Technical measures for pollution-free garlic production

1. Select improved varieties of garlic. Yousuo and Dengchuan precocious garlic in winter and spring are mainly "Red Seven Star" varieties in Wenjiang, Sichuan Province, while Shandong "White garlic" varieties are mainly used in Sanying garlic.

2. Sowing at the right time: when garlic is planted, the dry land is sown from September 10 to 30, and the paddy field is sown from October 1 to 30.

3. Reasonable close planting: sowing density of precocious garlic in winter and spring is 110000 plants / mu, sowing rate per mu is 200kg-230kg, sowing density of Y garlic and Shandong white garlic is 90000 plants / mu, sowing rate per mu is 170-200kg.

4. Scientific fertilization: controlled nitrogen fertilization; balanced fertilization; reasonable application of organic fertilizer, heavy application of base fertilizer, light application of topdressing; actively promote the safe interval of nitrogen application. Garlic needs more fertilizer, generally, the amount of base fertilizer per mu is stable fertilizer 2000kg, nitrogen fertilizer 15kg, phosphate fertilizer 25-35kg, potassium fertilizer 15kg; nitrogen fertilizer 20kg per mu at seedling stage, nitrogen fertilizer 15kg and potassium fertilizer 10kg at expansion stage. At the same time, 100 g / mu of garlic Zhuangguoling was sprayed.

5. the prevention and control of garlic diseases mainly popularize seed dressing and strictly control seed-borne and soil-borne diseases. Chemical seed dressing is a conventional basic measure to control seed-borne and soil-borne diseases and prevent the prevalence of diseases. it is economical and efficient and should be popularized. Garlic white rot can be mixed with carbendazim and methyl thiophanate with 0.5% of garlic seed weight. In garlic field, 100 g / mu of diuron was used to control weeds at 2Mel 2.5 leaf stage. Avermectins and other insecticides are still the first choice for the control of Liriomyza huidobrensis, onion scale moth and thrips, and the popularization and application of frequency vibrating insecticidal lamps should be strengthened. In the prevention and control of garlic leaf blight, mancozeb agents were mainly used before the 7-Mel 8-leaf stage, and Shigao, ginger, onion, garlic disease clear and Ke Fengshuang should be selected when entering the extension period of garlic moss. At the same time, attention should be paid to the safe interval.