Plant Pathology — MCQs Biology

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1. Plant pathology is the study of:





2. A disease-causing organism is called:





3. Which of the following is a biotic cause of plant disease?





4. Which of the following is an abiotic cause of plant disease?





5. The study of fungi is called:





6. Which group of pathogens causes rust diseases in plants?





7. Smut diseases are caused by:





8. Late blight of potato is caused by:





9. Citrus canker is caused by:





10. Which disease is caused by a virus?





11. Tobacco mosaic virus mainly attacks:





12. Wilting of plants is commonly caused by:





13. Which organism causes root-knot disease?





14. Nematodes belong to phylum:





15. Powdery mildew appears as:





16. Downy mildew differs from powdery mildew because it grows mainly on:





17. Which disease causes galls in plants?





18. Crown gall disease is caused by:





19. Which bacterium causes crown gall disease?





20. Plant viruses are usually transmitted by:





21. Aphids commonly transmit:





22. Which insect acts as a vector?





23. Leaf spot disease affects mainly the:





24. Rust disease of wheat is caused by:





25. Which disease affects vascular tissues?





26. Fusarium wilt is caused by:





27. Blight disease results in:





28. Early blight of potato is caused by:





29. Which plant disease spreads rapidly in humid conditions?





30. Which method helps prevent plant diseases?





31. Removal of infected plants is known as:





32. Use of disease-resistant varieties is an example of:





33. Which chemical is commonly used to control fungal diseases?





34. Bordeaux mixture is used to control:





35. Which disease shows mosaic pattern on leaves?





36. Chlorosis in plants indicates deficiency of:





37. Which nutrient deficiency causes leaf scorching?





38. Seed treatment helps in controlling:





39. Which pathogen lacks cellular structure?





40. Viral diseases cannot be controlled by:





41. Quarantine is used to prevent:





42. Which practice reduces disease incidence in crops?





43. Which disease causes black powdery masses in grains?





44. Which pathogen survives in soil for long periods?





45. The sudden death of seedlings is called:





46. Damping-off disease mostly affects:





47. Which disease causes sunken lesions on stems?





48. Which environmental condition favors bacterial diseases?





49. Integrated disease management involves:





50. The main aim of plant pathology is to:





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