WSET DIPLOMA D2 CERTIFICATION
COMPREHENSIVE TEST QUESTIONS AND
CORRECT ANSWERS GRADED A+
⩥ Four main sections of a grape vine.
Answer: the main shoots, one-year-old wood, permanent wood and the
roots
⩥ What comprises the canopy of a vine?.
Answer: The main shoots and all of their major structures - stem, buds,
leaves, lateral shoots, tendrils and inflorescences/grape bunches
⩥ What do the main shoots grow from, and when?.
Answer: The main shoots on the vine grow in spring from buds retained
from the previous year
⩥ Where are carbohydrates stored in a vine?.
Answer: Stems, trunks, roots
⩥ Define lignify.
Answer: Green shoots become woody and rigid, they are then called
canes
,⩥ Where do buds form?.
Answer: between the leaf stalk (petiole) and the stem
⩥ Define the two types of buds.
Answer: - Compound buds (form in one growing season and break open
the following growing season, producing main shoots; typically a
primary, secondary, and maybe tertiary)- Prompt buds (form and break
open same season, form lateral shoots)
- Prompt buds (form and break open same season, form lateral shoots)
⩥ What is the main function of lateral shoots? When are they
desirable/undesirable?.
Answer: - to allow the plant to carry on growing if the tip of the main
shoot has been damaged or eaten
- can provide an additional source of leaves for photosynthesis (useful if
the laterals are near the ends of the main shoots)
⩥ What is second crop?.
Answer: Lateral shoots often produce inflorescences, which can be
known as a 'second crop'
- Growth of laterals nearer the base of the main shoot can be undesirable
as they impede air flow and can shade the fruit too much
⩥ What is green harvesting?.
,Answer: Removal of second crop during summer
⩥ Define one-year-old wood.
Answer: the main shoots from the last growing season that were kept at
pruning, supports compound buds; cane or spur
⩥ Define permanent wood.
Answer: woody parts of the vine that are older than one year, including
the trunk
⩥ where are most roots found?.
Answer: top 50cm of soil
⩥ what distinguishes PN clone 115?.
Answer: low yield, small grapes, good for high quality of red wines
⩥ what distinguishes PN clone 521?.
Answer: high yield, bigger grapes, good for sparkling wine production
⩥ When is leaf fall and dormancy?.
Answer: Nov-March
, ⩥ When is budburst?.
Answer: March-April
⩥ When is shoot and leaf growth?.
Answer: March-July
⩥ When is flowering and fruit set?.
Answer: May-June
⩥ When is grape development?.
Answer: June-Oct
⩥ When is harvest?.
Answer: Sept-Oct
⩥ 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?.
COMPREHENSIVE TEST QUESTIONS AND
CORRECT ANSWERS GRADED A+
⩥ Four main sections of a grape vine.
Answer: the main shoots, one-year-old wood, permanent wood and the
roots
⩥ What comprises the canopy of a vine?.
Answer: The main shoots and all of their major structures - stem, buds,
leaves, lateral shoots, tendrils and inflorescences/grape bunches
⩥ What do the main shoots grow from, and when?.
Answer: The main shoots on the vine grow in spring from buds retained
from the previous year
⩥ Where are carbohydrates stored in a vine?.
Answer: Stems, trunks, roots
⩥ Define lignify.
Answer: Green shoots become woody and rigid, they are then called
canes
,⩥ Where do buds form?.
Answer: between the leaf stalk (petiole) and the stem
⩥ Define the two types of buds.
Answer: - Compound buds (form in one growing season and break open
the following growing season, producing main shoots; typically a
primary, secondary, and maybe tertiary)- Prompt buds (form and break
open same season, form lateral shoots)
- Prompt buds (form and break open same season, form lateral shoots)
⩥ What is the main function of lateral shoots? When are they
desirable/undesirable?.
Answer: - to allow the plant to carry on growing if the tip of the main
shoot has been damaged or eaten
- can provide an additional source of leaves for photosynthesis (useful if
the laterals are near the ends of the main shoots)
⩥ What is second crop?.
Answer: Lateral shoots often produce inflorescences, which can be
known as a 'second crop'
- Growth of laterals nearer the base of the main shoot can be undesirable
as they impede air flow and can shade the fruit too much
⩥ What is green harvesting?.
,Answer: Removal of second crop during summer
⩥ Define one-year-old wood.
Answer: the main shoots from the last growing season that were kept at
pruning, supports compound buds; cane or spur
⩥ Define permanent wood.
Answer: woody parts of the vine that are older than one year, including
the trunk
⩥ where are most roots found?.
Answer: top 50cm of soil
⩥ what distinguishes PN clone 115?.
Answer: low yield, small grapes, good for high quality of red wines
⩥ what distinguishes PN clone 521?.
Answer: high yield, bigger grapes, good for sparkling wine production
⩥ When is leaf fall and dormancy?.
Answer: Nov-March
, ⩥ When is budburst?.
Answer: March-April
⩥ When is shoot and leaf growth?.
Answer: March-July
⩥ When is flowering and fruit set?.
Answer: May-June
⩥ When is grape development?.
Answer: June-Oct
⩥ When is harvest?.
Answer: Sept-Oct
⩥ 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?.
