Other Plant Disease -- Switzerland
The drastic increase of tomato leaf mould in Switzerland during the last years is due to the emergence of a new race of the causative fungus. Race 2.9 can overcome resistance based on the Cf-9 gene, which is widely used in commercial tomato cultivars.
Leaf mould management is mainly based on use of resistant cultivars. But increasing incidence of the disease points towards failing host resistance in current tomato varieties, which is based on a single gene.
To confirm the presence of a
from HealthMap Global Disease Alerts http://bit.ly/1MD5aI3
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