C06 - Vinyard Management Flashcards
1
Q
What are the three main considerations a producer may need to make when choosing a site?
A
Environmental conditions
Business considerations
Grape variety
2
Q
Which environmental conditions does a producer have to consider?
A
Average temperature
Rainfall
Sunlight
Soil fertility
Drainage
3
Q
What business considerations must be made by a producer when selecting a vineyard site?
A
Proximity to utility infrastructure (power, water etc.)
Availability of a vineyard workforce
Accessibility for machinery
Cost of land
4
Q
What must a producer consider regarding grape variety when selecting a site?
A
It must suit climatic conditions
Demand
Legal restrictions
5
Q
How is a new vineyard prepared?
A
Existing vegetation is cleared
Fertility tested (and corrected with fertilizer if necessary)
Young vines are planted by hand or machine
Vines protected from animals with plastic sleeves
Irrigation allowed to help young vines establish themselves
6
Q
Why is irrigation allowed in some places after new vines have been planted?
A
To allow the vines to establish themselves
7
Q
When does a vine’s first yield usually come?
A
In the third year after planting
8
Q
What is the main factor that makes old vines desirable?
A
They give a greater concentration of flavors
8
Q
What are the potential disadvantages to growing an old vine?
A
Lower yield | Susceptibility to disease
8
Q
At what age on average are vines usually replaced?
A
30 - 50 years
9
Q
For how long is a vineyard typically left fallow after the vines are dug up?
A
Three or more years
10
Q
What are the four main techniques used to manage a vine?
A
Training
Pruning
Trellising
Planting density
11
Q
The grower will adapt the four main vineyard management techniques to suit the availability of these resources:
A
Temperature
Sunlight
Water
Soil nutrients
12
Q
Name a practical consideration a grower may have to make when establishing a vineyard
A
Use of machinery
13
Q
What is the ultimate goal of a grape-grower?
A
To maximize the production of fruit at the desired quality level as economically as possible
14
Q
What is vine training?
A
The shape of the permanent wood of the vine
15
Q
What are the two principal branches of vine training?
A
Head training | Cordon training
16
Q
Both head training and cordon training can be…to benefit from heat retained by the soil or…to avoid frosts
A
Low trained | High trained
17
Q
Describe a head-trained vine
A
They have very little permanent wood
Some have only a trunk
Some have a few arms protruding from the trunk
They can be spur-pruned or replacement cane pruned
18
Q
Describe a vine which is cordon trained
A
A trunk with one or two arms of permanent wood | Usually spur pruned
19
Q
Describe a positive and negative of cordon training a vine
A
The sturdy permanent cordon with shoots positioned along its length, makes mechanization easier
It can take longer to establish because of the greater amount of permanent wood
20
Q
Cordon training can also be used to create…
A
Big vine structures
21
Q
What is pruning?
A
The removal of unwanted leaves, canes and permanent wood
22
Q
What is the purpose of pruning?
A
It shapes the vine and limits its size
23
When does pruning typically take place?
Every summer and every winter
24
What is the main purpose of winter pruning?
To determine the number and location of buds that will form shoots in the coming season
25
Why is it important to ensure that buds are not too close together?
To help with canopy management
26
What are the two styles of winter pruning?
Spur pruning | Replacement cane pruning
27
Describe spur pruning
Spurs are either distributed along a cordon or around the top of the trunk
28
Describe replacement cane pruning
Typically one or two canes are retained
Each cane is tied horizontally to the trellis for support
Most common on head-trained vines
29
What are the two main disadvantages to replacement cane pruning?
It requires a large, skilled workforce to choose suitable canes and train them
It is more complex than spur pruning
30
What is the alternative name for replacement cane pruning?
Guyot training
31
What does summer pruning involve?
Trimming the canopy to restrict vegetative growth and direct sugar production to the grape
It can involve leaf stripping so that bunches have optimal exposure to the sun
32
What is a vine's 'canopy'?
