The 'bakanae' (foolish seedling) disease of ______ seedlings was caused by a fungal pathogen Gibberella fujikuroi.

Correct option is D

The 'bakanae' disease primarily affects rice seedlings and is caused by the fungal pathogen Gibberella fujikuroi. It leads to abnormal elongation of seedlings due to the production of gibberellic acid by the fungus.

Information Booster

1. Symptoms include stunted growth and pale-green seedlings.
2. Diseased plants are often taller than healthy ones, appearing "foolish."
3. The fungus survives in infected seeds or soil.
4. The disease is more prevalent in areas with high humidity.
5. Seed treatment with fungicides can reduce its spread.
6. The disease significantly impacts rice yield.

Additional Knowledge

• (a) Apple: Prone to diseases like scab and powdery mildew, but not bakanae.
• (b) Lemon: Affected by citrus canker and gummosis, unrelated to Gibberella fujikuroi.
• (c) Wheat: Affected by rust and smut diseases but not bakanae.
• (d) Rice: Correct answer; bakanae is specific to rice seedlings.