WSET DIPLOMA D1 VITICULTURE.
EXAM QUESTIONS AND ANSWERS.
VERIFIED 2025/2026.
Factors important in rootstock selection - ANS resistance to pests
suitability to soil texture, depth and fertility
compatible with soil's salinity, pH, lime content
anticipated soil water availability, drainage
vigour moderation or enhancement
Rootstocks resistant to root-knot nematodes - ANS Ramsey and Dog Ridge (both vitis
champini)
Rootstocks resistant to draught - ANS 110 R(ichter), 140 R(uggeri)
hybrids of v. rupestris and v. berlandieri
they root deeply and quickly
Rootstocks tolerant to waterlogged soils (high rainfall/soils retaining water) - ANS v. riparia
(Riparia Gloire)
Rootstocks tolerant to salinity in soils - ANS 1103 Paulsen
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Rootstocks tolerant to acidic soils - ANS 99 Richter
110 Richter
hybrids of v. rupetris and v. berlandieri
Main grape varieties - ANS vitis vinifera (native to Eurasia)
Vitis Riparia
v. Berlandieri
v. rupestris
above mainly used for rootstocks
Anatomy of the vine: main elements - ANS roots
permanent wood (trunk)
one year old wood
main shoots
Structure of the shoots - ANS Main shoots
the stem
nodes
canes - lignified green shoots
buds
petiole (leaf stalk)
kinds of buds - ANS Compound buds (latent buds) - break open in the following season
Prompt buds - form and break in the same growing season, produce lateral shoots
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, canopy elements - ANS lateral shoots
tendrils
leaves
inflorences
bunches
grapes (pulp, skin seeds)
Vine propagation - ANS 1. Cutting - allows usage of rootstocks, can be treated for disease
2. Layering - burying a cane and cutting it off once it establishes root; cannot be grafted
Why use different clones? - ANS yields
berry size
resistance to disease
skin thickness
Mass selection (Selection Massale) - ANS growers cultivate their own cuttings
expensive and labor intensive, takes a long time
What is a cross? - ANS when parents of the variety are of the same species (Pinot
Noir+Cinsault=Pinotage)
What is a hybrid? - ANS When parents are of different species (Ugni Blanc+Seibel=Vidal
Blanc)
Vine growth cycle - ANS Dormancy (jan-march/may-sept)
Budburst (march-april/sept-oct)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
EXAM QUESTIONS AND ANSWERS.
VERIFIED 2025/2026.
Factors important in rootstock selection - ANS resistance to pests
suitability to soil texture, depth and fertility
compatible with soil's salinity, pH, lime content
anticipated soil water availability, drainage
vigour moderation or enhancement
Rootstocks resistant to root-knot nematodes - ANS Ramsey and Dog Ridge (both vitis
champini)
Rootstocks resistant to draught - ANS 110 R(ichter), 140 R(uggeri)
hybrids of v. rupestris and v. berlandieri
they root deeply and quickly
Rootstocks tolerant to waterlogged soils (high rainfall/soils retaining water) - ANS v. riparia
(Riparia Gloire)
Rootstocks tolerant to salinity in soils - ANS 1103 Paulsen
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,Rootstocks tolerant to acidic soils - ANS 99 Richter
110 Richter
hybrids of v. rupetris and v. berlandieri
Main grape varieties - ANS vitis vinifera (native to Eurasia)
Vitis Riparia
v. Berlandieri
v. rupestris
above mainly used for rootstocks
Anatomy of the vine: main elements - ANS roots
permanent wood (trunk)
one year old wood
main shoots
Structure of the shoots - ANS Main shoots
the stem
nodes
canes - lignified green shoots
buds
petiole (leaf stalk)
kinds of buds - ANS Compound buds (latent buds) - break open in the following season
Prompt buds - form and break in the same growing season, produce lateral shoots
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, canopy elements - ANS lateral shoots
tendrils
leaves
inflorences
bunches
grapes (pulp, skin seeds)
Vine propagation - ANS 1. Cutting - allows usage of rootstocks, can be treated for disease
2. Layering - burying a cane and cutting it off once it establishes root; cannot be grafted
Why use different clones? - ANS yields
berry size
resistance to disease
skin thickness
Mass selection (Selection Massale) - ANS growers cultivate their own cuttings
expensive and labor intensive, takes a long time
What is a cross? - ANS when parents of the variety are of the same species (Pinot
Noir+Cinsault=Pinotage)
What is a hybrid? - ANS When parents are of different species (Ugni Blanc+Seibel=Vidal
Blanc)
Vine growth cycle - ANS Dormancy (jan-march/may-sept)
Budburst (march-april/sept-oct)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
