The evolution of Septoria tritici attack to winter wheat in ARDS Simnic area.

Septoria tritici blotch is one of the most important foliar diseases which affected wheat worldwide. The increase in the economic importance of Septoria tritici blotch was largely due to the widespread and rapid replacement of local wheat cultivars with early-maturing, semidwarf cultivars that were susceptible to the pathogen. Twenty-five winter wheat cultivars were evaluated for their reaction to Septoria tritici attack considering their susceptibility and specific stature. Depending on these the cultivars behavior was different. It was observed that the distance between first emerging three to four leaves are similar for short and tall cultivars. In the next growth stages for tall cultivars Septoria progress was lower comparatively with shorter ones because the closeness of the upper leaves to the lower leaves facilitates contact between newly emerging leaves and splashed pycnidiospores. SPC was low for the cultivars for which Septoria progressed only to basal or to the middle leaves, even these cultivars recorded different attack degree values. The correlation coefficient between plants height and disease progress height (cm) was -0.73 showing that disease progress height is higher as plant height is low.