About the book: 1985 / The book is dedicated to the ability of plants to protect themselves from infectious diseases caused by phytopathogenic fungi and bacteria. The protective mechanisms of phytoimmunity are described in detail. Particular attention is paid to the first phase of the relationship between the parasite and the host, i.e., the recognition phase, on which it largely depends on whether the plant remains healthy or gets sick. A system of measures is proposed to maximize the use of the potential capabilities of plants. The book is intended for biochemists, biologists, and agricultural workers.