How Canvas works 
Canvas is a preventive contact fungicide for controlling Phytophthora. Canvas acts on several phases of the fungus's life cycle.
Benefits of applying Canvas
Provides protection against Phytophthora on leaves and tubers. 
No proven resistance.
Highly resistant to leaching.
Ideal for use at tuber formation/flowering.
Secondary action against Alternaria.
Information on the application of Canvas 
Canvas is used preventively, always mixed with another approved product against phytophtora . Maximum 6 applications per season.
Canvas spraying technique 
Spray with sufficient water for good leaf coverage. Canvas becomes resistant to leaching very quickly, in 30 minutes.