Bakane disease was caused by

Options

A. Fungal toxin
B. Growth hormone released by fungal infection
C. Change in photoperiod
D. Inadequate nutrients

Answer

### Step-by-Step Solution:

1. **Understanding Bacane Disease**: Bacane disease, also known as Foolish Seedling Disease, is primarily associated with rice plants. It is important to recognize the symptoms and the causative agent of this disease.

2. **Identifying the Causative Agent**: The disease is caused by a fungus known as *Fusarium fujikuroi*. This fungus infects rice seedlings and leads to abnormal growth.

3. **Mechanism of Action**: The infection by *Fusarium fujikuroi* results in the production of a plant growth hormone called gibberellin. This hormone is responsible for the abnormal elongation of the infected seedlings.

4. **Analyzing the Options**:
- **Fungal Toxin**: This option is incorrect as the disease is not primarily caused by a toxin.
- **Growth Hormone Released by Fungal Infection**: This option is correct because gibberellin, a growth hormone produced due to the fungal infection, causes the elongation of the seedlings.
- **Change in Photo Period**: This option is incorrect as the disease is not related to changes in light duration.
- **Inadequate Nutrients**: This option is also incorrect as the disease is not caused by nutrient deficiencies.

5. **Conclusion**: Based on the analysis, the correct answer to the question "Bakane disease was caused by" is **B) Growth hormone released by fungal infection**.