The low temperatures from 2020, which registered large differences compared to the multiannual averages, and with a low water regime inspired us to follow the dynamics of several diseases in Timiș County, including localities from all existing relief areas in the county, from the areas from meadow to mountainous mountainous areas. Among the winter wheat diseases studied was yellow rust produced by Puccinia striiformis West.At the entrance to the autumn wheat field, observations were made in seven localities, in each locality in three different fields determinations were made of the frequency and intensity of the attack of the fungus from 5 metric frames, to the standard leaf (F) and to the third leaf below the standard (F-3) on the diagonal of the fields. The degree of attack was calculated at the office and the resulting data were interpreted statistically. The comparisons were made with the average degree of attack in all localities.In order to be able to collect as much data as possible in the chosen localities, observations were made on several diseases. The localities were: Foieni, Clopodia Ştiuca, Poieni, Bethausen, Murani and Beba veche Unlike Septoria tritici Rob. and Desm. which is a great lover of cold climate, the fungus Puccinia striiformis West. which produces the yellow rust of winter wheat is thermophilic, so that the degree of attack on the F-3 leaf was low, and on the standard leaf it was almost non-existent.

Autumn wheat, Puccinia striiformis, yellow rust, Timiş county

biology

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