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