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Vineyard
Powdery mildew
The vine disease that likes it warm and moderately humid and wants no leaf wetness at all.
Erysiphe necator. Its optimum sits roughly at 20 to 30 °C and 60 to 90 % humidity — which is exactly where downy mildew is held back.
That is why an indicator that stirs the two into one figure is worthless: a dry, hot spell lowers one risk and raises the other.
Related terms
EPPO code
A five-letter code that identifies plants and pests unambiguously across borders.
Downy mildew
The vine disease that needs wetness, warmth and time all at once.
Botrytis
Grey rot — dangerous from bunch closure onwards, when the inside of the bunch stops drying out.
Risk indicator
The calculated infection risk per disease and parcel, shown as a colour band.
These terms in daily use, not in a glossary.
The tour shows where each of them turns up in VINORUM — in sixteen units at your own pace.
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