Viticulture Flashcards
Put the stages of the annual growth cycle of the vine in chronological order. Include winter dormancy and weeping.
Winter Dormancy, Weeping, Bud break, shoot and leaf growth, photosynthesis begins, flowering, berry set, veraison, phenolic maturity and harvest
The process by which materials are moved from one part of the plant to another
Translocation
The process by which sunlight is converted into sugar
Photosynthesis
The process by which water evaporates through openings on the underside of the leaves
Transpiration
The process by which sugar is broken down and converted into biological energy
Respiration
A problem that causes poor fruit set, also known as shatter
Coulure
A soil-based roundworm that has become more prevalent with the increased use of shallow-rooted rootstock
Nematode
A mold that is sometimes beneficial, also known as noble rot
Botrytis Cinerea
A fungal disease also known as powdery mildew
Odium
A problem with abnormal fruit set that causes grape bunches to have a high proportion of small, seedless berries mixed in with normal, larger berries
Millerandage
A fungal disease also known as downy mildew
Peronospora
A bacterial disease spread by insects such as the glassy-winged sharpshooter
Pierce’s Disease
A destructive louse that feeds off the roots of vinifera vines
Phylloxera
True of False: In general, a lower latitude translates into a warmer climate
True
True of False: The Oechsle system of measuring grape ripeness is widely used in France
False (Germany)
True of False: Photosynthesis slows, but does not stop at night
False (Photosynthesis needs sunlight)
True of False: The annual growth of the vine is considered to begin each year with bud break, which starts once temperatures reach 65F in the spring
False (50F)
True of False: When producing dry table wines, the typical time from bud break to harvest is 140 to 160 days
True
True of False: Ideally, soil should enable the vine’s roots to access water when needed, but also ensure that excess water is drained away
True
True of False: In the Northern Hemisphere, a vineyard on a slope that faces north gets the most sun.
False (Vineyard facing south)
True of False: Regions with a continental climate generally experience hotter summers and colder winters than regions with a Mediterranean climate
True
True of False: Transpiration is the process by which water evaporates through openings on the underside of the leaves known as stomata
True
True of False: A mediterranean climate is considered to have too short a growing season in order for grapes to ripen on a regular basis
False (Marginal Climate)
True of False: In general, sugar as measured by degrees Brix will convert to alcohol by a conversion factor of 55%
True
True of False: Photosynthesis tends to slow down at temperatures below 50F
True (Optimal temps: 70-85F
True of False: A refractometer is used to measure the amount of rainfall that penetrates the topsoil to a depth of 6 inches
False (Refractometer measures the Brix (grape sugars)
True of False: Head-trained vines sometimes refereed to as a goblet-style vine, do not typically require vine trellis system.
False (Head-trained vines are typically free standing and do not require a support system)
Vine training process by which the new year’s shoots and leaves are trained upward and braced by trellis wires as they grow
VSP (vertical shoot positioning)
Who developed The philosophy of biodynamics in the 20th century
Rudolf Steiner
The natural aspects of a vineyard
Terroir
System used in Germany and Switzerland to measure sugar density
The Oechsle
Physical maturity refers to the level of
Sugar Maturity
