This course is dealing with all non-infectious plant diseases that are caused by non-biotic factors including light disorder, temperature disorder, water disorder, aeration disorder, nutrient deficient, mineral excess, pollutions, misuse of pesticide, etc. The injury mechanism, plant responses, effects and symptoms caused by them will be introduced. While the adaptation and resistance of plants to these stresses are also included. The application of these knowledges in agro-industries is another point that will be discussed.