All green parts of the vine
33
What is a grower's most important concern when considering canopy management?
Whether to trellis
34
What is a trellis?
A permanent structure of stakes and wires, used to support any replacement canes and the vine's annual growth
35
What is a bush vine?
The vines do not have a trellis system and the shoots can hang down as far as the ground
They are head-trained and spur pruned
36
What kind of climate is a bush-trained vine most suited to? Give two examples...
Warm/hot, dry, sunny
Southern Rhóne
Barossa Valley
37
Why is bush-training best suited to a hot, sunny environment?
The extra shade helps to protect the grapes
38
Why is bush-training unsuitable for cool or wet regions?
The shade can impede grape ripening| Lack of airflow can promote disease
39
Describe vines in Beaujolais
They are head-trained and spur-pruned | The buds are tied together at the tips, helping to expose bunches to air and sunlight
40
What kind of vines are not suitable for mechanical harvesting?
Untrellised
41
Give another name for bush-training
Gobelet
42
Describe the two main aspects of trellised vineyards | What is their collective term?
Each row of vines requires a line of posts joined by horizontal wires
Canes and shoots are tied to the trellis
Canopy management
43
What are the three important reasons for canopy management?
To control the amount of sunlight that gets to the canopy
To improve air circulation
To aid mechanization
44
How does trellising aid mechanization?
It separates leaves from grapes
45
What is the secondary benefit of separating leaves and fruit?
Spraying of insecticides and fungicides is more effective
46
What is the most widely used trellising system?
Vertical Shoot Positioning (VSP)
47
Which pruning system can VSP be used with?
Either
48
Describe VSP
Shoots are trained vertically and tied in place onto the trellis
49
How can VSP be adapted in hot, sunny regions?
Rather than tying the top of the shoots, allowing them to flop over, providing some shade for the fruit
50
Why might a grape grower choose adapted VSP over bush vine training?
It allows for mechanization
51
How is planting density measured?
It is the number of vines planted in a given area
52
What is a hectare?
An area enclosed by a square with 100m sides
53
What is the rough range of planting densities?
1,000 - 10,000 vines per hectare
54
How does an acre relate to a hectare?
One acre is approximately 0.4 hectares
55
Name a very important set of criteria when deciding on planting density
Availability of nutrients and water
56
Explain the most advantageous planting density considerations for areas with limited water availability
Low planting density allows each vine's roots to take up water from a larger volume of soil without any competition
57
Explain the effect on a vine of having low levels of nutrients but sufficient water?
It can still grow vigorously and produce lots of vegetative growth in preference to fruit
58
In a situation where a vine has plenty of rainfall/water, what may a grower do to reduce vigor?
Plant at high density to provide competition for resources
59
How may pruning be used to affect vine vigor in a well watered area? Describe why accuracy is important
Careful winter pruning can affect vine vigor
Too few buds left means the buds will have too much energy in the form of carbohydrates and will grow too vigorously and vice versa
60
What are the two human-controlled factors in the vineyard which can affect vine vigor?
Planting density | Pruning
61
What is the problem for a winemaker when there is ample rainfall and very fertile soils?
Vines can be overly vigorous | Pruning and planting density are often not enough
62
What is an additional practice which can be used when planting density and pruning aren't enough to reduce vigor sufficiently?
Vines may be planted at low density with multiple cordons or canes
63
What is yield?
A measure of the amount of grapes produced
64
In what units may yield be measured?
Weight| Volume
65
What are the three principal reasons why a winemaker may need to know yield?
Legal requirements
Contractual obligations
Predicting tank space
66
How may yield be approximately predicted?
By observing the number of buds left on a vine after winter pruning
67
Which factors may make predicting yield difficult/inaccurate?
Frost damage
Poor fruit set
Pests and diseases
68
How may yields be reduced by the winemaker?
By removing immature grapes shortly after véraison
69
What is the process of removing immature grapes after véraison called?
