With the development of science and technology, many farmers who have planted vegetables have chosen greenhouse greenhouses to grow vegetables. Greenhouses are an easy-to-protect crop infrastructure in facility agriculture. They can make full use of solar energy and have a certain thermal insulation effect. Through the film roll, the temperature and humidity in the shed can be adjusted within a certain range, and the heat preservation cultivation effect of spring advance and autumn delay can be achieved. Cultivating vegetables in the greenhouse, the facilities have good sealing performance, and pests and diseases are not easy to spread. As long as the technical measures are proper, the pests and diseases should be significantly lighter than the open field cultivation, and even the pests and diseases can be avoided. So why are pests and diseases getting worse? The main reasons for the growing pests and diseases of cultivated vegetables in greenhouses are: First, improper temperature and humidity management, fungal and bacterial diseases are suitable for the onset of temperature between 15~26 °C, air humidity needs to reach about 90%. Most vegetable growers start to ventilate around 10 am, close the tuyere in the morning and at night, resulting in low indoor temperatures and high air humidity. Causes the disease to occur. Tomatoes, peppers, etc., many vegetable farmers began to ventilate at 27 ° C, cucumber, melon, watermelon and so on at 30 ° C ventilation. In such a way of ventilation, the indoor temperature is just around 20 °C, which causes gray mold, downy mildew, powdery mildew, various diseases, and various bacterial diseases, so the disease is inevitable. Second, the low temperature causes the soil temperature to be low, so that the soil temperature is at around 20 °C for a long time or even lower. The low soil temperature affects the root development of vegetables, and the root development and absorption capacity are deteriorated. Vegetable plants are resistant to stress and disease resistance is poor, which is prone to disease. Third, a large number of vegetable farmers do not care about the control of pests and diseases. In many greenhouses, there are a large number of residues of vegetables such as pests, diseases, insects, and vines. These diseases contain a large number of germs and pests. If they are not destroyed in time, the pests and diseases will be released continuously in the greenhouse or around the greenhouse, and the farmers will carry the bacteria into the room, causing diseases and harming crops. The bearing structure, fixed film systems and installation of this greenhouse is relatively simple. And due to it, raw material and manufacturing costs are affordable. Except the high strength woven film is higher, other kinds of antidrop film are economical. In general, the comprehensive cost of film greenhouse is lower 30% ~ 50% than the same size and specifications of the other types of greenhouse. Single Span Greenhouse,Greenhouse Film,Tunnel Greenhouse,Plastic Film Greenhouse JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com
