Identification and characterization of plant and animal pathogens. Molecular Virology: classification, isolation and evolution of viruses. Biochemical and molecular methods for studying bacterial and fungal pathogens. The application of molecular biology in disease control. Genetic diversity of microorganisms. Biological control of pests. Genetic control of pests. The study and application of molecular and biotechnological methods for pest control. Biotechnological perspectives in chemical ecology of pests. Hormone-mediated gene expression of insecticidal proteins. Role of biotechnology in IPM. Case studies.