Fungicides are plant-protection agents with an exceptionally wide range of application in agriculture, horticulture, the cultivation of vegetables and ornamental plants, grown both in fields and in greenhouses. Fungicidal agents fight pathogens attacking crops and also serve to prevent diseases through seed / seedling dressing and soil disinfection. By effectively preventing infections, fungicides can prevent or significantly reduce crop losses caused by plant diseases. Fungicides can be used: for the prevention of pathogen infections (contact fungicides) for intervention and the eradication of pathogens (i.e. either to stop the disease development or to prevent secondary infection) (systemic fungicides). The best fungicides are characterised by: high biological activity against pathogens highly selective action low toxicity to non-target organisms and the environment