Correct Option: A. Staking Explanation of the Correct Answer Staking is a method used in tomato cultivation that involves supporting the plants with stakes or trellises. This practice is particularly important for managing diseases, including damping-off, which is a fungal disease that affects seedlings and young plants. Here’s how staking helps control disease:

1. Improved Air Circulation: By staking tomatoes, the plants are elevated off the ground. This elevation allows for better air circulation around the plants, which is crucial in reducing humidity levels. High humidity can create a favorable environment for fungal diseases, including those that cause damping-off.
2. Reduced Soil Contact: Staking keeps the lower parts of the tomato plants off the soil. Many pathogens that cause damping-off thrive in moist soil conditions. By minimizing the contact between the plant and the soil, the risk of these pathogens infecting the plants is significantly reduced.
3. Easier Management: Staked plants are easier to manage in terms of monitoring for disease symptoms. Growers can more easily inspect the plants for signs of disease and take action if necessary, such as applying fungicides or removing affected plants.
4. Better Light Exposure: Staking allows for better light penetration to all parts of the plant. Adequate sunlight is essential for healthy plant growth and can help reduce the incidence of diseases that thrive in shaded, damp conditions.

Explanation of Why Other Options Are Incorrect B. Supplying: This option is vague and does not specify what is being supplied. While supplying nutrients or water is essential for plant health, it does not directly address the control of damping-off disease. Over-supplying water, for instance, can actually increase the risk of damping-off by creating overly moist conditions. C. Thinning: Thinning involves reducing the number of plants in a given area to allow for better spacing. While this can help with air circulation, it is not as effective as staking in preventing damping-off. Thinning alone does not elevate the plants off the ground or significantly reduce soil contact, which are critical factors in controlling this disease. D. Pruning: Pruning is the removal of certain parts of the plant, such as leaves or stems, to improve air circulation and light penetration. While it can be beneficial for overall plant health, it does not specifically target the prevention of damping-off. Pruning is more relevant for managing diseases that affect mature plants rather than seedlings. Summary of Key Points

• Staking elevates tomato plants, improving air circulation and reducing humidity, which helps control damping-off disease.
• It minimizes soil contact, lowering the risk of soil-borne pathogens infecting the plants.
• Staked plants are easier to monitor for disease symptoms and manage overall.
• Other options like supplying, thinning, and pruning do not directly address the specific needs for controlling damping-off in young tomato plants.

By understanding the importance of staking in tomato cultivation, you can effectively manage and reduce the risk of damping-off disease, leading to healthier plants and better yields.