EN
Pot experiments were carried out in 2008 and 2009. Into the soil were introduced microorganisms: Heterodera schachtii (10 or 5 cysts in 100 g of soil) and Penicillium frequentans. The following parameters were taken into account in interpretation of the experiment: concentration of H. schachtii cysts in 100 g of soil, concentration of eggs and larvae in 1g of soil and fertility of females. The research was carried out in accordance with the rules adopted in nematology.