Lily prefers a cool and humid climate, and should be cultivated in soils with high levels of slightly acidic, fertile, and humus. Requires good drainage, avoid accumulation of water; summer request semi-shade environment, not heat-resistant; avoid continuous cropping. Common diseases include bulb and scale rot, blight, leaf scorch, buds, and flower buds. Bulbs and scales rot disease plants grow slowly, the leaves are pale green. The underground stems exhibit brown, dark brown spots that gradually infect the interior of the stems, causing decay and death of the plants; at the edge of the scales, dark brown spots appear from shallow to deep, and the bulb tissue begins to rot. Prevention and control: (1) Sterilization of seed ball: Put the seed ball in a mixed solution of 600 times liquid of prohexine and 300 times of seedling green, and soak for 3 minutes. The soaking time of the bulb that has already emerged is slightly shorter; (2) Soil Disinfection: Fold the soil 1 to 2 days before sowing, and spray the pesticide pentachlorobenzene or carbendazim (1:2) evenly into the soil; (3) Control the soil temperature and the soil temperature in summer as much as possible reduce. In the early stage of the disease, there were light brown spots on the bulbs, leaves, stems, and young stems of the soil, which affected the growth of the plants. In severe cases, the budding was slow, the young leaves were damaged, the growth was slow, and flowering was poor. Control methods: (1) seed ball and soil disinfection: the method is the same as above; (2) when the disease occurs, it can be controlled by fungicides. In the early onset of leaf scorch, the young leaves curled slightly inwards. After a few days, yellow-green to white spots appeared; in severe cases, the spots turned brown and the leaves bent or even fell off. Prevention and control: (1) Select disease resistant varieties and bulbs with good root system; (2) Before planting, the soil must be moist, the planting depth is appropriate, and the relative humidity is maintained; (3) Keep the temperature low to avoid plant growth. fast. When the buds and flower buds are dried and the flower buds grow to 1 to 2 cm, the flower buds turn pale green, and the stalks and stems have a contraction at the joints, and the flower buds fall. Prevention and control: (1) Select flower species that are not sensitive to light; (2) Apply effective light-filling measures to supplement light from 50% emergence. The daily illumination time should be maintained at 16 hours, with 20 W of light per square meter. It takes about 6 to 7 weeks until flower buds grow, and natural light stops at 16 hours.
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