1, do a good job in planting planning and intensive cultivation. It is best to plant parsley and celery on plots that have not been planted for 3 years to prevent soil-borne diseases such as plant rot. The selected plots should be intensively cultivated, fully applied with organic fertilizer and phosphate fertilizer, weeded, crushed and coarsely crushed, compacted at the interface, leveled and watered.

2. Seed treatment: select high-quality varieties, soak the seeds in 15℃-20℃ clear water for/2-24 hours (changing water once in the middle), take them out, control the excess water, put them in a wet bag, then put them in into the pit for a day and night, and then mix them with 800 times of lipid film solution (seed dressing with high-tech lipid film can drive away the underground)

3. Seedling management: water coriander every 3-4 days after emergence to maintain a reasonable water content. In winter, greenhouse planting should pay attention to reasonably adjusting the temperature (the growth temperature is limited to 3℃-20℃), which can improve the disease resistance, reduce the dosage of pesticides and fertilizers, reduce the residual poison and improve the high-quality commodity rate.

4. Temperature: Although coriander is cold-resistant and can grow at MINUS several degrees, coriander is not heat-resistant. If the growth temperature is always high, it will stop the growth of coriander seedlings. If the coriander doesn't germinate after several days of planting, it means that the temperature is wrong.

5. Pest control: The diseases of coriander include early blight, late blight, Sclerotinia sclerotiorum, gray mold, soft rot, virus disease and plant rot. According to the characteristics of aphids, whiteflies, silkworms and other diseases and insect pests, focusing on prevention, combining prevention with control, and applying advanced lipid film while spraying targeted pesticides can effectively improve the efficacy and consolidate the control effect.