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Lily Disease Prevention
Lily thrives in a cool and humid climate, and it should be grown in well-drained, slightly acidic, fertile, and humus-rich soils. The planting area must have good drainage to prevent waterlogging. During summer, lilies prefer partial shade and are not heat-tolerant. It's also important to avoid continuous cropping to maintain soil health.
**1. Bulb and Scale Rot Disease**
This disease causes slow growth and yellowish-green leaves. The underground stems develop brown or dark brown spots that gradually spread inward, leading to rot and plant death. The scales show dark brown spots along the edges, and the bulb tissue begins to decay.
Control: Soak bulbs in a mixture of 600 times diluted prohexine and 300 times diluted seedling green for about 3 minutes. For bulbs that have already sprouted, reduce soaking time slightly. A few days before planting, loosen the soil and mix carbendazim (1:2 ratio) into the ground to prevent infection.
**2. Blight**
In the early stages, light brown spots appear on bulbs, leaves, young stems, and shoots. This can hinder growth and cause delayed sprouting and damaged young leaves. Severe cases result in poor growth and reduced flowering.
Control: Disinfect seeds and soil before planting. Apply fungicides as soon as symptoms appear to manage the disease effectively.
**3. Leaf Burn or Dryness**
Early signs include curled, inward-facing young leaves with yellow-green to white spots. As the condition worsens, these spots turn brown, and leaves may curl or fall off.
Control: Choose disease-resistant varieties with strong bulbs. Ensure the soil is moist before planting, and maintain proper planting depth. Keep relative humidity stable and avoid high temperatures during early growth to prevent excessive growth.
**4. Bud and Flower Bud Drying**
When flower buds reach 1-2 cm in size, they become pale green, and the junction between the stem and the bud tightens, causing the buds to drop.
Control: Select light-insensitive varieties and use effective lighting strategies. Provide supplemental light starting at 50% emergence, maintaining 16 hours of daily light. Use 20 watts per square meter until the buds grow. Continue this lighting for 6–7 weeks, then stop when natural daylight reaches 16 hours.
By following these practices, you can significantly improve the health and productivity of your lily plants. Regular monitoring and timely intervention are key to preventing and managing common diseases.