NEW BIOPREPARATIONS CREATED ON TO BASIS O F MICROBIAL STRAINS - ANTAGONISTS TO THE CUCUMBER ROOT-ROT PATHOGENS

Following parameters of the application of the mixture of alirin B and alirin S were studied in greenhouse experiments: severity of cucumber root rots; development of the treated plants; structure of soil micro bial associations. The essential diminishing of the disease severity o f the treated plants has been demonstrated for two years. Besides, the treatment of plants with the mixture of biopreparations stimulated pl ant development and resulted in the yield increasing (up to 100%). The application of biopreparations shifted the ratio between antagonistic and phytopathogenic microbes in soil and led to the increasing of ant agonistic species.