Abstract
Broadly defined, disease is any physiological abnormality or significant disruption in the normal health of a plant that changes its appearance or function. Due to viruses, bacteria or fungi and favored by certain environmental conditions (nutrient deficiency, soil degradation, water problems, climate change, etc.) and certain pests (sometimes playing a role of vector), plant diseases are sources of considerable economic losses for agriculture and forestry, and as such studied by plant pathology or phytopathology.
Keywords: Controlling methods, Diagnosis, Economic impact, Non parasitic plant disease, Parasitic plant disease, Symptoms.