Besides disease pressure, the Disease monitor tells you when the weather in the next 48 hours suits spraying. It uses the same forecast as the disease cards (Open-Meteo for your block coordinates), so it needs no sensors and no extra setup.
Where: VineyardElf menu → Disease monitor, the “Spray windows (48 h)” section below the disease cards
What you see
- Next good hour - the first hour from now that meets every condition below.
- List of windows - upcoming stretches of good weather within 48 hours, with date, hours and length. A window is at least two good hours in a row.
- Quality - a 0 to 100 score; the best window is marked.
When there is no good window within 48 hours, the section says so plainly.
What makes an hour good
An hour counts as good when all of these hold at once:
- temperature between 10 and 25 °C,
- wind below 15 km/h (spray drift),
- relative humidity below 80%,
- no rain now and none forecast for the next 6 hours that would wash the treatment off.
How the quality score is built
Four equal parts: temperature close to 17.5 °C, light wind, humidity near 50%, and time of day - best early morning (6-10) and evening (17-20), worse in the middle of the day, worst at night.
What a window does not replace
A window is about weather, not about whether to spray at all. Disease pressure (the cards above), growth stage, the product label and its withholding periods decide that. Record the treatment afterwards in the Spray log - that is the record keeping that regulations ask for.