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Continuing Studies > Viticulture > Flashcards

Viticulture Flashcards

1
Q

What are the 3 main types of acid found in wine?

A

Malic Acid
Lactic Acid
Tartric Acid

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2
Q

What is Achéria?

A

The oldest name/most primitive clone of Cabernet Franc, originating in Basque Country

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3
Q

Where did Gewurztraminer originate?

A

Despite the German sounding name, Gewürztraminer is Italian in origin, and is thought to be indigenous to the Alto Adige region of northern Italy. The prefix “gewürz” means spice in German, though the meaning is more along the lines of outrageously perfumed than anything that might come out of a kitchen spice rack. The grape is not actually a distinct variety but rather a pink-berried, highly aromatic clone of Savagin, one of the ancient so-called “founder varieties.”
(Karen McNeil)

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4
Q

Pelaverga

A

There’s only about 20ha in the world planted, most concentrated in the village of Verduno.

Light tannin, sappy red fruit, peppery spice - a very easy-drinking red.
-Burlotto
-Castello di Verduno
-Fratelli Alessandria

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5
Q

What is the name of Gamay’s teinturier mutation?

A

Gamay de Bouze

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6
Q

Viviser

A

An old name for Chasselas, used in and around Baden

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7
Q

PIWI

A

Pilzwiderstandsfähige Rebsorten: Fungus-resistant grape varieties aka HYBRIDS
* associated with Germany
* adaptability, sustainability

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8
Q

What is the French term equivalent of PIWI?

A

ResDur (Résistances Durables - a program started in 2000)

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9
Q

Scion

A

the above the ground portion of a grafted vine

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10
Q

Canes and spurs

A

canes = shoots grown in previous season that have lignified/turn brown. 1-4ft long after pruning

spurs = canes trimmed to a few inches

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11
Q

Cordon

A

Permanent horizontal extension of the trunk with a number of spur positions located along them

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12
Q

Vitis vinifera’s parent species?

A

Vitis Sylvestris
(both belong to family Vitaceae)

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13
Q

Canopy

A

refers to all vegetative growth that occurs during the growing season

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14
Q

Suckers

A

shoots sprung from dormant buds on older wood - do not usually produce fruit and are typically removed earlier in spring

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15
Q

inflorescences

A

flower clusters that resemble immature grape clusters. Appear in the beginning of the season
*initiated during the previous growing season

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16
Q

Rachis

A

The stem holding the cluster of potential grapes

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17
Q

Ampelography

A

The science of identifying grape varieties based on morphology
- clusters/berries shape & size
- leaf characteristics
- overall growth patterns

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18
Q

Xylem

A

Carries water and nutrients from roots throughout the vine

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19
Q

Phloem

A

carries sugar from the leaves throughout the plant

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20
Q

ATP

A

adenosine triphosphate: usable energy created through respiration, occurs in every part of the plant including roots both day and night. Uses oxygen, releases CO2

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21
Q

Photosynthesis

A

Plant takes in CO2 through stomates (microscopic pores in leaves)
*releases water through stomates (transpiration)
*stomates close during periods of stress to conserve water - stops photosynthesis and slows respiration

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22
Q

Vine Vigor

A

refers to vegetative growth produced by the vine. Assessed by:
*shoot length/diameter
*number of shoot’s per vine
*tendency to produce laterals/suckers

Quantified by pruning weight - material removed

Excessive growth is bad for quality/quantity. Too much energy to canopy, not enough on fruit development.
Too much canopy = not enough light, buds aren’t as productive and are more disease prone

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23
Q

Ravaz Index

A

A measurement of vine balance: considers ratio of fruit weight to pruning weight
*healthy range is 4 to 10

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24
Q

3 common rootstock species

A

Vitis rupestris
Vitis riparia
Vitis berlandieri

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25
Q

2 main genus of family Viticeae?

A

Vitis
Muscadinia

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26
Q

Crossing vs Hybrid

A

the offspring of 2 varieties belonging to same species (Riesling etc)

Hybrids are interspecies crossings

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27
Q

What species of grape vine typically shows foxy aromas?

