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Pest and disease control techniques for aphids, red spiders, scale insects, damping-off, rust and powdery mildew on flowers
In spring, the temperature turns warm then cold again, and the air humidity is high. At present, the occurrence of crop pests and diseases is at a moderate to severe level, and flowers also suffer from many pests and diseases. Generally, the following are more serious in April and May: damping-off, when the temperature reaches 20°C