Rice is the main food crop in our city. Weeding in rice fields has always been a very important task. There are three guiding suggestions on how to properly use chemical herbicides. Use phytotoxic herbicides with caution. The herbicides such as glyphosate, Roundup, paraquat, etc., are sprayed on the stems and leaves of plants, and are transported to various parts of the plant through absorption and transmission by the plants, causing plant poisoning to die. They are not selective to plants, and Grass and crops all have a killing effect. Therefore, paddy fields generally do not use phytotoxic herbicides, but they must be used before sowing or 5 to 7 days before transplanting to prevent vicious weeds from being used. They must not be used during and after sowing and transplanting. Use after transplanting to avoid phytotoxicity. Correct use of herbicides. For different control subjects, herbicides corresponding to herbicide spectrum were selected. Films are covered with flat tiles and covered with film arches to cover the fields. At the time of sowing, butachlor, alfalfa, pretilachlor and dipropion are used to spray water on the soil surface and cover the membrane; seedling (2.5 leaf) treatment Can be used for alfalfa grass, alfalfa weed, weed pine, quincloracic acid, ethoxysulfuron, flu photosulfuron, penoxsulam, fluoxyl, etc. According to the standard amount of water spray or mix Dirt soil. Exposed wet earthworm fields can be treated before sowing can use grass alfalfa, butachlor, pimecadan, Shapu Long, etc. According to the required standard amount, after the whole field is good, spraying method to the soil surface, interval 2 to 3 days and then sowing After seeding, the pre-planting treatment can be used to pre-select the medicine according to the prescribed amount of water evenly sprayed; seedling (2.5 leaf) can be used to cover the drug selection spray or blending fine soil with toxic soil. Rice transplanting fields are generally treated with weeds after transplanting: in the early stage after transplanting (4 to 7 days after planting), butachlor, chlorfenapyr, valerian, diterpenoid, dipropion, ethoxy The standard amount of sulfone and the like is administered by the method of pharmaceutics; in the middle and late period of transplanting (from the peak to the end of the tillering period), quinacryline, valerizapine, prometryn, liguron, 2,4D butyl ester are available. , 2 tetrachloro sodium, fluoxyloacetic acid, penoxsulam, etc. According to the standard amount of the application of medicine soil method. The pre-emergence treatment and the post-planting treatment of direct-seeded rice were the same as the seedling treatment at the time of seedling sowing in the open field and wet seedling fields. The post-emergence treatment in the middle and later stages was the same as the transplanting field. Strictly follow the procedures. Strictly control the amount of medication, according to the provisions of the dispensing, timely application of the drug, uniform application of drugs to ensure the control effect. Also pay attention to the use of special herbicide herbicides, sprayers applied herbicide is best not to spray pesticides and plant growth regulators to avoid phytotoxicity.
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