What kind of herbicide is used in the open coriander field?

What kind of herbicide is used in the open coriander field? Should it be used before or after the seedling? Also ask the netizens who know to help introduce the common weeds in the coriander field, such as purslane, beef rib grass, etc., these weeds are generally mixed in the coriander manual removal trouble, repeated growth is fast, so the farming network sorted out the methods of using herbicides to control weeds in the coriander field, which are listed in detail below for netizens' reference. Method 1. Use pre-bud herbicides: Shitianbu, fluralin and so on can be used. Apply field fill with 33%, 100-150 ml per mu, and spray the soil surface after sowing. 48% trifluralin, the best weed control effect is mixed into the soil, which can be strongly absorbed by clay colloid and soil organic matter in the soil, so it is not easy to leach. After spraying the soil with 150-200 ml per mu and 45 kg of water, immediately mix the soil with a rake and sow 5-7 days later. Method 2. Weeding methods after weeds grow out: choose herbicides such as Mianshade or Weiba. In the weed 2-3 leaf stage, the weeds were sprayed on stems and leaves with 15% EC 30-80 ml per mu, or 6.9% Weiba emulsion 50-60 ml and 45 kg water. Precautions for the use of herbicides in coriander land: first, the herbicides used to deal with the soil, it is best to tidy up the soil border before use to ensure that the soil is fine and broken, so that the effect is good. Note 2, such as the use of herbicides in stems and leaves, it is best to choose sunny and windless weather spraying, to avoid blowing to other crops with the wind, endangering other crops. When growing parsley, we need to pay attention to what to do and how to make it sprout quickly.