Which herbicides should be used in heat preservation cultivation of vegetables

In the season of low temperature, in order to make vegetables on the market earlier and sell at a good price, in recent years, plastic film mulching is often used to increase temperature and heat preservation to promote early ripening and yield increase of vegetables. At the same time, herbicides are used to save labor and increase efficiency. However, the experience and lessons of chemical weeding in the film for many years tell us that if the herbicide is not selected properly, or if the application method is wrong, the weeds will not be eradicated, the second will cause drug damage to vegetables, and the third will pollute the environment. Fourth, it will reduce the market value of vegetables. In order to give full play to the effect of herbicides, the herbicides suitable for eggplant fruits, legumes and leafy vegetables are introduced as follows: eggplant vegetables such as tomatoes, eggplants, peppers and so on. The available herbicides are: 72% Dur EC 100-150 ml per mu or 48% Durolamine EC 150-300 ml per mu, covering plastic film with 30 kg water respectively after sowing. 33% herbicide EC 150-300 ml per mu or 24% Guoer EC 50-100 ml per mu or 50% Saikejin wettable powder 50 g per mu, mixed with water 40-50 kg respectively, and covered with plastic film after sowing before emergence. For legume vegetables such as peas, edamame beans, cowpeas, etc., the available herbicides are: 48% trifluralin EC 100-150 ml per mu, 40-50 kg water; 50% azinone wettable powder 23-45 grams per mu, 40-50 kg water, mixed with soil before sowing after soil preparation, and then sowing with plastic film 33% herbicide EC 150-200 ml per mu, 50% Acetochlor EC 70-150 ml per mu, 40-50 kg water, or 50% Ximazin wettable powder 33-100 g per mu, 40-50 kg water, film mulching before seedling emergence after sowing. Cruciferous vegetables such as Chinese cabbage, red cabbage, cabbage, cauliflower, etc., the available herbicides are: 33% herbicide 100-150 ml per mu, 48% Rasol EC 150-200 ml per mu, 50% herbicide 100-150 ml per mu, 50% Huili wettable powder 100-200 grams per mu, 40-50 kg water respectively, sprayed on the surface before plastic mulching. Several points should be paid attention to in the application of herbicides in the film: first, the amount of water per mu should not be too low, and only by ensuring humidity can the development and permeability of herbicides be enhanced; second, the herbicide should not be sprayed repeatedly and should be put in place at one time to avoid drug damage caused by increasing concentration; third, trifluralin and azinone are highly volatile, and be sure to mix well with the soil with tooth rakes to a depth of 2-3 cm after application. Fourth, the film must be strict, neither the leakage of medicine, nor the leakage of the film, it is found that the broken film should be covered in time.