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