1|Page
Solutions WSET Diploma D1 Exam
Questions and Answers Already Graded
A+. 100% Verified ||Verified Exam!!||
Updated Per Latest WSET Guidelines |
Graded A+||Newest Exam!!!
How does the vine support itself during dormancy? -
Answer-starch in the roots, trunk, and branches
Below what temp can vines be severly damaged? die? -
Answer--15C, -25C
What factors determine the timing of budburst? - Answer--
air temp (>10C)
- soil temp (higher encourages earlier budburst)
- variety
- human factors (e.g. winter pruning late -> later budburst)
Why is high continentality good for budburst? - Answer-
marked differences in temp can result in uniform budburst
Chard, PN, Merlot, Grenache are ______ budding -
Answer-early
SB, Cab, Syrah are ________ budding - Answer-late
(need higher temps)
what determines the vigor of a vine? - Answer-rate of
shoot growth
,2|Page
when does the fastest rate of shoot growth typically occur?
- Answer-between budburst and flowering
what could cause low carb levels in roots, trunk, and
branches? - Answer-- excessive leaf removal
- water stress
- mildew
- high crop loads in prev season
what can slow initial shoot growth rates? - Answer-low
carb levels
what supports shoot growth in later stages? - Answer-
photosynthesis
at what point of the vine growing cycle is water stress not
desired? - Answer-late stages of shoot growth (can affect
photosynthesis)
what can stunted shoot growth lead to? - Answer-- weak
shoots
- reduction in leaf number/smaller leaves
- inflorescences that do not flower properly
what can limit bud fruitfulness? - Answer-- low temp
(<25C)
- water stress
- shading
- nutrient deficiency
,3|Page
how long after budburst does flowering typically take
place? - Answer-8 weeks (temp dependent)
why are warm conditions (>17C) desired during flowering?
- Answer-speeds up flowering (occurs within a few days)
what % of flowers become grapes typically? - Answer-30%
what temp does pollen germination require? - Answer-26-
32C
what negatively affects pollen tube growth? - Answer-
wind, rain, cold temps; wind, water stress, hot temps
define coulure - Answer-A condition of the grape bunch in
which fruit set has failed for a high proportion of flowers.
This occurs when ovule fertilisation is unsuccessful, and
therefore no grape develops.
what causes coulure? - Answer-imbalance in carb levels
due to:
- low photosynthesis rates
- vigorous shoot growth diverting carbs (very fertile soils,
vigorous rootstocks)
define millerandange - Answer-A condition of the grape
bunch in which there is a high proportion of seedless
grapes.
what causes millerandange? - Answer-cold, wet, windy
weather at pollination and fruit set
, 4|Page
what elements develop in grapes during stage 1 of grape
formation and development? - Answer-- tartaric and malic
- some aroma compounds and aroma precursors
(methoxypyrazines)
- tannins (promoted by sunshine on grapes - sunscreen)
during stage 1 of grape formation and development sugar
levels are ______, water flow is _______ & provided by
the ________. - Answer-- low
- high
- xylem
too much _________ & __________ can prolong stage 1
of grape formation and development because
_____________. this can delay _____________. -
Answer-- water
- nitrogen
- these will encourage shoot growth instead
- onset of the ripening stage
During stage 1 of grape formation and development, mild
water stress can ___________________ and lead to the
production of _______________ grapes. - Answer-- speed
up this stage
- smaller
shoot growth _______________ during stage 1 of grape
formation and development. - Answer-continues but slows
Solutions WSET Diploma D1 Exam
Questions and Answers Already Graded
A+. 100% Verified ||Verified Exam!!||
Updated Per Latest WSET Guidelines |
Graded A+||Newest Exam!!!
How does the vine support itself during dormancy? -
Answer-starch in the roots, trunk, and branches
Below what temp can vines be severly damaged? die? -
Answer--15C, -25C
What factors determine the timing of budburst? - Answer--
air temp (>10C)
- soil temp (higher encourages earlier budburst)
- variety
- human factors (e.g. winter pruning late -> later budburst)
Why is high continentality good for budburst? - Answer-
marked differences in temp can result in uniform budburst
Chard, PN, Merlot, Grenache are ______ budding -
Answer-early
SB, Cab, Syrah are ________ budding - Answer-late
(need higher temps)
what determines the vigor of a vine? - Answer-rate of
shoot growth
,2|Page
when does the fastest rate of shoot growth typically occur?
- Answer-between budburst and flowering
what could cause low carb levels in roots, trunk, and
branches? - Answer-- excessive leaf removal
- water stress
- mildew
- high crop loads in prev season
what can slow initial shoot growth rates? - Answer-low
carb levels
what supports shoot growth in later stages? - Answer-
photosynthesis
at what point of the vine growing cycle is water stress not
desired? - Answer-late stages of shoot growth (can affect
photosynthesis)
what can stunted shoot growth lead to? - Answer-- weak
shoots
- reduction in leaf number/smaller leaves
- inflorescences that do not flower properly
what can limit bud fruitfulness? - Answer-- low temp
(<25C)
- water stress
- shading
- nutrient deficiency
,3|Page
how long after budburst does flowering typically take
place? - Answer-8 weeks (temp dependent)
why are warm conditions (>17C) desired during flowering?
- Answer-speeds up flowering (occurs within a few days)
what % of flowers become grapes typically? - Answer-30%
what temp does pollen germination require? - Answer-26-
32C
what negatively affects pollen tube growth? - Answer-
wind, rain, cold temps; wind, water stress, hot temps
define coulure - Answer-A condition of the grape bunch in
which fruit set has failed for a high proportion of flowers.
This occurs when ovule fertilisation is unsuccessful, and
therefore no grape develops.
what causes coulure? - Answer-imbalance in carb levels
due to:
- low photosynthesis rates
- vigorous shoot growth diverting carbs (very fertile soils,
vigorous rootstocks)
define millerandange - Answer-A condition of the grape
bunch in which there is a high proportion of seedless
grapes.
what causes millerandange? - Answer-cold, wet, windy
weather at pollination and fruit set
, 4|Page
what elements develop in grapes during stage 1 of grape
formation and development? - Answer-- tartaric and malic
- some aroma compounds and aroma precursors
(methoxypyrazines)
- tannins (promoted by sunshine on grapes - sunscreen)
during stage 1 of grape formation and development sugar
levels are ______, water flow is _______ & provided by
the ________. - Answer-- low
- high
- xylem
too much _________ & __________ can prolong stage 1
of grape formation and development because
_____________. this can delay _____________. -
Answer-- water
- nitrogen
- these will encourage shoot growth instead
- onset of the ripening stage
During stage 1 of grape formation and development, mild
water stress can ___________________ and lead to the
production of _______________ grapes. - Answer-- speed
up this stage
- smaller
shoot growth _______________ during stage 1 of grape
formation and development. - Answer-continues but slows
