Phytopathogenic background formation in agrophytocenoses

Abstract

Ways of phytopathogenic background formation at crop growing were described. Necessity of pathogen regulation with activation of biocenotical methods in agrocenoses was shown. Rationality of scientific basis development of plant community using to control of microbiota was demonstrated for management of biosecurity in agrocenoses. Infectious plant diseases, including transgenic are hazard pollution of environment along with radionuclides, heavy metals, pesticides. They appear and become significant as a result of imbalance of useful and pathogenic microorganisms. The imbalance is caused by highly resistant or highly susceptible varieties, including transgenic. Highly resistant sorts are strict selection factor for virulent pathotypes of pathogenic microorganisms. They are able to quick resistance overcome, rapid reproduction and cause epiphytotia. Highly susceptible sorts stimulate intensive development of highly and low virulent pathotypes. It also leads to epiphytotia that increases the speed of forming processes and contributes to the appearance of new aggressive pathotypes that are able to overcome the resistance of plants and rapid reproduction.