A plant pathogen is a living being that causes an illness on a plant. In spite of the fact that family members of some plant pathogens are human or animal pathogens, most plant pathogens just harm plants. Some plant pathogens can make insusceptible discouraged individuals wiped out, in any case. These are designated "trans-kingdom" pathogens. In contrast to human, plants are once in a while restored of ailment. Rather, plant pathologists attempt to keep plants from becoming ill in any case, and work to control the indications and spread of sicknesses. Organisms that causes infectious disease incorporate growths, oomycetes, microorganisms, infections, viroids, infection like living beings, phytoplasmas, protozoa, nematodes and parasitic plants. Excluded are ectoparasites like creepy crawlies, parasites, vertebrate, or different bugs that influence plant wellbeing by eating of plant tissues. Plant pathology likewise includes the study of pathogen identification, disease etiology, infection cycles, financial effect, plant sickness the study of disease transmission, plant ailment obstruction, how plant ailments influence people and creatures, pathosystem hereditary qualities, and the board of plant illnesses.