Vine Protection and Integrated Pest Management
What this domain tests
Vine Protection and Integrated Pest Management tests identification, monitoring and reasoned control of grapevine pests and diseases, with emphasis on thresholds, resistance management, beneficial organisms, authorised products and pre-harvest intervals. The exam favours integrated decisions over calendar spraying.
Key grapevine problems
Downy mildew produces oil spots on leaves and white down on the underside after wet, mild weather. Powdery mildew appears as white powdery growth and can split berries. Botrytis bunch rot is favoured by humid canopies and wounded berries. Esca and trunk diseases cause internal wood decay and sudden leaf symptoms. Grape moth larvae damage berries and create entry points for rot. Mites, mealybugs and phylloxera require separate management; rootstocks are central where phylloxera is a risk.
IPM logic
Integrated pest management combines prevention, monitoring, thresholds and selective control. Canopy management improves airflow and spray penetration. Pheromone traps and weather data support timing. Protectant fungicides are applied before infection; curative products act after infection but have narrower timing windows. Rotate active ingredients and modes of action to slow resistance. Respect label rates, maximum residue limits, re-entry intervals and pre-harvest intervals.
Worked example
After 12 mm of rain at 12 °C and shoots of 10 cm, downy mildew risk is high. A protectant applied before the rain would have covered new growth; after the rain, the grower should assess the infection period, canopy growth and product choice. A systemic or translaminar product may be appropriate within its label window, but the next application should use a different mode of action and respect the pre-harvest interval.
Traps that cost marks
Do not spray by calendar without monitoring. Do not call every white growth powdery mildew; downy mildew appears on leaf undersides. Do not ignore the pre-harvest interval. Do not repeat one mode of action continuously. Do not recommend a product not authorised for grapes.
Key points
- Downy mildew is favoured by wet, mild weather; powdery mildew does not need free water.
- Botrytis risk rises with canopy humidity and berry wounds.
- IPM uses monitoring, thresholds and prevention before chemical control.
- Mode-of-action rotation reduces resistance risk.
- Pre-harvest intervals and label authorisations are legal requirements.
Grape Harvesting
What this domain tests
Grape Harvesting tests maturity assessment, sampling, harvest timing, picking method, fruit hygiene and the logistics that preserve quality from vine to winery. The exam expects a decision supported by several indices, not a single number.
Maturity indices
Sugar, measured as °Brix or potential alcohol, is only one index. Titratable acidity, pH, malic acid, berry weight, seed colour and phenolic maturity all matter. Aromatic white varieties may be picked earlier to retain acidity; red varieties need phenolic ripeness as well as sugar. Sampling must represent the block: collect berries from different positions and both sides of rows, not just the exposed top clusters.
Harvest decisions and methods
Harvest date balances flavour, acid, tannin, weather risk and winery capacity. Rain near harvest dilutes berries and increases rot risk; heat can cause raisining and high pH. Hand picking allows selection and is used on steep or delicate sites. Mechanical harvesting is fast and can work at night, but requires suitable trellis and vineyard layout. Keep fruit cool, avoid crushing, remove leaves and rotten clusters, and deliver promptly.
Worked example
A red block reads 22.5 °Brix, pH 3.35, titratable acidity 6.8 g/L, and 70% brown seeds. The sugar is adequate, but the winemaker wants softer tannins and the weather forecast is dry. Waiting 5–7 days may improve phenolic maturity, but pH may rise above 3.5 and acid may fall too far. The reasoned decision is to sample again in three days and harvest before the pH exceeds the target, not to pick on Brix alone.
Traps that cost marks
Do not equate high Brix with ripe tannins. Do not sample only one cluster or one row. Do not ignore fruit temperature at delivery. Do not recommend mechanical harvesting on a site with unsuitable trellis or slope without qualification.
Key points
- Maturity includes sugar, acid, pH, phenolics and aroma.
- Representative sampling is essential for a harvest decision.
- Red varieties need phenolic ripeness, not only sugar.
- Fruit should be cooled and delivered quickly after picking.
- Weather and winery capacity influence harvest timing.
