The three D's: Diseases, disease triangle and diagnosis

摘要

The disease triangle is a concept used by plant pathologists to explain factors necessary for disease to occur. Disease will only occur when a virulent pathogen is present, the plant is susceptible to the pathogen and the environment is conducive fordisease. If one of the three components is absent, then disease will not occur. That is why when we think about preventing plant diseases, we should keep the disease triangle in mind. Ask ourselves, which parameters can we control?