In vegetable production, cultivating and weeding often account for more than 40% of the total management of the entire field. If chemical weeding is used, not only can we effectively control weeds, improve the quality and yield of vegetables, but we can also save a lot of weeding labor and reduce labor intensity, but we must do the following “eight items of attentionâ€. One should try to use drugs before seedlings. For chemical weeding in vegetable fields, soil treatment is often used, but it must be applied before or after sowing. The application time should be a good weeding effect at the initial stage of weeds so as to avoid or reduce the pollution and residue of pesticides on vegetables. Second, we must make the soil flat and moist. In the treatment of soil with herbicides, the soil requires that the soil surface be smooth, finely crushed and moist. This will not only ensure the uniform application of pesticides, but also create favorable conditions for the weeds to germinate, so that the weeds will germinate in a consistent manner, thus achieving a single use of drugs to kill most of the time. The purpose of weeds is to increase the weeding effect. Third, timely medication. General chemical herbicides have a good effect in the weeding period. However, when the weeds grow to 9-10 cm or after giving birth, the effect is poor or even ineffective. Therefore, control of weeds should be carried out during the germination stage of weeds. Fourth, spray evenly. Poorly wettable chemical herbicides are prone to precipitation. Therefore, when spraying, shake it frequently to ensure even spraying, otherwise the concentration of the lower layer of the liquid is too high, which can easily cause injury. Fifth, it is necessary to reduce medication in the facility cultivation area. Facilities such as protected areas are cultivated with high soil temperature, high humidity, and fast and high efficacy. Therefore, the dosage should be reduced by 20%-30% in the exposed vegetable fields so as to avoid causing phytotoxicity to vegetables. Six to alternate medication. Note that it is not possible to use a single herbicide for a long period of time in order to prevent weeds from developing resistance and improve weed control. Seventh, we must cover the soil in time. Some chemical herbicides such as trifluralin are volatile and should be coated with soil immediately after application to ensure efficacy. Some herbicides are easily dispersible and cannot be exposed to sunlight. So, immediately cover the soil after using the medicine. Eighth, we must use a herbicide with a short potency. According to the variety of vegetables and the length of the growing season, it is generally better to use herbicides with a suitable duration to reduce the time of residual contamination and ensure safety. Two-Piece Colostomy Bag,Internal Colostomy Bag,Colon Cancer Colostomy Bag,Bowel Removal Colostomy Bag Wenzhou Celecare Medical Instruments Co.,Ltd , https://www.celecaremed.com