A

Vitis Labrusca

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28
Q

Proles Pontica

A

3 main proles (Pontica, Occidentalis, Orientalis) - primary centers of cultivation

Aegean/Black Sea
Vermentino, Zin, Furmint, etc
*jagged leaves, white hair underside, midsized clusters & small/med berries

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29
Q

Proles Occidentalis

A

3 main proles (Pontica, Occidentalis, Orientalis) - primary centers of cultivation

Western Europe
Chard, Riesling, Pinot,etc
*convex leaves, small compact bunches, small round berries

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30
Q

Proles

A

Proles (latin) = scion, offspring; grape variety classification by Dr. Negrul

Orientalis: Caucasus; Cinsault, Muscat
Pontica: E. EU; Harsevelu, Furmint, Clairette
Occidentalus: IT, FR, etc. Chard, Merlot, etc

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31
Q

Tannin expression related to moisture

A

Water stressed grapes = more tannin
*even after accounting for berry size

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32
Q

Monoterpenes

A

compounds responsible for flavors of rose, lychee, and orange blossom

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33
Q

Clones

A

Variants within a grape variety that differ slightly in terms of morphology or behavior

*mutations are caused by errors in cell division and genetic variation is the result

*viral infection affects gene expression - another source of mutation

(all of the Pinot’s are technically clones of Pinot Noir; Gewurz is a genetic mutation of Sauvignon Blanc)

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34
Q

Give 3 examples of American hybrid varieties

A

Clinton
Catawba
Delaware
Herbemont
Isabella
Niagara
Noah
Norton

Purpose of American hybrids was to adapt to fiercely cold winters and hot disease-prone summers

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35
Q

Give 3 examples of French hybrids

A

Goal was to resist pests and diseases around time of phylloxera and downy mildew. Covered 1/3 of French vineyard by 1950’s.

Baco Noir and Blanc
Chambourcin
Chancellor
Couderc Noir
Marechal Foch
Plantet
Villard Noir and Blanc
Seibel
Seyval Blanc
Vidal Blanc

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36
Q

Vitis Riparia rootstock
- downfalls

A

riparia = native to riverside areas. Shallow fibrous roots.
*not drought tolerant
*does not do well in lime soils
*low vigor, earlier ripening

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37
Q

Vitis Rupestris rootstock

A

Shrubby vine native to American South
* loves rocky creek beds and low-nutrient soils
* extensive root system is good for drought tolerance and searching for water
* vigorous; large canopy on fertile soils
* tolerant of nematodes/viruses

Ex: St. George

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38
Q

Vitis berlandieri rootstock

A

Native to Texas and deep limestone soils
* good choice for alkaline soils
* deep roots = some drought resistance
* later ripening, variable phylloxera tolerance

Does not root from dormant cutting - so all rootstock from this species will never be pure belandieri

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39
Q

EU Climate Zone A

A

Ex: Germany (except Baden), Austria, Loire, Champagne, Alsace

Can adjust alcohol levels up to 3%
Can deacidify - cannot acidify

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40
Q

Köppen-Geiger

A

Climate classification
5 main groups:
tropical, dry, temperate, continental, polar
* further divided based on temp and precipitation patterns

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41
Q

Vine growth occurs in what temperature range

A

50 to 95º F
(mid-70’s is optimal)

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42
Q

Winkler Index

A

Categorizes viticultural areas with similar accumulation of “growing degree days” from April 1 to October 31

*(daily avg temp - 50ºF) for every day 4/1 - 10/31 is totaled up

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43
Q

How many leaves does it take to ripen a cluster?

A

12 - 16

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44
Q

Min. # of sunshine hours/year to ripen Vitis Vinifera?

A

1250 hours

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45
Q

General latitude range for growing vines?