Green harvesting
70
Why must green harvesting be carefully timed?
If done at the wrong time, the vine will compensate for the loss by increasing the size of the grapes that have been retained, causing flavor dilution and a re-increase of yield
71
What effect does yield have on grape quality?
No discernible effect
72
What are the broad potential effects of pests and diseases?
Reduced yield | Reduced fruit quality
73
What effect does leaf-damage have on a vine?
It reduces photosynthesis and consequently limits the vine's ripening ability
74
What are nematodes?
Microscopic worms that attack the roots of the vine, interfering with water and nutrient uptake
75
What is the other effect a nematode can have other than interfering with nutrient/water uptake?
Transmitting vine diseases
76
What is the best treatment for nematodes?
Prevention
77
How may nematodes be effectively prevented?
Sanitizing the soil before replanting| Using resistant rootstocks
78
What are the two biggest problems when it comes to birds and mammals?
They can eat large numbers of grapes | Half eaten/crushed grapes are more susceptible to fungal disease
79
How are birds and mammals deterred?
Nets and fences
80
What do insects do to a vine?
Feed on grapes and leaves
81
How is the problem of insects treated?
With insecticide sprays or integrated pest management
82
What kind of environment do downy and powdery mildew thrive in?
Warm, humid environments
83
Which parts of the vine can downy and powdery mildew attack?
All green parts
84
What effect does it have on a wine if attacked by mildew?
Grapes lose their fruity flavor | The wine develops a moldy, bitter taint
85
What is grey rot caused by?
The fungus Botrytis Cinerea
86
In what conditions does grey rot thrive?
Damp conditions
87
Which part of the vine does grey rot attack?
Grapes
88
What effect can grey rot have on black grapes?
They can lose their color
89
What is noble rot?
The name for grey rot when it has been used for winemaking
90
How was powdery mildew traditionally treated?
With a sulfur-based spray
91
How was downy mildew traditionally treated?
With Bordeaux Mixture - a copper based spray
92
How is spraying most commonly done?
By tractor
93
Why must spraying stop close to harvest?
So that there are no harmful chemical residues in the wine
94
Other than spraying, how may the risk of fungal diseases developing be reduced?
Using appropriate canopy management
95
Explain how canopy management may reduce the chance of fungal disease
An open vine canopy allows greater flow of air, promoting evaporation and keeping it dry
96
What's the big advantage of preventing fungal disease with only canopy management?
It's financially and environmentally beneficial, as sprays are not needed
97
What do viruses do to a vine?
The reduce its ability to function
98
How do viruses affect wine?
They can dramatically reduce yield and quality
99
How are viruses usually spread among vines?
Via cutting or nematodes
100
What treatments are there for vine viruses?
None
101
How can viruses be eradicated?
By digging up vines and sanitising the land
101
How do bacterial diseases affect vines?
Many just reduce grape quality and quantity, but some can kill the vines
102
How are bacterial diseases usually spread?
By small insects called sharpshooters
103
How may bacterial diseases be treated or cured?
They can't
104
How can bacterial diseases be prevented?
Strict quarantine procedures and interrupting the lifecycle of the sharpshooters
105
How may bacterial diseases be eradicated?
Digging up vines and sanitizing the land
106
What viticultural practice took off in the second half of the twentieth century?
The use of man made sprays/chemicals to control pests and diseases
An increased use of fertilizers
107
Why has chemical spraying become a concern?
It damages the environment
108
What are the three main options available to those wanting to reduce chemical spraying?
Sustainable agriculture
Organic agriculture
Biodynamic agriculture
109
Are man-made chemicals prohibited in sustainable agriculture?
No
110
Fundamentally, what is sustainable agriculture?
Growers are encouraged to pay closer attention to pest lifecycles and weather, in order to prevent diseases and outbreak before it occurs
111
What is another possible name for sustainable agriculture when related specifically to pests?
Integrated Pest Management
112
How may pest numbers be controlled during IPM?
