Viruses, viroids, and prions are all infectious agents, but they differ in their structure and biological properties.They replicate within the host plant's cells and interfere with normal cellular processes, leading to stunted growth, deformities, and reduced crop yields.In summary, viruses are complex infectious agents with genetic material enclosed in a protein coat, viroids are simpler RNA molecules that infect plants, and prions are misfolded proteins that cause neurodegenerative diseases.Viroids only infect plants and cause diseases in crops, such as potatoes, tomatoes, and citrus fruits.Prions can cause rare neurodegenerative diseases in humans and animals, such as Creutzfeldt-Jakob disease (CJD) in humans, mad cow disease in cattle, and scrapie in sheep.Prion: Prions are unique infectious agents that consist solely of misfolded proteins.They do not contain any genetic material.1.2.3.