A

30 to 50

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46
Q

Inversion layer

A

An imaginary boundary which cold air is trapped under a layer of warm air
*causes frost events

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47
Q

Methods to mitigate frost

A
  • site selection: cold air settles in low-elevations; bowls with no means of draining air are especially frost prone
  • varietal selection: don’t plant early budding varieties in frost prone places
  • air circulation: mow cover crops
  • sprinklers: water freezing can warm the vines a few degrees; constantly applying water during frost event
  • Heat: smudge pots, small fires
  • Pruning methods: leave a long spur or prune late to use “sacrificial buds”
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48
Q

At what temp do dormant vines risk freeze damage? Mitigation methods?

A

5ºF and below. Most can survive to 0 but most risk death if they go below
1. burying the canes or the base of the vine
2. geothermal, geotextile blankets

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49
Q

Hail prevention?

A

Netting or canyons to disrupt air patterns

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50
Q

Drought friendly rootstock?

A

St. George, 110R, and 140R

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51
Q

Sunburn mitigation techniques

A
  1. clay-based “sunscreen” on fruit/canopies (Australia)
  2. shade clothes around fruit zone post veraison
  3. sprinklers/misters for evaporative cooling
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52
Q

Loam

A

Soil texture comprised of a blend of different particle sizes, including sand, silt, and clay

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53
Q

Alluvial

A

Soil transported and deposited by (non-marine) surface water. Alluvial deposits have been cemented into rock

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54
Q

Colluvial

A

soil transported by gravity or erosion

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55
Q

Fluvial

A

Soil weathered, transported, and deposited by rivers and streams

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56
Q

Calcareous

A

Alkaline soil with a high proportion of calcium or magnesium carbonates
- cool, good water retention
- lower temps = delay ripening
- Agrillaceous = calcareous clay

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57
Q

pH

A

is a scale of acidity that ranges from 0 (very acidic) to 14 (very basic), with water considered neutral at a pH of 7

*Soils described as acidic have a pH below 6.5, neutral soils are 6.5 to 8, and alkaline (basic) soils are over 8

58
Q

Alkaline soil types

A

pH 8.5 or higher = alkaline
calcareous soils including limestone, chalk, tufa, marlstone, and marble

59
Q

Acidic soil types

A

asalt, sandstone, shale, slate, and schist tend to be more acidic

60
Q

Most important soil-derived nutrients for a vine?

A

nitrogen
phosphorus
potassium
(macronutrients)

61
Q

6 soil-derived macronutrients important to viticulture

A

Nitrogen
phosphorus
Potassium
sulfur
calcium
magnesium

62
Q

Nitrogen

A

Controls growth and development. The most significant thing for development, quality and yields.
*deficiency: low vigor; chlorosis in older leaves

63
Q

Phosphorous
- purpose
- what causes deficiency

A

Required for energy transport and storage
*deficiency is rare except on acidic soils. Low yields, yellow and red patches

64
Q

Potassium

A

Regulates water movement in and out of cell, essential for deacidification during ripening, important for red color development
*deficiency = low yields, low pH

65
Q

Calcium

A

Maintains integrity of vine’s structure
*deficiency is rare except on acidic soils

66
Q

Magnesium

A

Component of chlorophyl. Important for photosynthesis and ripening.
*deficiency = reduced sugar accumulation in fruit

67
Q

Chlorosis

A

Yellowing of the leaves along the vein or inside the leaf margin. Negatively affects quality of canopy shade.

Caused by:
1. nitrogen deficiency
2. iron deficiency
3. lime heavy soils

68
Q

Why are grapevines not propagated from seed?