By encouraging the presence of the pests' natural predators
113
What is organic agriculture?
Similar to sustainable agriculture, but with only a limited number of the traditional treatments against pests and diseases and in smaller quantities It is a set of accredited practices
114
Why is organic viticulture inconsistent?
Accreditation boards vary with regard to standards
115
What is the one main rule all organic vineyards must follow to be accredited?
They need to undergo a period of conversion before they can be certified
116
Who founded Biodynamic Agriculture?
Rudolf Steiner and Maria Thun
117
What broadly, is biodynamic agriculture?
It adopts organic practices but also incorporates philosophy and cosmology
Vineyard soil is seen as part of a connected system with Earth, the air and other planets
Practitioners adapt growing practices in coincidence with cosmic cycles
118
In biodynamic agriculture, what is used as fertilizer, disease treatment and pest deterrent?
Homeopathic remedies called treatments
119
How does a vineyard officially become biodynamic?
By being certified
120
When does budburst occur in the northern and Southern Hemispheres?
March - April | September - October
121
When does early shoot and leaf growth occur in the northern and Southern Hemispheres?
March - May | September - November
122
Where does flowering and fruit set occur in the northern and Southern Hemispheres?
May - June | November - December
123
When does Véraison and berry ripening occur in the northern and Southern Hemispheres?
July - September | January - March
124
When does harvest occur in the northern and Southern Hemispheres?
September - October | March - April
125
When is winter dormancy in the northern and Southern Hemispheres?
December - March | July - September
126
At what mean temperature does budburst generally begin?
10C
127
The temperature at which budburst occurs depends on...
Grape variety
128
Name two varieties which bud at relatively low temperatures. Give another name for this...
Chardonnay and Pinot Noir | Early-budding varieties
129
Name one variety which buds at relatively low temperatures. Give another name for this...
Cabernet Sauvignon | A late-budding variety
130
What is the biggest risk to budburst?
Spring frosts
131
What practice begins at budburst?
Spraying
132
Describe what happens during 'early shoot and leaf growth'? How is energy provided for this?
Shoots grow rapidly until the vine flowers
Initially fueled by stored carbohydrate reserves
Energy provided partially by leaves as they grow and begin to photosynthesize
133
When are water and nutrients most important during a plant's lifecycle?
Early shoot and leaf growth
134
If practiced, when does shoot-tying take place?
During early shoot and leaf growth
135
What does the vine most need during flowering? Why?
Warm temperatures
Plenty of sunshine
Little or no rain
Pollination may be disrupted, reducing fruit-set
136
What is fruit set? What else occurs?
When a flower develops into a grape | Unpollinated flowers drop off
137
What is it called when more flowers than normal fail to fertilize?
Coulure
138
What is Millerandage?
When grapes form without seeds and remain small
139
What is the outcome of Coulure or Millerandage?
Reduced yields
140
What is generally the cause of Millerandage and Coulure?
Cold, cloudy or rainy weather during pollination
140
How long do grapes grow before veraison?
6 - 8 weeks
141
What is véraison? Describe it
The point at which grapes begin to ripen | Skin changes color
142
What occurs between Véraison and ripening?
Grapes swell and fill with water
Sugar levels rise, acid levels drop
Colour pigments and flavor compounds accumulate
Tannins develop
143
What conditions are ideal for ripening?
Warm and sunny conditions| Mild water stress to inhibit shoot growth and encourage grape ripening
144
What processes may happen during berry ripening? What is the purpose?
Summer pruning
Green harvesting
Summer pruning removes excess foliage, ensuring the canopy remains open
Green harvesting controls yield and improves fruit quality
145
What conditions are ideal for harvest? Why?
Dry
Excess rainfall before harvest can cause the grapes to swell, diluting flavor Chances of rot are increased too
146
When must spraying finish?
A reasonable time before harvest to ensure there are no harmful residues in the wine
147
What happens naturally during winter dormancy?
