I. Occurrence of Weeds in Peanut Field According to the survey, there are 26 crops and 70 species of weeds in peanut fields. Grassy weeds account for more than 25%, and Compositae weeds account for about 15%. In addition, there are also families such as Polygonaceae, Polygonaceae, Polygonaceae and Solanaceae. The density of fields such as crabgrass, sedge, iron leeks, purslane, goosegrass, teff, leeks, and burdock was the highest, and the frequency of crabgrass appearance was 95.3%. It was the main weed in peanut fields. The distribution of various weeds differs markedly: (1) The distribution density of coastal crabgrass such as crabgrass, goosegrass, amaranth, sedge, etc. is greater than that in inland areas, especially in sedge, and the average density is within Land is 2 times. (2) Flatland is more densely distributed than hilly land, and several major weeds are in the area density of flatland and hilly land, with crabgrass 1.55:1, purslane 2:1, and cattle grass 5.1:1. The grass is 25.8:1. (3) The density of weeds grown in summer is greater than that of spring sowing field, which is 5.2:1. (4) Different front rakes, the distribution of weeds is not the same, such as the former rake is more corn than the larvae of weeds. (5) Different planting patterns also have an impact on the distribution of weeds, such as more flat grasses than weeds. II. Control of Weeds in Peanut Fields 1. The main measures for the use of agronomic measures to prevent and control are: (1) The spring cultivated land is changed to winter cultivated land. Winter ploughing is 24.5% less than weeding weeds. (2) Deep plowing. (3) The rotation is changed. In particular, it is best to use weeds and dry crops for weeding. (4) Field cover grass. This is especially suitable for the cultivation of peanuts in plastic film, which can not only keep warm and moisturize, but also increase soil organic matter. The control effect is 87.2%. (5) The flattened species is ridge species. 2. Choose acetochlor to control the herbicides with the best effect. The control effect is 100%, and the control effect on broadleaf weeds is also ideal. In the post-emergence herbicides, the best control effect was Gaizhiling, with an efficacy of 90.6%, and it can be killed from the trifoliate stage till the maturity of the grass weeds. Followed by grass grams and broadleaf leaves. Herbicides vary from place to place. (1) According to the nature of the herbicide, determine the appropriate period of application, such as acetochlor injection on the same day after sowing peanuts 7 days after sowing herbicidal effect increased by 12.7%, the application of the appropriate period for peanuts within 3 days after sowing, post-emergence weeding The agent had the best effect at the weed 3 to 5 leaf stage. (2) Determine the size of the drug according to the cultivation method and soil temperature and humidity. Covered cultivation of peanuts is less than that of uncovered plants. In the case of sensational adaptation, covering 100 ml of acetochlor with a film can achieve a 100% effect. In normal years, the amount of acetochlor is preferably 60 to 90 milliliters for peanuts, and 40 to 60 milliliters for peanuts. The amount of acetochlor should be appropriately increased during the low-temperature and rainy season. (3) Determine the amount of water according to the climate. Within a certain range, the weeding effect increases as the amount of water is increased. When the soil is dry, the mu water is suitable for 60-75 kilograms, when the humidity is suitable, the water can be 35-45 kilograms. (4) Herbicides are mixed and used interchangeably to prevent weeds from developing resistance and prevent potential weeds from becoming major weeds. In short, during the control of weeds in peanut fields, herbicides should be properly selected according to the actual situation, and appropriate measures should be taken due to grassland in order to achieve the purpose of increasing production, increasing income, and increasing efficiency.
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