Nowadays, autumn vegetables have already entered the peak of planting. However, many vegetable farmers in the near future have reflected the low yield and poor efficiency of open-land vegetables planted last year. According to the survey, the main reasons for the low yield and poor efficiency of open field vegetables are that the appropriate cultivation method is not determined according to the vegetable species; second, the prevention of pests and diseases and the control of weeds in the field during the seedling stage are not paid attention. Choose a suitable cultivation method When planting open land vegetables, some vegetable growers adopt a cultivation method regardless of the seedlings and vegetables. The cultivation methods are not determined according to the characteristics of the vegetable varieties. This can easily lead to a decline in the yield and quality of the exposed vegetables, and the benefits are reduced. There are two main methods for the cultivation of open-air vegetables: one is flat ridges and the other is ridges. Vegetables, such as cabbage, Chinese cabbage, radish, cauliflower, lettuce, etc., which occupy a relatively large area and have a relatively small number of trees per acre, should be ridged and colonized. But pay attention to different vegetables, ridge height is also different, Chinese cabbage ridge height generally requires about 15 cm, while cabbage is about 10 cm, lettuce is about 8 cm. After such planting, it will not only be beneficial to the growth of vegetable roots, but will not root because of watering or excessive rainfall, but also conducive to the ventilation of the stem base and facilitate the prevention of diseases. Pay attention to the prevention of plant diseases and insect pests at seedling stage At present, there are still more high-temperature and more rainy weather. High-temperature and high-humidity environment is very conducive to the occurrence of diseases and insect pests. During this period, we should strengthen the prevention and control of pests and diseases. The diseases that often occur at this stage mainly include the damping-off disease and soft rot during the seedling period. Phytoesitis is a disease caused by fungi, often resulting in a large area of ​​dead trees. It is recommended that vegetable farmers timely spray after emergence and before rainy days. 75% chlorothalonil 600 times solution and 500% solution of methoprosum manganese zinc can be used. And other agents spray. Soft rot is a kind of bacterial disease. After the illness, the diseased seedlings are rotted and smelly. When the humidity is high, the disease is heavy and spreads quickly. Therefore, the prevention must be done in the early stage. After the planting of vegetables, it is necessary to watch and listen to the weather forecast in time. If it is forecast to have rainy weather, it should be sprayed with protective agent in time before the rain, observe the seedlings after the rain, and find the disease in time with the use of 72% agricultural streptomycin 3000 times, 3 % Zhongshengmycin 1000 times, 33.5% quinoline copper 800 times and other agents spray control. After heavy rain, fungicides such as chlorothalonil and carbendazim should be sprayed in time to prevent the occurrence of diseases. Take measures to prevent weeds After soil preparation, pre-emergence herbicides such as Shi Tianbu and trifluralin may be sprayed before planting vegetables. Specific operation: 33% Shi Tian fills 100-150 ml per acre, evenly sprays the soil surface; 48% trifluralin works best when mixed with soil, and it can be strongly adsorbed by clay colloid and soil organic matter in the soil. , So it is not easy to lose, can use 150-200 milliliters per mu watered 45 kg spray treatment of the soil, then mixed soil 2-3 cm deep, 7 days after planting vegetables. In order to ensure the application effect of the herbicide, it is better to level the surface of the sorghum before application to make the soil finely divided. For fields that have not been sprayed with herbicides, vegetable growers are advised to plan to remove the weeds in time to reduce nutrient consumption and promote vegetable growth. For the weeds that grow on the ridges or between the seedlings, it is best to take the method of manual removal so as not to hurt the seedlings and provide opportunities for the infection of pathogens. Safety Vest,Reflecting Safety Vests,Lighted Safety Vest,High Visibility Safety Jackets Ningbo Zhihao Car Accessories Co.,Ltd. , https://www.zhihaoautoparts.com