A

DNA is recombined during fertilization; vines grown from seed might have some things in common with parent vine but will basically be a new variety with little in common.

seeds of self-pollinating vines are highly inbred and prone to recessive-type diseases; many are nonviable or non-fruiting

69
Q

Clonal Selection vs Massal Selection

A

Clonal = cutting from a single parent vine. The goal is to replicate the traits of that vine across the vineyard. Might create a more even, easy-to-manage vineyard

Massal Selection = cutting taken from multiple plants across vineyard that may have undergone small mutations.
** Increased genetic diversity, possibly more disease resistance; potentially, more wine complexity

70
Q

Provignage
- method
- examples

A

Traditional propagation method.
* a shoot from a grown vine is laid down into the ground, where it roots and forms a new vine that may be separated from the mother vine
* cheap, “easy”, but can only be done in phylloxera-free soils

Ex: Bollinger’s Clos Chaudes Terres and Clos Saint-Jacques for Vieilles Vignes Francais

71
Q

Bench Grafting

A

Bench grafting: dormant rootstock and scion are grafted together at nursery, usually by machine.

  • Graft wound is wrapped and stored in warm humid room to callus for a few months. Then sealed with wax and stored in cold room until ready to plant
    OR
  • planted in a pot after callusing, grown in greenhouse, and sold as green-growing bench graft aka potted vine (less expensive, mature 1 year earlier than dormant bench grafts)
72
Q

Field Grafting

A

Rootstock is planted and grows for a season. Scion is grafted on top either in fall or following spring.
*chip-budding: very small pieces of the cutting and one bud are inserted into the rootstock

73
Q

Chip-budding

A

Very small pieces of cuttings containing a single bud are inserted into the rootstock

*done during field grafting as the scion is being grafted onto the planted rootstock

74
Q

2 methods of grafting vines

A

Field grafting: happens in the field; more expensive - but cost is spread over two intervals. Requires skilled labor, has higher failure rate, but vines have a more stable root system at time of grafting and may have more longevity

Bench grafting: happens in the nursery; easier, less expensive, and only successful vines are planted

75
Q

FPS

A

Foundation Plant Services
*the major US nursery to legally import cuttings. They must certify that the cutting is pest/disease free

76
Q

Row Orientation

A

N-S: both sides of vine subject to equivalent duration of sunlight throughout day. BUT west side fruit may be subject to more afternoon heat

E-W: canopy intercepts max amount of sunlight all day but very different exposure on north vs south side of vine

NE-SW: modern method for warmer regions - max light interception + ideal shading during hottest parts of day

77
Q

Modern vineyard architecture for warmer regions?

A

NE-SW: modern method for warmer regions - max light interception + ideal shading during hottest parts of day

78
Q

Typical yield from 1 ton of fruit

A

120–160 gallons of wine ≈ 50–70 cases

79
Q

J-rooting

A

common cause of young vine decline; happens when vines are planting with their rootstock bent upwards

80
Q

Cordon-trained

A

Cordon-trained, spur-pruned
*1- 4 cordons attached to trunk with regular permanent spur positions
*shoots grow from spurs each season - then are trimmed back after harvest
* Vine looks identical season after season

PROS: good for warmer regions; easy, fast, cheapest to prune; even shoot development, clear fruit zone; more permantent wood = better nutrient, water storage

CONS: more vigor = wider spacing; takes extra year to establish; not good for varieties like Nebbiolo/Carmenere that have low fertility in bud close to cordon; buds push at same time so can be risky for frost

81
Q

Kicker Canes

A

Sacrificial canes; method used for spur-trained vines to mitigate frost risk and control vigor

  • kicker cane shoots will go through budbreak 1st bc they were there 1st.. delay budbreak in the remaining spurs then removed after risk passes
82
Q

Head-Trained, Cane-Pruned

A

Ex: Guyot

1 spur for each fruiting cane attached directly to the head - called replacement/renewal spurs
* shoots form on each bud along spur/cane
* the grower selects a new fruiting cane (the baguette) and lays it down during pruning to be next year’s cane - removing the cane from the previous season

83
Q

Baguette (pruning term)

A

Applies to head-trained, cane-pruned vines - the new fruiting cane that will be laid down during pruning to produce fruit the following year, while the grower cuts back the previous year’s cane

84
Q

Pros and cons of cane-pruned vines

A

PROS
* less permanent wood & fewer reserves = more suited for high density plantings
* more productive than spur-trained vines
* fewer pruning cuts = less prone to fungal diseases that enter through pruning wounds

