Coriander, also known as coriander, is a two-year-old vegetable with a wide range of adaptability and can be planted in all seasons. The taproot is thin, the stem is erect and long, and the petiole is short. The top grade is the one with green color, rich aroma, green texture and no yellow rotten leaves. Growers should do a good job in management from the following aspects;

First, do a good job in planting planning and intensive cultivation. To avoid repeated cropping, plant it on the block where coriander and celery 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 phosphorus fertilizer, deeply leveled, smashed and compacted, then leveled and watered.

2. Seed treatment: select high-quality varieties, soak the seeds with15℃-20℃ clean water12-24 hours (change the water once in the middle), take them out, control the excess water, put them in a wet cloth bag, put them in a pit for germination one night, and then mix with 800 times of new high-fat film (seed dressing with new high-fat film) Improve the germination rate of seeds), then sow seeds on the flat border to achieve proper sowing, and cover with thin sand and fine soil to spray 800 times of new high-fat film on the soil surface, which can preserve moisture and prevent evaporation, prevent sun and drought, prevent soil hardening, suffocate and isolate the source of diseases and pests, and improve the emergence rate.

Third, seedling management: after the emergence of coriander, irrigate it with small water once every 3-4 days to maintain reasonable moisture content. In winter, greenhouse planting should pay attention to reasonable temperature adjustment (the growth temperature limit is 3℃-20℃), timely seedling spacing, reasonable plant spacing, and timely and reasonable fertilization and irrigation according to the growth situation. It is necessary to spray Zhuangganling at the beginning of the vigorous period after the seedlings are established, so that the stems can be quickly stout, the leaves are thick, the leaves are fresh and tender, the plants are lush, and the natural taste is strong. At the same time, it can improve the disease resistance, reduce the dosage of pesticides and fertilizers, and reduce the residual toxicity. Improve the quality commodity rate.

Fourth, pest control: the diseases of coriander include early blight, late blight, Sclerotinia sclerotiorum, gray mold, soft rot, virus disease, plant rot, etc., and the pests include aphids, whitefly and leafminer. According to the outbreak characteristics of pests and diseases, prevention should be given priority to, prevention should be combined with control, and new high-fat film should be applied while spraying targeted pesticides, which can effectively improve the efficacy and consolidate the control effect.