What is damping off in seedlings ? How to control it ? скачать в хорошем качестве

What is damping off in seedlings ? How to control it ?

#dampingoff Damping off is a common disease that affects seedlings, particularly those grown indoors or in overly damp conditions. It refers to the sudden wilting, collapse, and death of young seedlings. Damping off is primarily caused by several types of fungal pathogens, including Pythium, Rhizoctonia, Fusarium, and Phytophthora. The disease typically attacks the stem of the seedling at or just above the soil line. It can occur at any stage of seedling development, from germination to a few weeks after emergence. The fungi responsible for damping off thrive in wet and poorly drained soils, where they infect the seedling and cause rotting of the stem tissue. To control damping off in seedlings, it is important to take preventive measures: Start with clean equipment: Use sterilized or new pots, trays, and seed starting materials to prevent the introduction of fungal spores. Use well-draining soil: Ensure that the potting mix or soil used for seedlings is well-draining to avoid excessive moisture retention. Avoid overwatering: Allow the soil surface to dry slightly between waterings. Overwatering can create a favorable environment for fungal growth. Improve air circulation: Provide adequate space between seedlings to allow air to circulate and reduce humidity around them. Maintain proper hygiene: Keep the growing area clean and free from debris. Remove any infected or dead seedlings promptly to prevent the spread of disease. Use sterile watering practices: Water seedlings from the bottom or use a sterilized watering can to avoid splashing soil onto the stems and leaves. Apply a fungicide: As a preventive measure, you can apply a fungicide specifically labeled for damping off control. Follow the instructions on the product label for application rates and timing. Adjust environmental conditions: Provide appropriate temperature and humidity levels for seedling growth. Avoid extreme temperature fluctuations and high humidity, as these conditions can promote fungal growth. By implementing these preventive measures, you can significantly reduce the risk of damping off in your seedlings and increase their chances of healthy growth