Objectives of Plant Pathology

The plants are the main source of food, medicine, drugs, wood and shelter, that are very important for human life. The plants are attacked by various pathogens like Mycoplasma, Viruses, Bacteria, Nematodes, insects and fungi. The non-parasitic factors like mineral deficiency, high or low temperature or cold also responsible for diseases in plants. The plants are susceptible for a variety of diseases.