CONS
* requires skilled pruning labor
* not suitable for mechanization
* budbreak and development are uneven along the cane
* susceptible to winter freeze since buds are further from permanent wood

85
Q

Head-trained
- type of pruning
- examples/explanation
- pros and cons

A

Spur-pruned
Ex: bush, gobelet
No trellis. Many spur positions on arms that form the vine’s head. Spur positions are restored at pruning

*typical to warm, dry places with limited water availability
*cost effective - no trellis/wires to manage. Canopy work is minimal. Pruning becomes easier over time.
However..
*least productive, cannot mechanize. bunches are prone to crowding

86
Q

Sylvoz

A

Cordon-trained, cane-pruned
*used on high yielding varieties/sites
* large number of fruiting shoots during the growing season

87
Q

What happens when you train vitis vinifera downward?

A

Vitis vinifera likes to grow vertically - training downward is a method to devigorate

88
Q

VSP

A

Vertical Shoot Positioning
*non-divided canopy, 1 fruit zone
* shoots are trained vertically and compressed into a single wall
*ideal for high density plantings
*works well for lower vigor vines. Good light interception, good airflow, good for anti-fungal spray coverage

Canopy on higher vigor vines may become too dense/humid. A spreader bar might be used to spread canopy and give fruiting zone space

89
Q

California Sprawl

A

TRELLIS SYSTEM

2-wire system: fruiting wire, foliage wire. Shoots grow up and sprawl over foliage wire. Self-shading, dense canopy, simple and mechanizable

Typical in CA Central Valley’s high-yielding vineyards. Suitable for hot climates.

90
Q

Divided Canopy Trellis System

A

Good for high vigor sites. Spreads out the canopy to provide more space and avoid crowding. Multiple fruit zones = sometimes uneven ripening

Ex: Lyre, Geneva Double Curtain, Wye, Scott Henry, Smart-Dyson

91
Q

Pergola

A

Good for high vigor, high production varieties
* max. light interception + max. fruit zone protection
* good airflow = reduces fungal pressure in humid areas

92
Q

1st event of the growing season?

A

Budbreak - happens when temps near 50º

débourrement

93
Q

Weeping

A

Occurs during budbreak as sap is being transported from roots to buds to initiate shoot growth after dormancy.

Weeping = sap is being pushed through pruning wounds during this process

94
Q

What does it mean for buds to “push”

A

During budbreak - compressed shoots stored inside the buds start to grow
*buds located further from the ground push first (apical dominance)

95
Q

Timeline for bloom?

A

occurs 6-8 weeks after budbreak; lasts 1-3 weeks

96
Q

Fruit Set

A

Fertilized flowers turn into berries. First glimpse of season’s possible yield. May/November
*1/3 of flowers turn into berries in favorable circumstances
* couloure occurs here - due to carbohydrate imbalance in vine, or bc berries simply fall off or fail to set properly

97
Q

Coulure

A

Shatter: large amount of berries are unsuccessfully fertilized and few berries form
*cold weather and varietal tendencies are to blame (Merlot, Grenache susceptible)

[other irregular outcome:
Hen and Chicken: berries contain different numbers of seeds resulting in differing berry size - often result of nutrient deficiency and stress. Detrimental to yields but not necessarily to quality]

98
Q

Millerandage

A

Hen and Chicken: berries contain different numbers of seeds resulting in differing berry size - often result of nutrient deficiency and stress. Detrimental to yields but not necessarily to quality

[other irregular outcome: Shatter: large amount of berries are unsuccessfully fertilized and few berries form
*cold weather and varietal tendencies are to blame (Merlot, Grenache susceptible)]

99
Q

Veraison

A

Berry colors change. 4-6 weeks post flowering. Vine switches from growth and development to focus on fruit.

100
Q

When does pruning occur?

A

during winter dormancy and before budbreak
(December and March)

101
Q

Spur-pruned

A

short permanent fruiting positions (“spurs”) are maintained on a main structural arm (cordon, cane).

