WSET DIPLOMA D1 PRACTICE
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Canopy management includes:.
Answer: Trellising, Training,Pruning,leaf removal, crop thinningOptimizing
the ratio of light that reaches the fruit
◍ Define continentality.
Answer: measure of the difference between the annual mean temps of the
hottest and coolest months
◍ Pruning.
Answer: Removal of unwanted leaves, canes and permanent wood in winter
or during growing season. Spur pruning (1 yr old wood is cut back to 2-3
buds)Replacement cane pruning (canes have 8-20 buds)
◍ How does sunburn changes grapes (5)?.
Answer: Scars on the skins of grapesIn extreme cases deathBrowning of the
grapeCausing a bitter tasteIncreased risk of rot
◍ Hazards to the vine.
Answer: droughtexcess of wateruntimely
rainfallfreezefrostshailsunburnfiresmoke taint
◍ Microbiological stability.
Answer: Sterility or resistance to microbial growth is retained according to
the specified requirements. Antimicrobial agents that are present retain
effectiveness within the specified limits.
◍ How is pierce's disease spread?.
Answer: By the sharpshooter insect (glassy-winged)
,◍ Why use different clones?.
Answer: yieldsberry sizeresistance to diseaseskin thickness
◍ Aims of canopy management..
Answer: light interception by leavesreducing or creating shadeproviding
uniform microclimatepromoting air circulationarranging canopy to ease
harvest
◍ Name 9 hazards to the growing environment.
Answer: DroughtExcess of waterUntimely
rainfallFreezeFrostsHailSunburnFireSmoke taint
◍ Grapevine yellows (bacterial).
Answer: no treatment availablespread by LEAFHOPPERS or untreated
stock from nurseriesFlavescence Dorée - most common in Europe, delays
budburst, drooping posture, canopy turning yellow for white and red for
black grapesMGMT: no control for disease, control the vector by
insecticides, bathe pruning wood in hot water to kill the disease
◍ Disadvantages of biodynamic viticulture.
Answer: extra costs and labor
◍ What conditions are favorable to downy mildew?.
Answer: Rainfall and warm temperatures (20°C / 68°F) to spread. High risk
periods are warm springs and stormy but warm summers.
◍ What are the 2 most common nemotode?.
Answer: Root-knotDagger
◍ What does grey rot do to a vine?.
Answer: Cause significant damage to fruit
◍ What is one of the most widespread vine diseases?.
Answer: Powdery mildew
◍ Fanleaf Virus.
Answer: fanleaf degenerationearly shoot growth is stunted, leaves are pale
and malformedspread by dagger nematodeMGMT: no cure, removal of
, affected vines, planting virus tested materials
◍ Forms of weed management.
Answer: cultivation (ploughing)herbicidesanimal grazingcover
cropsmulching
◍ How is grapevine yellows spread?.
Answer: Spread by vectors, which include leafhoppers, Nurseries selling
untreated, diseased stock.
◍ What is the impact of windless nights on frost?.
Answer: Allows a layer of freezing cold air to develop above the surface of
the soil
◍ must adjustments.
Answer: enrichmentchaptalisationreducing
alcoholacidification/deacidification
◍ What climate is most susceptible to freeze.
Answer: Strongly continental climate (Canada, Washington State, China)
◍ Disadvantages of hand harvesting.
Answer: expensiverequires available skilled workforce - problematic
especially where labor is scarcehas to be carried out during the day
◍ What damage can hail do?.
Answer: Damage young shoots and leavesDamage grapes and open for
diseasesYield reduction
◍ Types of filtration.
Answer: Depth filtrationSurface filtration
◍ How do mammals damage vineyards.
Answer: Eat the grapesDamage the grapes and allow bacteria and fungi
◍ Wine components.
Answer: wateralcoholacidssugarwin aromaticsglycerolphenolics
◍ What is the most common grapevine yellows in Europe?.
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Canopy management includes:.
Answer: Trellising, Training,Pruning,leaf removal, crop thinningOptimizing
the ratio of light that reaches the fruit
◍ Define continentality.
Answer: measure of the difference between the annual mean temps of the
hottest and coolest months
◍ Pruning.
Answer: Removal of unwanted leaves, canes and permanent wood in winter
or during growing season. Spur pruning (1 yr old wood is cut back to 2-3
buds)Replacement cane pruning (canes have 8-20 buds)
◍ How does sunburn changes grapes (5)?.
Answer: Scars on the skins of grapesIn extreme cases deathBrowning of the
grapeCausing a bitter tasteIncreased risk of rot
◍ Hazards to the vine.
Answer: droughtexcess of wateruntimely
rainfallfreezefrostshailsunburnfiresmoke taint
◍ Microbiological stability.
Answer: Sterility or resistance to microbial growth is retained according to
the specified requirements. Antimicrobial agents that are present retain
effectiveness within the specified limits.
◍ How is pierce's disease spread?.
Answer: By the sharpshooter insect (glassy-winged)
,◍ Why use different clones?.
Answer: yieldsberry sizeresistance to diseaseskin thickness
◍ Aims of canopy management..
Answer: light interception by leavesreducing or creating shadeproviding
uniform microclimatepromoting air circulationarranging canopy to ease
harvest
◍ Name 9 hazards to the growing environment.
Answer: DroughtExcess of waterUntimely
rainfallFreezeFrostsHailSunburnFireSmoke taint
◍ Grapevine yellows (bacterial).
Answer: no treatment availablespread by LEAFHOPPERS or untreated
stock from nurseriesFlavescence Dorée - most common in Europe, delays
budburst, drooping posture, canopy turning yellow for white and red for
black grapesMGMT: no control for disease, control the vector by
insecticides, bathe pruning wood in hot water to kill the disease
◍ Disadvantages of biodynamic viticulture.
Answer: extra costs and labor
◍ What conditions are favorable to downy mildew?.
Answer: Rainfall and warm temperatures (20°C / 68°F) to spread. High risk
periods are warm springs and stormy but warm summers.
◍ What are the 2 most common nemotode?.
Answer: Root-knotDagger
◍ What does grey rot do to a vine?.
Answer: Cause significant damage to fruit
◍ What is one of the most widespread vine diseases?.
Answer: Powdery mildew
◍ Fanleaf Virus.
Answer: fanleaf degenerationearly shoot growth is stunted, leaves are pale
and malformedspread by dagger nematodeMGMT: no cure, removal of
, affected vines, planting virus tested materials
◍ Forms of weed management.
Answer: cultivation (ploughing)herbicidesanimal grazingcover
cropsmulching
◍ How is grapevine yellows spread?.
Answer: Spread by vectors, which include leafhoppers, Nurseries selling
untreated, diseased stock.
◍ What is the impact of windless nights on frost?.
Answer: Allows a layer of freezing cold air to develop above the surface of
the soil
◍ must adjustments.
Answer: enrichmentchaptalisationreducing
alcoholacidification/deacidification
◍ What climate is most susceptible to freeze.
Answer: Strongly continental climate (Canada, Washington State, China)
◍ Disadvantages of hand harvesting.
Answer: expensiverequires available skilled workforce - problematic
especially where labor is scarcehas to be carried out during the day
◍ What damage can hail do?.
Answer: Damage young shoots and leavesDamage grapes and open for
diseasesYield reduction
◍ Types of filtration.
Answer: Depth filtrationSurface filtration
◍ How do mammals damage vineyards.
Answer: Eat the grapesDamage the grapes and allow bacteria and fungi
◍ Wine components.
Answer: wateralcoholacidssugarwin aromaticsglycerolphenolics
◍ What is the most common grapevine yellows in Europe?.