Shoots become woody
Leaves fall
The vine stores carbohydrates in its roots
148
What effect can winter freeze have on a vine?
Buds can die | The vine can die
149
How may a vine be protected from winter freeze?
By piling earth up around the vine
150
What may a grape grower do during winter dormancy?
Winter pruning
151
How is Véraison defined?
The point at which grapes begin to ripen
152
What signals the start of Véraison?
A change in color of the grapes' skin
153
What happens to the colors of black and white grapes during Véraison?
Black grapes turn red, then purple | White grapes turn translucent and golden
154
What happens within grapes as they ripen?
Sugar levels rise and acid levels drop
155
How is the ripening process in a grape tracked?
Monitoring the rise in sugar levels
156
What else may happen within a grape as acid levels drop and sugar levels rise?
The grapes will develop their signature flavors | Tannins in the grape skins become less bitter and astringent
157
What dictates when the ideal balance of sugar, acid, flavor and tannin is reached in a grape?
Grape variety
Climate
Style/quality of wine being produced
158
When does harvest ideally begin?
When the vigneron believes the grapes have the exact qualities needed to create the desired style of wine
159
What may cause a winemaker to bring the harvest forward?
Poor weather conditions
160
What does hail do to crops?
Destroys them
161
What can rain do to crops?
Cause the grapes to swell excessively and dilute the juice
162
Why do winemakers need to coordinate the arrival of fruit at the winery?
To make sure it is not suddenly overwhelmed with fruit it does not have the capacity to process
163
Name the main factors which dictate how a vineyard should be harvested
How the vineyard is planted
Labor availability/cost
Vineyard topography
Weather conditions
Winemaking choices
163
How is harvesting done?
By hand or machine
164
How must premium wine be harvested?
By machine or hand
165
How do machine harvesters work?
By shaking the trunk of the vine and collecting the ripe berries as they fall off, leaving the stalks behind
166
What are the major disadvantages/difficulties of machine harvesting?
They are not selective, often collecting unhealthy, damaged and unripe grapes, as well as bits of leaf, insects and other contaminants
They can only be used on flat or gently sloping land
They are best suited to varieties whose grapes are not easily damaged and come away easily from their stems
They cannot be used for wines whose grapes need to be picked in whole bunches
167
What is MOG?
Matter Other than Grapes | Unwanted contaminants collected often by machines during harvest
168
How are MOG dealt with during harvest?
They can be removed at the winery during sorting
169
When might it not be possible to sort out MOG?
Some harvesting operations are too large
170
What is arguably the biggest advantage of machine harvesting?
Speed
171
Give two reasons as to why speed is such a big benefit when it comes to machine-harvesting
The vintage may be threatened by bad weather| Some varieties may become overripe very quickly
172
Why might it be beneficial that machines can work overnight? Explain your answer
Grapes can be brought back to the winery when they are still cool
If they are cool, money is saved on cooling them before fermentation
It slows down the process of oxidation
173
Name two wines whose grapes need to be picked in whole bunches
Champagne | Beaujolais
174
Describe hand harvesting
It involves pickers cutting off individual bunches of grapes with secateurs
175
It involves pickers cutting off individual bunches of grapes with secateurs
It is slower
It is more labor-intensive
It can be more expensive
176
What is the biggest advantage of hand-harvesting?
It allows grape selection to take place in the vineyard
177
For which wines is hand-harvesting essential? Why?
Those requiring grapes affected by noble rot
Onset and level of rot can vary between bunches
Less damage occurs Grapes can be further protected from damage by transporting them in shallow, stackable trays
178
Unlike machine harvesting, the...are retained
Stems
179
Why is it good that hand harvesting allows stems to be retained
Whole, intact bunches can produce a very clean, pure juice when pressed during white winemaking
It is essential for whole-bunch fermentation in red winemaking
180
Give three examples of places where machine harvesting is not possible. Give the reason
Douro
Mosel
Northern Rhóne
