Peanut weeds have long-lasting and difficult-to-control characteristics. Weed control has always been a headache for farmers' friends. Understanding the damage of weeds to peanuts, mastering control techniques, and correctly selecting herbicides can improve the weed control effect and increase the yield and income of peanuts.
1. Agronomic measures. (1) Apply organic fertilizer such as decomposed rim fertilizer. Pay attention to fully control the maturity and reduce the number of weed seeds that can germinate; (2) Change the spring farmland to winter cultivated land. Winter tillage can reduce weeds by 24.5% compared with spring tillage; (3) Deep tillage. Reduce the germination rate of weed seeds in surface soil; (4) Rotate the crops. Change the weeds' ecological environment and weed communities, and the effect of rotation between paddy and dry land is better. (5) Cover grass in the field. Straw mulching can not only maintain moisture, but also increase soil organic matter, no pollution, no residue, and good anti-grass effect; (6) Change flat sowing to pod or ridge species; (7) Weeding the plastic film. One is to use a herbicide film and the other is to use a colored film. Note that both membranes need to be in close contact with the ground. Do not use force to tighten the membrane. The use of weeding membranes eliminates the need for spraying herbicides, saves labor, has a good weed control effect, and has a long weeding period.
2. Chemical weeding. (1) Soil treatment before planting. The herbicide is sprayed on the surface of the soil, and the herbicide is mixed into the soil through the operation of mixing soil to establish a closed layer of herbicide so as to absorb the weed grass roots and young shoots and kill the germinating weeds. Use 100-150 ml of tetraflualine oil per acre, 50-60 kg of water (5-7 days after sowing), or 70% of chlordiazepoxide, 180-250 ml of emulsifiable concentrate or 88.5% of EC 150-200 ml, 50-60 kg of water (sowing after application), or 48% of trifluralin 60-80 ml + 70% of Diterpenem 100-120 ml, or 90% of Irendal (Dual Benzene) Acetochlor) Wettable powder 300-400 ml. Spray the ground evenly and make it shallow, and mix the herbicide in 3-5 cm soil layers. It is also possible to use 50% paracetamol WP 100 ml or 80% paracetamol WP 50-70 g per mu, 50-60 kg of water, evenly sprayed on the surface, and then sowed. Trifluralin and other herbicides will inhibit the growth of peanuts to a certain extent. When applying them, it is necessary to pay attention to isolation of the pesticides so as to avoid phytotoxicity.
(2) Pre-emergence soil treatment after sowing. This is the best time to use chemical herbicides. The herbicide is sprayed on the surface of the soil to form a drug layer, and the contact layer is killed after the weeds have germinated. All peanuts are covered with a soil treatment agent. When the peanuts are sown, they are sprayed with herbicide and immediately coated. Not covered with peanuts, peanuts have not yet been exhumed, and weeds can be treated before sprouting. It is recommended to use amide herbicides such as Jindal, Dole, and cable. Before the seedlings are sown in peanuts, 50-60 ml of Jindu is used in the mu and the spray is evenly sprayed on 30-40 kg of water. It can prevent many kinds of annual weeds, and the effective period in the field is 50-60 days. Saline-alkali land, aeolian sandy land, organic matter content less than 2% sandy loam soil, particularly arid soil or leeches, it is best not to use soil treatment, post-emergence stem and leaf treatment agent should be used.
(3) Post-emergence stem and leaf treatment. 1 Peanut field dominated by grasses. The effective post-emergence herbicide can be used to effectively cover grass. In the peanut 2-4 leaf stage, the grass weeds 2-5 leaf stage, the mu 10.8% high efficient gaiseng can EC 20-30 ml, and the water 40 kg Sprayed on the stems and leaves of plants, it has better control effect against Setaria viridis, tendon grass, and crabgrass, and has no phytotoxicity. Mu can be used with perennial Geranium weeds such as Spike-root and Imperata. 2 Peanut fields dominated by broad-leaved weeds. The use of diphenhydryl herbicides such as Huwei (fenflufenicin), Kekuile ​​(milfloxacin) and Bendason may be used. Mu 24% Kekuile ​​EC 25-40 milliliters, 40 kilograms of water, before the height of broadleaf weeds plant 5 cm tall, stem and leaf spray, a variety of broad-leaved weeds have a good control effect. Mu using 48% Bentasone liquid 130-200 ml, 40 kg water, spraying in the weed 3-5 leaf stage, special effects on a variety of broad-leaved weeds and Cyperaceae weeds, but for the miscellaneous Invalid grass. 3 Peanut field mixed with grass weeds and broad-leaved weeds. The combination of the above two types of herbicides can be used to control both monocotyledonous and dicotyledonous weeds. Mu with 10.8% of high-efficiency canopy emulsifiable concentrate 20-25 ml plus 45% Bentasone liquid 100-150 ml, or plus 24% Ke Quole EC 10-20 ml, spraying at weed 2-4 leaf stage, can Effective control of many annual single and dicotyledonous weeds. Stem and leaf treatments are mainly sprayed. The period of application should be controlled during the period when the peanuts are safe and sensitive to weeds. That is to say, the weeds should be basically in the same level, the weeds in the 2-4 leaf stage, and the broadleaf weeds. It takes place at a height of 5-10 cm.
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