Porażenie bulw Streptomyces scabies 37 odmian ziemniaka w zmiennych warunkach stopnia zakwaszenia i składu chemicznego gleby

An analysis of tubers infection with a scab was elaborated on a ground of a strict field experiment made in Eield Experimental Station, Parczew in 1990 - 1992. The experiment was set by means of randomized blocks. We studied 37 potato cultivars of all earliness groups. Streptomyces scabies infected tubers in an neutral reaction soil to the higher extent. The percentage of infected tubers with Streptomyces scabies was depended more than their infection level on the soil acidity. Tubers infection level was mostly modified by mean soil temperature just alter tubers setting.