, growing grapes is a challenge, but has the advantage, that insects, pests and diseases hardly are present. Swiss vigneron Donald M. Hess bought the Bodega Colomé and vineyards in the neighbourhood in 2001. One of his vineyards is at 3100 m, the highest elevation worldwide. Its wine is called Altura Máxima. In addition, Donald M. Hess has built a museum in Colomé dedicated to the American artist James Turrell, which opened in 2009.

Lucius Junius Moderatus Columella was a prominent writer on agriculture in the Roman empire.

Comet vintages are years during which an astronomical event, involving generally a "Great Comet", occurs prior to harvest. Throughout the history of wine, winemakers have attributed successful vintages and ideal weather conditions to the unexplained effects caused by the comets. Some of the most heralded vintages in the last couple of centuries—such as the 1811, 1826, 1839, 1845, 1852, 1858, 1861, 1985, and 1989 vintages—have coincided with a notable appearance of a comet. There is no scientific basis for any effect of comets on viticulture, but the term nevertheless remains in use.

Espalier is the horticultural and ancient agricultural practice of controlling woody plant growth for the production of fruit, by pruning and tying branches to a frame. Plants are frequently shaped in formal patterns, flat against a structure such as a wall, fence, or trellis, and also plants which have been shaped in this way.

The Great French Wine Blight was a severe blight of the mid-19th century that destroyed many of the vineyards in France and laid waste to the wine industry. It was caused by an aphid that originated in North America and was carried across the Atlantic in the late 1850s. The actual genus of the aphid is still debated, although it is largely considered to have been a species of Daktulosphaira vitifoliae, commonly known as grape phylloxera. While France is considered to have been worst affected, the blight also did a great deal of damage to vineyards in other European countries.

The harvesting of wine grapes (Vintage) is one of the most crucial steps in the process of wine-making. The time of harvest is determined primarily by the ripeness of the grape as measured by sugar, acid and tannin levels with winemakers basing their decision to pick based on the style of wine they wish to produce. The weather can also shape the timetable of harvesting with the threat of heat, rain, hail, and frost which can damage the grapes and bring about various vine diseases. In addition to determining the time of the harvest, winemakers and vineyard owners must also determine whether to use hand pickers or mechanical harvesters. The harvest season typically falls between August & October in the Northern Hemisphere and February & April in the Southern Hemisphere. With various climate conditions, grape varieties, and wine styles the harvesting of grapes could happen in every month of the calendar year somewhere in the world. In the New World it is often referred to as the crush.

The Historical Museum of the Palatinate is a museum in the city of Speyer in the Palatinate region of the German state of Rhineland-Palatinate. It is situated across the square from the Speyer Cathedral. The museum's focus is on the History of the Palatinate; it has a collection of about 1 million artifacts, the oldest being an approximately 190,000-year-old hand axe. The museum is among the most important in Germany, and is known for its special exhibitions. With over 200,000 visitors per year it is one of the major attractions of Speyer.

Hybrid grapes are grape varieties that are the product of a crossing of two or more Vitis species. This is in contrast to crossings between grape varieties of the same species, typically Vitis vinifera, the European grapevine. Hybrid grapes are also referred to as inter-specific crossings or "Modern Varieties." Due to their often excellent tolerance to powdery mildew, other fungal diseases, nematodes, and phylloxera, hybrid varieties have, to some extent, become a renewed focus for European breeding programs. The recently developed varieties, Rondo, and Regent are examples of newer hybrid grape varieties for European viticulturalists. Several North American breeding programs, such as those at Cornell and the University of Minnesota, focus exclusively on hybrid grapes, with active and successful programs, having created hundreds if not thousands of new varieties.

The International Grape Genomics Program (IGGP) is a collaborative genome project dedicated to determining the genome sequence of the grapevine Vitis vinifera. It is a multinational project involving research centers in Australia, Canada, Chile, France, Germany, Italy, South Africa, Spain, and the United States.

Centro di Cultura e Civiltà Contadina - Biblioteca Internazionale La Vigna is an institute of documentation specialised in studies concerning agriculture and wine. It is considered as the most important reference point for ampelographic research worldwide. It is situated in Vicenza in Contrà Porta Santa Croce n. 3 in Palazzo Brusarosco, then Galla. The palace is an eighteenth-century building, which was partially restored by the architect Carlo Scarpa.