Post-harvest Handling and Quality
What this domain tests
Post-harvest Handling and Quality tests what happens to grapes after picking: cooling, transport, receival, sorting, oxidation control, sulphur dioxide use and spoilage prevention. The exam focuses on preserving the quality achieved in the vineyard and on practical cold-chain reasoning.
Cooling and transport
Grapes are perishable and respire after picking. High temperature accelerates respiration, microbial growth, oxidation and aroma loss. Ideally, fruit is cooled quickly after harvest, kept cool during transport and delivered within a short time. Harvesting at night or early morning helps. Crushed or split berries release juice and attract acetic acid bacteria and wild yeasts. Ventilated bins, shallow loads and clean equipment reduce temperature build-up.
Receival and sorting
At the winery, fruit is weighed, sampled and sorted. Remove leaves, stems, rotten clusters and foreign material. Sulphur dioxide can be used to inhibit oxidation and unwanted microbes, but excessive SO2 can bleach colour, produce off-flavours and cause health or regulatory problems. The dose depends on fruit condition, pH, temperature and local rules. Clean bins and presses prevent cross-contamination.
Worked example
Grapes harvested at 28 °C are held for six hours before delivery. Respiration and microbial growth are rapid, and oxidation risks increase. A better plan is to pick at night, transport immediately in a refrigerated or well-ventilated vehicle, and keep the fruit at a cool temperature until receival. If the fruit arrives warm and partly crushed, sorting and rapid processing become more important than trying to correct quality later.
Traps that cost marks
Do not treat SO2 as a substitute for hygiene or cooling. Do not assume cold storage improves already damaged fruit. Do not ignore bin cleanliness. Do not confuse grape receival quality control with fermentation management; the exam may ask about both but they are distinct stages.
Key points
- Respiration and microbial growth accelerate at high temperature.
- Night harvesting and rapid cooling protect fruit quality.
- Sorting removes rot, leaves and damaged berries before processing.
- SO2 has benefits and risks and must be used within rules.
- Clean bins and equipment prevent contamination.
Viticulture Economics, Regulations and Safety
What this domain tests
Viticulture Economics, Regulations and Safety tests the business and compliance side of grape growing: costs, gross margins, break-even yield, support schemes, protected designations, labelling rules, plant protection law and worker safety. The exam wants calculations and accurate use of regulatory concepts.
Economics
Variable costs include labour, fertiliser, crop protection, irrigation energy, fuel and seasonal materials. Fixed costs include machinery depreciation, insurance, land charges and permanent labour. Gross margin is output value minus variable costs; it is not profit because fixed costs are excluded. Break-even yield is total costs divided by price per tonne. Price depends on variety, quality, contract and designation.
Regulations and designations
EU wine rules cover planting, labelling, authorised oenological practices and geographical indications. Protected Designation of Origin (PDO) and Protected Geographical Indication (PGI) products must follow their product specifications, including permitted varieties, yields and production methods. Cyprus has designated wine regions and traditional products; growers must check the specification rather than rely on general memory. Plant protection products must be authorised for the crop and used at label rate.
Safety
Pesticide handling requires training, correct PPE, closed mixing systems where available, and respect for re-entry and pre-harvest intervals. Store products securely and dispose of containers according to local rules. Machinery such as tractors, sprayers and harvesters creates entanglement, crushing and noise hazards. Heat stress is a serious vineyard risk in Mediterranean conditions; provide water, shade and work scheduling.
Worked example
A vineyard yields 8 t/ha and grapes sell for €800/t, giving €6,400/ha output. Variable costs are €3,500/ha, so gross margin is €2,900/ha. If total costs including fixed costs are €5,200/ha, profit is €1,200/ha. Break-even yield at €800/t is €5,200 ÷ €800 = 6.5 t/ha. A grower who quotes the gross margin as profit overstates business performance.
Traps that cost marks
Do not confuse gross margin with profit. Do not ignore fixed costs in break-even calculations. Do not assume a PDO label allows any variety or yield. Do not recommend a pesticide without checking authorisation and intervals. Do not treat PPE as optional in hot weather.
Key points
- Gross margin = output value − variable costs.
- Profit also deducts fixed costs.
- Break-even yield = total costs ÷ price per tonne.
- PDO and PGI products must meet their specifications.
- Pesticide authorisation, PHI, re-entry intervals and PPE are legal and safety requirements.