observed in commercial orchards in Thiva County (southern Greece). The total rainfall in April and May was 70 and 11 mm respectively (April rainfall was high compared to the 18 year average of 25.72 mm). The mean temperature ranged from 5.2-24.6°C in April (very low for the first 15 days) and 11.0-29.7°C in May. On affected trees, young shoots were wilted, with shrivelled leaves remaining on the shoots (Fig. 1).