6. Powdery mildew is caused by which type of pathogen?
a) Fungus
b) Bacterium
c) Virus
d) Nematode
Answer: a) Fungus
7. Which of the following is a bacterial disease affecting potatoes?
a) Late blight
b) Clubroot
c) Potato scab
d) Root rot
Answer: c) Potato scab
8. Rust is a common fungal disease that affects which part of the plant?
a) Leaves
b) Roots
c) Flowers
d) Fruits
Answer: a) Leaves
9. What is the main cause of root rot in plants?
a) Excessive sunlight
b) Lack of nutrients
c) Overwatering
d) Insect infestation
Answer: c) Overwatering
10. Fusarium wilt is a fungal disease that affects which plant?
a) Tomatoes
b) Wheat
c) Roses
d) Potatoes
Answer: b) Wheat
