Plant Pathology
Fungi, oomycetes, bacteria, viruses, viroid, virus-like organisms, phytoplasmas, protozoa, nematodes, and parasitic plants are some of the organisms that cause infectious disease. Ectoparasites, such as insects, mites, vertebrates, and other pests that devour plant tissues, are not mentioned. Pathogen identification, disease etiology, disease cycles, economic effect, plant disease epidemiology, plant disease resistance, how plant diseases affect humans and animals, path system genetics, and plant disease management are all part of the field of plant pathology.