Pancyprian TS Org. Viticulture key terms

The joined point where a fruiting scion is attached to a rootstock so the two grow as one plant; its quality and compatibility strongly affect vine vigour and longevity.

The rooted lower part of a grafted vine, chosen for soil adaptation, pest resistance and vigour control rather than for fruit; it supplies water and nutrients to the scion.

A root-feeding aphid-like insect that destroys susceptible own-rooted Vitis vinifera vines; control relies on resistant rootstocks and restrictions on moving infested soil and plant material.

The overall vegetative growth strength of a vine, expressed as shoot length, leaf area and pruning weight; it must be balanced against crop load to ripen fruit well.

The ratio of fruit carried by a vine to its vegetative capacity, often judged by leaf area per kilogram of grapes; too high a load delays ripening and reduces quality.

The arrangement of shoots, leaves and fruit in the vine's trellis space; its density, height and porosity govern light interception, airflow and disease pressure.

The total leaf surface area per unit of vineyard ground area; it is used to estimate whether a canopy can ripen its crop and maintain reserves.

The spring stage when dormant buds swell and green shoots emerge; its timing determines exposure of young growth to late frost and shapes the season's phenology.

The ripening phase when berries soften and change colour, sugars accumulate and acids decline; it marks the start of the ripening period used to schedule sampling and harvest.

The seasonal sequence of vine growth stages such as budbreak, flowering, veraison and maturity; it links variety choice and management timing to local climate.

A heat accumulation index summing daily temperatures above a base threshold, typically 10 degrees Celsius, over the season; it is used to compare sites and match varieties to climate.

A spring freeze after budbreak that kills emerging shoots and reduces yield; risk depends on site exposure, air drainage and variety earliness.

The downslope movement of cold air at night; sites where cold air pools are frost-prone, while slopes and outlets allow cold air to escape and warm the vineyard.

The climate of a specific vineyard or slope, shaped by elevation, aspect, slope and nearby water or hills; it differs from the wider regional climate and guides site and variety choice.

The compass direction a vineyard slope faces; it controls how much solar radiation the vines receive and therefore warmth, ripening speed and water demand.

The process of evaluating soil, climate, water, slope and access before planting; good decisions reduce frost, disease and ripening risk for the life of the vineyard.

The vertical sequence of soil layers from surface to parent material; depth, texture and structure of each layer control rooting depth, drainage and water storage.

The proportion of sand, silt and clay particles in a soil; it determines drainage, aeration, nutrient retention and how roots and water behave in the vineyard.

Soil rich in calcium carbonate, usually alkaline; it can lock up iron and other nutrients, causing chlorosis in susceptible rootstocks and varieties.

The amount of water a soil can store and release to vines; it depends on texture, organic matter and depth and determines how often irrigation is needed.

The posts, wires and anchors that support vine shoots and fruit; its design sets canopy shape, exposure and mechanisation options.

The permanent arrangement of trunk, arms and fruiting wood on a trellis, such as head-trained or cordon systems; it shapes canopy, yield and labour needs.

Winter pruning that leaves short one- or two-bud shoots on permanent arms; it suits cordon systems and allows relatively fast, partly mechanised work.

Winter pruning that retains one or more long fruiting canes per vine, tied along the trellis; it is common where large, well-exposed canopies are wanted.

The number of dormant buds retained per vine at pruning; it is the main tool for setting potential yield and balancing vine vigour with crop.

Removing whole clusters or parts of clusters during the season to reduce crop load; it improves ripening, berry size and uniformity when the vine is overcropped.

The period from veraison to harvest when sugars rise, acids fall and colour, aroma and tannin develop; sampling tracks these changes to choose picking date.

The amount of dissolved sugars in grape juice, usually measured in Brix or degrees Baumé; it indicates ripeness and predicts potential alcohol after fermentation.

The total acid content of juice or wine measured by titration and expressed as tartaric acid equivalent; it balances sugar and affects freshness and stability.

A measure of acidity on a logarithmic scale; in juice and wine it influences fermentation, colour, microbial stability and the effectiveness of sulphur dioxide additions.

The judgement of when to pick, weighing sugar, acidity, flavour, tannin, weather risk and labour or winery logistics; it directly sets wine style and quality.

The condition where vine water demand exceeds supply, reducing growth and photosynthesis; moderate stress can concentrate fruit, but severe stress harms yield and ripening.

Deciding when and how much to irrigate using soil moisture, evapotranspiration or plant indicators; good scheduling avoids waste while preventing damaging water stress.

A shortfall of an essential element such as nitrogen, potassium or iron that shows as leaf symptoms and reduced growth or fruit quality; diagnosis precedes correction.

A decision framework combining monitoring, thresholds, cultural and biological controls with pesticides only when needed, to control pests economically with least harm.

The pest or disease level at which control measures cost less than the damage they prevent; it guides spraying decisions within integrated pest management.

A vine disease caused by a water-mould organism that spreads in wet, humid weather and attacks leaves and young fruit; control depends on canopy airflow and timely fungicides.

The inherited ability of a pest or pathogen population to survive a pesticide dose that once controlled it; it develops under repeated use of the same mode of action.

Official controls on moving plants, soil and produce to stop pests and diseases entering a region; certification and inspection are required for planting material.

Chilling wine to precipitate potassium bitartrate crystals before bottling, preventing them forming later in the bottle; it is a common post-fermentation quality step.

An additive used in winemaking for its antioxidant and antimicrobial action; its effective dose depends on wine pH and it must be declared on the label above legal limits.

The mandatory and optional information printed on a wine bottle, such as origin, alcohol content, allergens and sulphites; rules differ by market and must be checked.

A document accompanying certain plants and plant products within a regulated area, certifying they meet plant-health requirements and enabling traceability.