What is the Risk Index?
The Risk Index is a single chart that shows the overall threat level for your vineyard. Instead of checking frost, powdery mildew and grey mould separately, you see one number from 0 to 100%.
A high Risk Index means you need to take action. A low one means you can rest easy.
How to read the Risk Index
| Value | Colour | What it means |
|---|---|---|
| 0-20% | Green | Everything OK, routine monitoring |
| 20-40% | Yellow | Stay alert, keep an eye on forecasts |
| 40-60% | Orange | Elevated risk, consider taking action |
| 60-80% | Red | High risk, act now! |
| 80-100% | Dark red | Critical, immediate response required |
What goes into the Risk Index?
The system gathers data from several sources and calculates a combined indicator:
Disease risk
- Powdery mildew (Gubler-Thomas model)
- Downy mildew (Goidanich/EPI model)
- Grey mould (Broome model)
Frost risk
- Current temperature
- Forecast overnight lows
- Plant growth stage (BBCH)
Other threats
- Water stress
- Extreme heat
- Strong wind
What do I see on the dashboard?
The Risk Index widget shows:
- Large number - the current level (e.g. 45%)
- Coloured background - matches the risk level
- Arrow - the trend (rising/falling)
- Main driver - what has the biggest impact (e.g. “Powdery mildew: 65%”)
- Mini chart - the last 24 hours
Where do I find the details?
Click the widget or go to Analysis > Risk Index. You will see:
- Historical chart - how the risk has changed over time
- Forecast - the projected Risk Index for the coming days
- Component breakdown - how much each factor contributes
How do I set up alerts?
- Go to Settings > Alerts > Risk Index
- Set a threshold (e.g. 50%)
- Choose a channel (SMS/email)
- Save
Tip: Set the threshold at 40-50% - this gives you time to react before the situation becomes critical.
Can I customise the Risk Index?
Yes! Under Settings > Risk Index you can:
- Disable components - e.g. if you are not concerned about frost in summer
- Change weights - e.g. give powdery mildew a higher weight
- Set your own thresholds for individual threats
When is the Risk Index most useful?
- In the morning - a quick check of whether anything needs attention
- Before the weekend - see whether you can safely go away
- During high-risk seasons - spring (frost), summer (disease)