Strawberries are produced in open field and under protection. Economically it is the most important soft fruit world wide and is grown from the Mediterranean to the cool climate of Scandinavia or Southern Chile. Nevertheless of the climatic conditions, the grey mould Botrytis cinerea is the most important disease of this fruit. Nearby also powdery mildew and leather berry have some important impact. Powdery mildew occurs under warm and moist conditions with no leaf wetness and rain, where leather berry occurs under rainy conditions in open field production or under irrigation in covered production.
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