Excessive summer management points for open tomatoes

First, choose disease-resistant heat-resistant varieties According to local conditions, select disease-resistant, heat-resistant, storage-resistant, high-yield, high-quality varieties. Second, before the implementation of crop rotation selection, we have not planted oyster plots of solanaceous vegetables. It is advisable to rotate crops with field crops and cultivate them in disease-free areas. This is a simple and effective measure to achieve high yields and stable yields in tomato cultivation in the summer. Fields generally have poor fertility. Before planting, deep plowing should be carried out to increase the base fertilizer. Generally, 3000-5000 kg of farmyard manure, 100 kg of superphosphate, and 30 kg of compound fertilizer are used per mu. Third, the cultivation of mulching mulching film tomato cultivation in summer should generally use high ridge or mulching mulching. The pods are generally made of 20-25 cm tall sorghum and then covered with plastic film. The high mulching film coverage is not only beneficial to maintain water and fertilizer, but also conducive to drainage in the rainy season and prevent disease and prevent decay. Fourth, nurturing strong seedlings, appropriate sparsely cultivated tomatoes are generally planted during the summer and July 7-9. The cultivation density of tomato should not be too large during summer, and the density of the tomato is too bad for ventilation and light transmission, and the field is closed. The high-temperature rainy season is prone to various diseases and premature plant failure. Generally, the width is 1.6 meters (90 centimeters wide and 70 centimeters wide). Two rows, 50 centimeters spacing, 45 centimeters spacing, only 1900 plants per acre. Local conditions can be combined. Suitable for sparse planting. There are no more than 3,000 acres and it is important to plant strong seedlings when planting. Fifth, rational pruning, multi-layered fruit tomatoes more summer cultivation should be implemented in large-scale cultivation, multiple layers of fruit. Pruning can be done with single or double dry pruning. On the basis of the production of spring tomato, it can also adopt the continuous replacement head regeneration and pruning method to carry out the over-summer cultivation and production. Single or double dry pruning, or continuous regeneration of pruning, generally have to focus on the top 50 days before the frost topping. To prevent the fruit from ripening. Toppings generally have to leave two functional leaves. Topping should not be too early. Premature premature failure is easily caused. Tomato cultivation over the summer results in 5-10 spikes and 20-30 fruits per plant. Sixth, to strengthen the field management Tomato cultivation over the summer through the application of base fertilizer, appropriate seedlings. To promote deep rooted leaves and high temperature before the arrival of the rainy season, we must pay attention to adjust the balance between good nutrition and reproductive growth, appropriate thinning and fruit thinning, to avoid falling, to maintain vigorous growth of plants. To remove the old leaves and diseased leaves of the plant in time. It is necessary to strengthen the prevention and control of diseases such as late blight, virus disease and spot disease; and timely control of insect pests such as aphids and cotton bollworms. When the temperature is high and it is rainy, the tomato is easy to fall, 25-30ppm of tomato canopy flower or spray can be used to preserve the fruit; as little as possible or without 2,4-D, reduce the number of deformed fruit. VII. Harvesting of tomatoes in time The cultivation of tomatoes in summer is generally harvested from mid-July. To avoid rotting and cracking fruit, it should be harvested immediately when the fruit begins to turn red.