Annual renewal: each year, the spurs grow shoots & fruit. They harvest and are pruned back.

102
Q

Cane-pruning

A

Buds that grow into fruiting shoots come from a single cane rather than multiple spurs.
*Guyot is a type of cane-pruning

103
Q

Guyot

A

A cane-pruning method

*producer selects 1 cane that will be kept and used as the fruiting cane the next year (the baguette) and 1 cane is trimmed into the renewal spur

*the cane is bent and tied to support wire - then the rest of last year’s growth is trimmed off

104
Q

Cane Cracking

A

Vine is tied in an arch - good for varieties where the middle buds struggle to push
*Nebbiolo, Riesling

105
Q

Leafing

A

Removing leaves from dense canopies.
* Reduces disease pressure
* Done anytime after fruit set, but earlier is better.
* oft removed on morning side, left on afternoon side

106
Q

Dropping fruit’s effect on ripening?

A

Dropping fruit speeds up ripening - so in marginal climates, this helps ripen. In warmer places, it leads to uneven ripening as sugar outpaces tannin/flavor development

107
Q

Relationship between large yields and environment

A

*Warmer climates support higher yields: increased rate of ripening can support more fruit
* larger vines on rich soil can support ripening at higher yields while small vines on weak soil cannot
* higher density = lower per vine yield but higher yield overall
* consider the wine style - acid retention is more important for sparkling and white wines aka higher yields can be more appropriate

108
Q

Cover crop’s relationship with frost?

A
  • Bare soil is warmer but cool off faster. Better airflow
  • Cover crops are cooler during day but take longer to cool off at night since airflow is impeded
  • cold air can be trapped in tall cover crop = frost risk. Mowing after budbreak mitigates that
109
Q

Cover Crop Benefits

A

Goal: optimize water / nutrients avl to the vine, limit erosion, build soil organic matter, influence microclimate

*legumes add nitrogen to soil
*brassicas control nematode population
* grasses with high water requirements devigorate via competition
* limit winter erosion, mitigate compaction, soak up excess spring moisture

110
Q

Pros and cons of tilling

A

Turning over of top 6 - 10in
*PROS: add fertility to soil through green manure, reduce competition between vine and cover crop, reduce rodent population

*CONS: encourages erosion, destroys soil structure, disrupts soil microbial communities, brings carbon to the surface

111
Q

Mulching

A

mowing or crimping cover crop to create a “carpet” over vineyard that discourages weeds from growing
*helps conserve moisture, cool ground temp, and encourage soil bacteria

112
Q

Alternatives to herbicide

A
  1. Low-growing perennial cover crop like clover that outgrows weeds
  2. Mechanical cultivation - French plow or other implement that scrapes top of soil to remove weeds/plants
113
Q

Phylloxera

A

Phylloxera Vastatrix
*yellow root louse
*feeds on vine roots. Creates punctures that allow soil pathogens to infect, causing necrosis and prevents healthy uptake of water and nutrients. A slow death.
*doesn’t like sandy soils/places that flood (incl. flood irrigation)

114
Q

Nematodes

A

Feed on roots, eventually disrupting water and nutrient uptake
*Dagger nematode: vectors fan leaf virus
*certain cover crops (Mustard) are toxic to them; leaving land fallow for several years helps

115
Q

Mealybugs in the vineyard

A

Vector leafroll virus
(Dagger nematode vectors fan leaf virus, glassy-winged sharp shooters = Pierce’s disease)

116
Q

Glassy-winger sharpshooters in the vineyard

A

Vector Pierce’s Disease
(Dagger nematode vectors fan leaf virus, mealybugs vector leafroll virus)

117
Q

Methods for insect infestations

A

*relocate host plant outside of vineyard to divert insects
*ladybugs to feed on immature aphids and leafhoppers
* pheromones for mating disruption
* and… pesticides

118
Q

Wildlife prevention in the vineyard

A

*bird nets
*fencing
*early ripening “sacrificial” varieties
* noise emitters
* Scarecrows

119
Q

Powdery Mildew

A

Oidium (Erysiphe necator)
Fungus - prefers damp 70 -85ºF to spread. Spreads via wind
*detrimental from budbreak to veraison
*treated with systemic fungicides or sulfur sprays, BDX mixture
*Serenade, Sonata = organic biological fungicides

120
Q

What are Serenade and Sonata?

