Abstract

Symptoms of wilting, resembling those incited by Ralstonia solanacearum, were observed in February and April 2007 on tomato (Lycopersicon esculentum) cvs Arawak, Ikram and Cuore di bue, growing in five greenhouses in Southern Sardinia (Italy). At first affected plants showed collapse of the growing apex. Stunted lateral shoots emerged but then wilted and died while adventitious roots appeared on the stems. Cross sections of stems showed brown discoloration of the vascular tissue and oozed a dirty white exudate. In April, when environmental conditions were warmer, wilting of the whole plant occurred rapidly. The percentage of wilted plants ranged from 10 to 70%.

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