Growing Futures

Controlling black spot

Low residue apples for export

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Controlling black spot

The fungal disease black spot (Venturia inaequalis) costs around $1200 per hectare each season to control. The Apple Futures programme has integrated several areas of research to ensure growers can meet the minimal residue fruit standards and still control black spot. A weather-based disease forecasting model now provides growers with accurate information about disease risk - based on the environmental conditions, the risk of infection, spore availability, seasonal susceptibility of trees and pre-harvest interval – allowing them to target fungicide use to periods of high disease risk and control black spot with minimal risk of chemical residues.