Plant Diseases

36. What is a common symptom of downy mildew in plants?

a) Yellowing of leaves

b) Wilting

c) White powdery growth on leaves

d) Black spots on leaves

37. Which of the following is a bacterial disease affecting apples?

a) Late blight

b) Apple scab

c) Citrus canker

d) Root rot

38. Rust is a common fungal disease that affects which part of the plant?

a) Leaves

b) Roots

c) Flowers

d) Fruits

39. What is a common symptom of root rot in plants?

a) Yellowing of leaves

b) Wilting

c) Stunted growth

d) Black spots on leaves

40. Fusarium wilt is a fungal disease that affects which plant?

a) Apples

b) Wheat

c) Roses

d) Potatoes