In 2002 on the Ligurian coast , widespread infection of several cultivars , most severely ` Florabella Pink ' and to a lesser extent ` Florabella Gold ' and ` Florabella White ' , resulted in leaf blistering and the development of chlorotic lesions on the leaves , and white patches on the undersides , particularly in areas of poor ventilation .
In 2002 on the Ligurian coast , widespread infection of several varieties , most severely ` Florabella Pink ' and to a lesser extent ` Florabella Gold ' and ` Florabella White ' , resulted in leaf blistering and the development of chlorotic lesions on the leaves , and white patches on the undersides , particularly in areas of poor ventilation .