Mycology MCQs (Quiz 17) Posted on July 8, 2026Author agropublishers 0 1. Plant galls can be induced by which of the following organisms? Bacteria All of these Viruses Nematodes 2. The powdery mildew pathogen of mango primarily survives between growing seasons in ______________ Living twigs and dormant tissues of mango Mango plant debris Alternate hosts Dead twigs of mango 3. Serological methods used for the detection of plant viruses primarily identify viral ________________ Capsid protein Nucleic acid Nucleoprotein Host ribosomes 4. Plant galls are abnormal growths resulting from __________________ Mineral deficiency Natural aging Abnormal cell growth induced by other organisms Water deficiency 5. In plant pathology, synergism refers to a situation in which tow pathogens ___________ Benefit each other without affecting the host Together cause greater disease severity than either pathogen alone Have no interaction with one another Cause no disease when present together 6. Tobacco Mosaic Virus (TMV) is capable of surviving for many years in infected plant debris and contaminated materials primarily because it __________________ Was the first virus to be discovered Is resistant to all disinfectants Has a high thermal inactivation point and exceptional stability Is stable under all environmental conditions 7. Disease resistance in plant pathology is primarily a characteristic of the ___________ Pathogen Host plant Environment Pathogen and host equally 8. Downy mildew diseases derive their name from the characteristic __________________ Development of symptoms only on the lower surface of leaves Downy, cotton-like growth of the pathogen on infected plant surfaces Occurrence only on the lower leaves of plants Development of the pathogen exclusively on roots 9. _________________ is a fungal infection of the outer ear caused by Aspergillus Cholera Tetanus Otomycosis Tuberculosis 10. The virulence of a plant pathogen is primarily determined by its ______________________ Combination of environmental factors Genetic makeup of pathogen Environmental conditions alone Genes of the host plant Loading … Question 1 of 10
