"Autumn cabbage is the main variety to alleviate the lack of autumn vegetables. After planting is completed, growers must not relax management." On August 29, Li Linxiu, senior agronomist and vegetable cultivation expert from Nanjiang County Agriculture and Rural Bureau, visited Sophora Tree in Jizhou Street Tianbahe Vegetable Planting Cooperative in Ping Community, on-site explained field management techniques. Lao Li said that the key to autumn cabbage management is to grasp the following technical steps- First of all, for the live-broadcast autumn cabbage, it is necessary to have time to seedlings after the seedlings, so as to prevent the seedlings from being crowded and growing. Thinning should be carried out three times at the time of one leaf and one heart, 2 to 3 middle leaves, and 5 to 6 middle leaves. When the seedlings grow to 20 days-26 days later, when they reach the stage of group trees, the seedlings should be fixed according to the predetermined spacing. The plant spacing depends on the variety and water and fertilizer conditions. Generally, the plant spacing of medium-sized varieties is about 50 cm, and that of large varieties is about 60 cm. Seedlings should be refilled in time if they are found to be missing. Replenishing seedlings*** Take advantage of the opportunity of watering or rain to take the excess seedlings to replant. It is necessary to combine the thinning to carry out cultivating 3 times, respectively after the second thinning and the middle stage of the rosette. Cultivation is carried out in accordance with the principle of "the first hoe is shallow, the second hoe is deep, and the third hoe does not damage the root". Van Gogh ridge cultivation must follow the principle of "deep furrow and shallow furrow", combined with intertillage for weeding and soil cultivation. Soil cultivation is to cultivate the sloping furrow soil on the side and surface of the ridge, so as to protect the root system and make the ditch road unblocked for easy drainage and irrigation. Fertilizer and water management is the key to achieving high yields of cabbage, which should be grasped in stages according to the conditions of the seedling stage, rosette stage, and heading stage. Seedling stage: After the seedlings are fixed or just transplanted, the root system of the seedlings is not developed and the ability to absorb water and fertilizer is weak. Although the amount of fertilizer and water is small, it is in the high temperature season. In order to ensure the survival rate of the seedlings, it is necessary to maintain the moisture of the planting soil According to climate change, especially in sunny conditions, water should be watered every three or four days. At the same time, due to the shallow root distribution in the seedling stage of cabbage, the effect of basal fertilizer is slow, and the young roots cannot be used in time, the seedlings should be extracted with clean manure water every 7 days or so. The lotus stage: the lotus stage is the period when autumn cabbage roots occur in large numbers and the leaf growth increases sharply. It is also the basic period for the formation of large leaf bulbs. This stage requires more fertilizer and water, so it is necessary to pay great attention to the management of this stage. The water management should be such that the soil "sees dry and sees wet", generally in the middle of the rosette period, it is necessary to water a large amount of water, then deep cultivate it once, and then control the water to squat the seedlings for 10-15 days. Heading stage: The heading stage of cabbage grows vigorously and requires sufficient fertilizer and water supply. Generally, it needs to be irrigated 2 to 3 times. In dry weather, the number of irrigations should be increased. Irrigation should be done first and lightly to prevent sudden flooding of the cabbage ball from cracking; the second time should be followed closely to prevent the ground from cracking and causing root breakage. Irrigation should be done so that there is no accumulation of water in the furrow, no water on the ridge surface, and no shortage of water for root absorption. Stop irrigation 5-10 days before harvest to ensure the storage of cabbage is improved. The main pests and diseases of autumn cabbage and their control methods—— ①Virus diseases: select disease-resistant varieties; adjust vegetable layout, rationally rotate crops, and remove diseased plants in time; sowing early in the right season to avoid high temperature and aphids rampant seasons; control and control aphids at the seedling stage; spray virus No. 1 emulsion 500 at the early stage of onset Prevention and treatment of 1000 times liquid or virus No. 2 emulsion. ②Soft rot: It usually occurs from the rosette stage to the pericardial stage. Control measures: try to plant cabbage in the fields of wheat, rice, and leguminous crops before cropping, and avoid continuous cropping with Solanaceae, melons and other cruciferous vegetables; plow the ground as soon as possible to promote the decomposition of diseased bodies; Planting in the ditch and high compartments, selecting disease-resistant varieties, sowing in an appropriate period, and treating the seeds with medicaments. Use the following medicaments for prevention and control before or at the beginning of the disease: spray with 25% synergistic agricultural streptomycin soluble powder 2000-3000 times liquid or Irrigate the roots, or spray with 72% agricultural streptomycin soluble powder 2000 times-3000 times liquid, or 50% sterilized into or spray with 100 times-1500 times liquid of sterilization. ③Black spot disease: select disease-resistant varieties, sterilize seeds, eliminate diseased plant residues and weeds, apply sufficient basal fertilizer, increase phosphorus and potassium fertilizers, and improve vegetable disease resistance. If the diseased plant is found, it should be pulled out and buried or burned in time, or sprayed with 75% chlorothalonil, or 58% metalaxyl manganese zinc, or 10% difenoconazole 900-1300 times solution, or 43% tebuconazole Suspending agent 2000 times -2500 times liquid. ④Aphids: Use armyworm yellow boards to catch and kill aphids. The armyworm yellow board is placed next to the farmland to trap and kill a certain number of winged aphids. In addition, silver gray has a strong repellency to aphids. Silver gray plastic strips or silver gray mulch can be hung in the vegetable garden to avoid aphids. Also, through introduction and reproduction measures, aphids’ natural enemies like ladybirds, hoverflies, Aphid cocoons, aphids, etc. control aphids and control their damage. ⑤ Pieris rapae: The main natural enemies of Pieris rapae are Trichogramma vulgaris, Papilio rapae, etc., which can be put in the field during the growth period of cabbage. Through the method of pest control, the number of Pieris rapae in the field can be effectively prevented and the number of pests to Chinese cabbage can be reduced. The harm. Disclaimer: Some articles on this website are transferred from the Internet. 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