In the growing season of 2007, surveys carried on in eight important plum-producer counties (Central Country, Ýncirliova, Köþk, Nazilli, Buharkent, Çine, and Bozdoðan) of Aydýn Province revealed that plum rust was found in most of the orchards ( 88%). The highest mean disease severity (82.3 lesions per leaf) was found in Ýncirliova County. Of two plum varieties commonly grown in the Province, 'Papaz' was found to be heavily infected and exhibited severe premature defoliation; however 'Bekiroðlu' showed less disease severity and lower leaf fall In 2008, monitoring changes of rust severity throughout the season revealed that the severity was low from mid-May to early-June and sharply increased in late-June, July and August. [ABSTRACT FROM AUTHOR]