A

Organic biological fungicides
* treats oidium

121
Q

Downy Mildew

A

Mildiou in French (Plasmopara viticola)
*prefers 65 - 77º. Only spreads through water… so places with rainy growing seasons are naturally more susceptible
* cripple shoots and leads to defoliation which shuts down the vine
*treatable with Bordeaux mixture

122
Q

Botrytis-susceptible varieties?

A

Spores get trapped in tight bunches during bunch closure. Dense, shady, humid canopies foster disease.

Tight bunched varieties: Chard, Riesling, Pinot, Zin, Chenin, Sauv Blanc

*many red varieties have compounds that fight botrytis in skins

123
Q

Eutypa Dieback

A

Caused by Eutypa Lata. Trunk disease, fungal spores enter through pruning wounds.
* affects a single spur position before moving through vine
* stunted shoots, shriveled fruit, and small, cup-shaped, chlorotic leaves

124
Q

Esca

A

Trunk disease, fungal spores enter pruning wounds
* black measles on berries
* distinct tiger-striped leaves with scorching along the margins

125
Q

Pierce’s Disease

A

Xylella fastidiosa
*Bacteria. Infects Xylem, prevents transport of water
*vectored by sap-feeding insects like sharpshooters and spittlebugs
*symptoms: delayed budbreak, stunted growth, fruit dehydration, uneven lignification
*vine typically dies in 2 - 5 years

126
Q

Grapevine Yellow

A

Phytoplasmic diseases
* phytoplams = specialized type of bacteria that infect vine’s phloem
* Flavescence doree
* Leafhoppers are primary vector

127
Q

Crown Gall

A

Bacteria
*infects graft site - galls form at graft union and girdle the vine

128
Q

Examples of viral grapevine diseases

A

Fanleaf Virus
Leafroll Virus
Red Blotch Disease

129
Q

How long for transition from conventional to organic certification?

A

Min. 3 years

130
Q

Biodynamic certifications?

A

Demeter
Biodyvin
respekt-BIODYN

131
Q

Regenerative Farming

A

Next frontier of organic farming.
Beyond “do no harm” - actively improving the land through soil building, nurturing microbial ecosystems, and advancing the health of the vineyard

**ultimate goal is to reduce climate change through carbon sequestration
**focus is on management of the vineyard floor

132
Q

Examples of Sustainable Certifications

A

Sonoma County Sustainable
Napa Green
Lodi Rules
SIP Certified
LIVE
Porto Protocol

133
Q

Integrated Pest Management

A
  • exploits predator-prey / host relationships habitat manipulation
  • physical barriers
  • biological interventions like mating confusion
134
Q

Suckering

A

Removing weak, sick, or poorly located vine shoots that grow from latent buds on the trunk and cordon

135
Q

French term for pruning

A

taille

136
Q

French term for rootstock

A

porte-greffe

137
Q

shot berries

A

Small, hard, green berries that contain no seeds

138
Q

Biodynamic Preparations

A

BD500, BD501, BD508 are field sprays
BD502 - 507 are compost treatments

500: manure
501: silica paste
502: yarrow flowers
503: chamomile flowers
504: stinging nettles
505: oak bark
506: Dandelion flowers
507: Valerian flowers
508: Horsetail Plant

139
Q

“Active lime” in calcareous soils

A

Portion of the soil that is highly reactive - readily dissolves and participates in chemical reactions in soil
* increases soil alkalinity
* more alkaline soils = nutrient deficiencies, chlorosis, reduced vine growth & yields
* very dry soils

140
Q

French term for MOG

A

Corps Etranger

Continuing Studies (79 decks)

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