What is it?
Grape Compass is an advanced smartphone application that provides highly reliable, proactive forecasting of fungal disease pressure specifically for vineyard management.
Grape growers wage a constant, expensive battle against devastating fungal infections like Powdery mildew, Downy mildew, and Botrytis bunch rot. Because these diseases can rapidly destroy fruit quality, farmers typically apply chemical fungicides on rigid, preventative schedules, regardless of actual biological threat levels. This blind approach results in massive chemical overdosing, severe environmental pollution, and completely unnecessary labor costs. Grape Compass solves this by translating cutting-edge academic fungal disease models and advanced ensemble weather forecasts into a simple, color-coded calendar. The app accurately predicts exact disease risks up to five days in advance, allowing growers to spray only when scientifically necessary.
Why use it?
Transitioning from blind, calendar-based spraying to data-driven forecasting allows vineyards to slash their chemical fungicide costs by up to 40%. By knowing exactly when a fungal infection is highly probable, vineyard managers can optimize their logistical planning, perfectly timing their labor and machinery deployment. This zero-tolerance approach to disease pressure ensures that the harvest remains completely protected while drastically reducing the chemical residue on the fruit and the surrounding environment. Ultimately, utilizing precise forecasting allows managers to confidently choose between contact or systemic agents and adjust dosages strictly based on the actual, verified risk level.
Key Features
Forecasts Fungal Risks: Predicts the specific threat of Powdery mildew, Downy mildew, and Botrytis bunch rot up to five days in advance.
Simplifies Data Visualisation: Displays daily disease risk pressure through highly intuitive, easy-to-understand color-coded calendars (Green, Orange, Red) via a smartphone app.
Integrates Ensemble Weather: Utilises the best available European Centre for Medium-Range Weather Forecasts (ECMWF) data to ensure highly reliable, robust estimations.
Optimises Spray Cocktails: Empowers managers to accurately decide between specific chemical treatments and adjust precise dosages based entirely on the calculated risk level.
Requires Zero Manual Input: Functions automatically without requiring complex user data input, providing continuous advisories directly to the grower.
Tracks Single Vineyards: Delivers highly localized forecasts tailored to specific single vineyards, allowing for targeted management across diverse geographical estates.
Who is it for?
This disease forecasting application is exclusively designed for commercial grape growers, viticulturists, and winery managers globally. It is heavily utilized by high-profile vineyards in the South African Western Cape and Spain seeking to optimize fungicide applications.
This solution operates entirely as a standalone smartphone application, requiring no in field hardware or manual data entry.
Have you used Grape Compass?
Help the community by sharing how it performed in predicting your specific fungal outbreaks or the impact it had on reducing your seasonal spraying costs. Your experience helps fellow managers make informed choices.




