What action is recommended to prevent seedling damping-off in seed trays?

What action is recommended to prevent seedling damping-off in seed trays?

• A. Keep seeds in darkness for germination
• B. Use sterile starting mix, provide proper spacing, ensure adequate air circulation, and maintain controlled moisture
• C. Overwater seedlings to ensure moisture
• D. Apply fertilizer immediately after sowing

Answer: (B)

Damping-off happens when soilborne pathogens thrive in wet, crowded, and poorly ventilated conditions around young seedlings. The best way to prevent it is to reduce pathogen exposure and keep the seedling environment from staying too wet. Using a sterile starting mix lowers the chance of introducing fungi and oomycetes that cause damping-off. Providing proper spacing prevents crowding, which reduces humidity buildup around plants and helps each seedling dry more quickly. Adequate air circulation lowers leaf and surface moisture, cutting down on the conditions that let pathogens attack the stems. Maintaining controlled moisture means watering so the medium stays evenly moist but never soggy, avoiding waterlogged soils that foster the disease. In practice, this means gentle, even moisture management (often bottom watering or allowing the top to dry slightly between waterings), plus clean media and good ventilation. Avoid overwatering, and remember that fertilizer right after sowing doesn’t address the damping-off risk and can stress seedlings.

Damping-off happens when soilborne pathogens thrive in wet, crowded, and poorly ventilated conditions around young seedlings. The best way to prevent it is to reduce pathogen exposure and keep the seedling environment from staying too wet.

Using a sterile starting mix lowers the chance of introducing fungi and oomycetes that cause damping-off. Providing proper spacing prevents crowding, which reduces humidity buildup around plants and helps each seedling dry more quickly. Adequate air circulation lowers leaf and surface moisture, cutting down on the conditions that let pathogens attack the stems. Maintaining controlled moisture means watering so the medium stays evenly moist but never soggy, avoiding waterlogged soils that foster the disease.

In practice, this means gentle, even moisture management (often bottom watering or allowing the top to dry slightly between waterings), plus clean media and good ventilation. Avoid overwatering, and remember that fertilizer right after sowing doesn’t address the damping-off risk and can stress seedlings.