Celery planting: how to grow celery in summer?

How to grow celery in summer? Please give a detailed description of the method of sowing summer celery in early May, planting in early and mid-June, and harvesting in early August. The growth of celery in summer is in a period of high temperature, and the damage of diseases and insect pests is becoming more and more serious, which is prone to premature senescence, resulting in the formation of rolled leaves and shrinking leaves, and poor commercial characters, which seriously affect the time to market and the appearance quality of celery. Planting celery in summer can refer to the following methods: select suitable varieties: the requirements of summer cultivation are high temperature resistance, fast growth, less fiber, high yield and so on. At present, the varieties that can meet the requirements are Italian celery, Xintai celery and green and white stem celery. Sowing and raising seedlings at the right time: generally sowing in the first ten days of May, the listing period is just in the "autumn light" season. Before sowing, dry the seeds and remove sundries, then soak the sundried seeds for 12-24 hours, after washing, take out and wrap them in a shady place or put them in the refrigerator to accelerate germination, after two days and nights, take out and dry and sow a small amount of cabbage seeds into the seedbed, cover the grass curtain or sunshade net with feet gently, and use 1.5kg / mu of seeds, which can be used for seedlings of 2000-2500 square meters. After emergence, remove the grass curtain or sunshade net, and carry out inter-seedling, between disease and insect seedlings, miscellaneous seedlings. The seedlings are fixed when they grow to 15 centimeters. Planting and field management 1. Suitable age colonization: when the seedling age reaches 30-40 days and the seedling height is 17-20 cm. The row spacing of the planted plant is 10 cm × 10 cm. The fixed root water should be fully watered when planting, and the living tree should be watered again the next day. 2. Timely fertilizer supply: 40-50 days after the seedling is alive, the new root occurs. Generally apply fertilizer twice, 15-18 kg each for the first time and 14-15 kg for the second time. In the middle and later stage, the root group has occurred in large numbers, and the ground petiole has grown to high, thick and full growth. At this time, if the plant is weak and the leaf color changes from green to yellow, ammonium nitrate can be sprayed and 4-5 kg per mu can be applied to water. Boron should be applied if the soil is boron deficient. 3. Timely and humid water supply: make sure that the water is irrigated frequently and not flooded. The field soil remains moist all the time. Especially in the middle and later stage of celery growth, the water should not be cut off, otherwise there will be petiole aging and bran heart. Irrigation to irrigate more than half of the ditch water, the border surface is wet after drainage, avoid flood irrigation, so as to avoid the spread of diseases. In case of cloudy and rainy weather, clear the box trench so that the rain stops the field to dry. 4. Prevention and control of diseases and insect pests: the main diseases and pests are red spiders, aphids, virus diseases and so on. 1000 times of dicofol can be used to control red spiders, 800-1000 times of dimethoate can be used to control aphids, and 500 times of 20% virus A500 times can be used to control virus diseases. 5. Standard harvest: summer celery is generally on the market from August to September, when the "autumn light" market is good, and the celery plant height is close to the "standard" harvest, so as to get good benefits with "early". The market is harvested smoothly according to the "standard", in order to obtain high income with high yield. The standard is: celery is about 90 centimeters high. Click to get more celery planting techniques click to get more vegetable planting techniques