The field research was conducted at the Agricultural Advisory Center in Łosiów (opolskie providence) in 2011–2012. The objective of the experiment was the assessment of the effectiveness of the use of bio-stimulators and ploughing down stubble crop to reduce the infection of spring wheat stem base and its roots by pathogens occurrence. It was established that ploughing down stubble crop of phacelia as well as the use of bio-stimulators did not significantly affect the infection of roots and stems of spring wheat grown in monoculture. The continuous crop of spring wheat instead of environmentally correct crop succession increased of roots and stem base diseases.