Irrigation in viticulture is the process of applying extra water in the cultivation of grapevines. It is considered both controversial and essential to wine production. In the physiology of the grapevine, the amount of available water affects photosynthesis and hence growth, as well as the development of grape berries. While climate and humidity play important roles, a typical grape vine needs 25-35 inches of water a year, occurring during the spring and summer months of the growing season, to avoid stress. A vine that does not receive the necessary amount of water will have its growth altered in a number of ways; some effects of water stress are considered desirable by wine grape growers.

A klopotec is a wooden mechanical device on a high wooden pole, similar to a windmill. It is used as a bird scarer in the vineyards of traditional wine-growing landscapes of Slovenia, Austria, and Croatia. It is one of the symbols of Slovenia and Styria.

The Lower Moselle is the name given to the lower reaches of the Moselle river - just under 100 kilometres long - in Germany between Pünderich and the Moselle's confluence with the Rhine at Koblenz. The Lower Moselle landscape differs from that of the Middle and Upper Moselle, much of it forming a narrower valley with high and steep sides in places. On the cut banks of the river that are oriented towards the south and west, vineyards are managed, often on the tiniest, terraced strips of land on steep hillslopes.

Millerandage is a potential viticultural hazard problem in which grape bunches contain berries that differ greatly in size and, most importantly, maturity. Its most common cause is cold, rainy or otherwise bad weather during the flowering stage of the vines though other factors, such as boron deficiency or fanleaf degeneration, may also play a role.

The National Wine Agency of Georgia is a legal entity of public law under the Ministry of Agriculture of Georgia that was founded in 2014 in accordance with the law on “Vine and Wine". The Agency operates in constant contact with the Ministry of Agriculture and relevant state and private companies in the field of wine making.

Noble rot is the beneficial form of a grey fungus, Botrytis cinerea, affecting wine grapes. Infestation by Botrytis requires moist conditions. If the weather stays wet, the damaging form, "grey rot", can destroy crops of grapes. Grapes typically become infected with Botrytis when they are ripe. If they are then exposed to drier conditions and become partially raisined, this form of infection is known as noble rot. Grapes picked at a certain point during infestation can produce particularly fine and concentrated sweet wine. Wines produced by this method are known as botrytized wines.

The Pixie Grape is a new type of Vitis vinifera cultivar. The Pixie is a natural dwarf grapevine that is derived from the periclinal L1/L2 chimera Pinot Meunier. These dwarf grapevines tend to have short internodes and prefer to grow flowers instead of tendrils. They grow from 1 foot to 2 feet in height and produce clusters with a size on average of 4 inches. It is simple to cultivate in greenhouses and grows year round. Its purpose was to create an easy tool with which to conduct grapevine research. The grape was developed by grape rootstock breeder Dr. Peter Cousins of the USDA.

The propagation of grapevines is an important consideration in commercial viticulture and winemaking. Grapevines, most of which belong to the Vitis vinifera family, produce one crop of fruit each growing season with a limited life span for individual vines. While some centenarian old vine examples of grape varieties exist, most grapevines are between the ages of 10 and 30 years. As vineyard owners seek to replant their vines, a number of techniques are available which may include planting a new cutting that has been selected by either clonal or mass (massal) selection. Vines can also be propagated by grafting a new plant vine upon existing rootstock or by layering one of the canes of an existing vine into the ground next to the vine and severing the connection when the new vine develops its own root system.

In viticulture, there are several levels of regional climates that are used to describe the terroir or immutable characteristics of an area. These levels can be as broad as a macroclimate which includes entire wine regions or as small as a microclimate which includes the unique environment around an individual grapevine. In the middle is the mesoclimate which usually describes the characteristics of a particular vineyard site.

The Revolt of the Languedoc winegrowers was a mass movement in 1907 in Languedoc and the Pyrénées-Orientales of France that was repressed by the government of Georges Clemenceau. It was caused by a serious crisis in winemaking at the start of the 20th century. The movement was also called the "paupers revolt" of the Midi. It was marked by the fraternization of the 17th line infantry regiment with the demonstrators in Béziers.

In viticulture, ripeness is the completion of the ripening process of wine grapes on the vine which signals the beginning of harvest. What exactly constitutes ripeness will vary depending on what style of wine is being produced and what the winemaker and viticulturist personally believe constitutes ripeness. Once the grapes are harvested, the physical and chemical components of the grape which will influence a wine's quality are essentially set so determining the optimal moment of ripeness for harvest may be considered the most crucial decision in winemaking.

