History of plant pathology Early Observations (Antiquity - 17th Century): Plant diseases have been recognized since ancient times. Early civilizations, such as the Greeks and Romans, made observations about plant ailments and their effects on agriculture. Theophrastus (c. 371 - c. 287 BC), often called the "Father of Botany," wrote about plant diseases and pests in his works, including "Enquiry into Plants." 17th - 18th Century: In the 17th century, with the advent of the microscope, scientists began to make more detailed observations of plant diseases. Notable figures include Marcello Malpighi and Robert Hooke, who made significant contributions to the study of plant anatomy and pathology. 19th Century: The 19th century saw the emergence of the field of plant pathology as a distinct discipline. Notable figures include Anton de Bary, a German botanist who is often considered the father of modern plant pathology. De Bary's work on the potato late blight pathogen (Phytophthora infestans) is particularly famous. Late 19th - Early 20th Century: The discovery of the causative agents of various plant diseases, including fungi, bacteria, and viruses, accelerated during this period. Notable milestones include the identification of the fungus responsible for the Irish potato famine (Phytophthora infestans) and the