The Speyer wine bottle is a sealed vessel, presumed to contain liquid wine, and so named because it was unearthed from a Roman tomb found near Speyer, Germany. It is considered the world's oldest known bottle of wine.

Staatliche Lehr- und Versuchsanstalt für Wein- und Obstbau Weinsberg (LVWO) is a training and research institute for wine and fruit growing located in the town of Weinsberg in Heilbronn district, Baden-Württemberg, Germany.

Terroir is a French term used to describe the environmental factors that affect a crop's phenotype, including unique environment contexts, farming practices and a crop's specific growth habitat. Collectively, these contextual characteristics are said to have a character; terroir also refers to this character.

Trifon Zarezan is a Bulgarian national custom observed on the 1st or 14th of February in honor of Saint Tryphon.

The Twelve Grapes is a Spanish tradition that consists of eating a grape with each clock bell strike at midnight of December 31 to welcome the New Year.

Ullage is a winemaking term that has several meanings but most commonly refers to the headspace of air between wine and the top of the container holding the wine. It can also refer to the process of evaporation that creates the headspace itself or it can be used as a past tense verb to describe a wine barrel or bottle that has gone through the evaporation process. The headspace of air is a mixture mostly of alcohol and water vapors with carbon dioxide that is a by-product of the fermentation process. In containers that are not completely air-tight, oxygen can also seep into this space. While some oxygen is beneficial to the aging process of wine, excessive amounts can lead to oxidation and other various wine faults. This is why wine in the barrels is regularly "topped up" and refilled to the top with wine in order to minimize the head space. In the bottle, the ullage or "fill level" of the wine can be an important indicator of the kind of care and storage conditions that the wine was kept in. After-market resellers and wine auction houses will often inspect the ullage levels of older vintages to determine the potential quality and value of wine.

In viticulture, veraison is the onset of the ripening of the grapes. The official definition of veraison is "change of color of the grape berries". Veraison represents the transition from berry growth to berry ripening, and many changes in berry development occur at veraison.

The use of vine training systems in viticulture is aimed primarily to assist in canopy management with finding the balance in enough foliage to facilitate photosynthesis without excessive shading that could impede grape ripening or promote grape diseases. Additional benefits of utilizing particular training systems could be to control potential yields and to facilitate mechanization of certain vineyard tasks such as pruning, irrigation, applying pesticide or fertilizing sprays as well as harvesting the grapes.

A vineyard is a plantation of grape-bearing vines, grown mainly for winemaking, but also raisins, table grapes and non-alcoholic grape juice. The science, practice and study of vineyard production is known as viticulture. Vineyards are often characterised by their terroir, a French term loosely translating as "a sense of place" that refers to the specific geographical and geological characteristics of grapevine plantations, which may be imparted to the wine itself.

A vineyard designated wine is a wine produced from the product of a single vineyard with that vineyard's name appearing on the wine label.

A vineyard track is a term used in the legislature of the Czech Republic, meaning a site suitable for vineyards growing.

Vintage, in winemaking, is the process of picking grapes and creating the finished product—wine. A vintage wine is one made from grapes that were all, or primarily, grown and harvested in a single specified year. In certain wines, it can denote quality, as in Port wine, where Port houses make and declare vintage Port in their best years. From this tradition, a common, though not strictly correct, usage applies the term to any wine that is perceived to be particularly old or of a particularly high quality.

Vitis vinifera, the common grape vine, is a species of flowering plant, native to the Mediterranean region, Central Europe, and southwestern Asia, from Morocco and Portugal north to southern Germany and east to northern Iran. There are currently between 5,000 and 10,000 varieties of Vitis vinifera grapes though only a few are of commercial significance for wine and table grape production.

A winemaker or vintner is a person engaged in winemaking. They are generally employed by wineries or wine companies, where their work includes:Cooperating with viticulturists Monitoring the maturity of grapes to ensure their quality and to determine the correct time for harvest Crushing and pressing grapes Monitoring the settling of juice and the fermentation of grape material Filtering the wine to remove remaining solids Testing the quality of wine by tasting Placing filtered wine in casks or tanks for storage and maturation Preparing plans for bottling wine once it has matured Making sure that quality is maintained when the wine is bottled

In viticulture, the yield is a measure of the amount of grapes or wine that is produced per unit surface of vineyard, and is therefore a type of crop yield. Two different types of yield measures are commonly used, mass of grapes per vineyard surface, or volume of wine per vineyard surface.