In the past 10 years, China's chemical herbicides have developed rapidly. The currently used chemical herbicides are mainly phytotoxic and selective chemical herbicides, while herbicides for dry fields mainly use selective herbicides, and selective herbicides are also used to block pre-emergent herbicides and post-emergent herbicides for stem and leaf treatment. There are many kinds of herbicides and the application technology is high. Therefore, the choice of the herbicide type for the road and the good use of the technology are the key to the promotion of herbicide application in agricultural production. Wheat weeds in the field of chemical weeding occur in many types and are widespread, have a long growth period and cause serious damage. Since the species of weeds varies from region to region, weedicides have different sensitivities to different weed species. Therefore, we must identify the occurrence of the main weed species in the local area of ​​the region and select herbicides for the road. Achieve the ideal weeding effect. In general wheat fields are dominated by wheatweed, leeks, porcine clams, sow wormwood, nymphalina, laverna, bryophyte, and mwa pots. It is recommended to use 75% of superstar dry suspension agent per gram of acre, or 40% of fast-killing Linggan County flotation agent of 2 grams per mu, or 10% of Mela dry suspension agent of 10 grams per mu, or 72% of 2,4-D butadiene. Emulsifiable concentrate 50 ml per acre, or 48% herbicide admixture 16 ml per mu, or 20% dimethyl tetrachlorohydrin spray 150 kg per mu water 40 kg. In areas such as Luzhong, Lunan, Jiangsu, Henan, etc., the occurrence of serious weeds in the fields of Zeze paint (porcine eye), swine fever, wheatgrass, field bindweed, alfalfa and clams is relatively serious. 50% of usable water-soluble powder can be used. Granules per gram of 3 grams or 40% of the fast-killing dry suspension agent 4 grams per acre, or 20% to make it long-emulsion 50-60 ml per mu water spray 40 kg. Some rice, wheat, and wheat fields on the banks of Jiangsu, Lunan, and Yellow Rivers have serious grassy weeds such as wild oats, barnyardgrass, acorns, foxtail, and hardgrass. It is possible to use 6.9% of the Fahima EC 50-60 ml of water per mu. Kilogram spray. For grass weeds and broad-leaved weeds mixed areas, the weeds are of equal quality and merit. It is recommended to use 5.0% Humboldin per acre 50 ml, respectively, with Wellada 2,4-D butyl ester, dimethyl tetrachlorine mixed spray. Use period and method: There are many types of herbicides in wheat fields, and the use period and method are the same. Winter wheat weeding can be performed twice in winter and spring. Winter control is usually carried out after the two leaves of wheat in mid-November, when the temperature is not less than 5 degrees Celsius, and in mid-March, the temperature rises above 5 degrees Celsius and the wheat is carried out before jointing. Tests have shown that the winter control effect is better than the spring control effect, and the traditional spring prevention and control is gradually developed to winter. The above agents are stem and leaf treatments, and evenly spray 40 kg of water per acre to make the weeds fully filled with the liquid to achieve the desired control effect. Note that the temperature is below 5 degrees Celsius, the effect of medication is poor, and the application of wheat after jointing is not safe. The 2,4-D butyl ester must be sprayed. Chemical weeding in corn fields Weeds in corn fields include crabgrass, goosegrass, green foxtail grass, alfalfa, cockroach and cockroaches. There are few weeds, fast growth, short-term short-term control, and grass shortage. In general, the ground is used to treat pre-emergence weed control. Post-emergence weed control is also being promoted. It is crucial to master appropriate control and use methods. In pre-emergence weeding in corn fields, commonly used herbicides include 40% aqueous B2O water suspension with 150-300 ml per mu, 50% Algae mix with 150 ml per mu, and 40% atrazine suspension with 150 ml per mu. Ninety-nine percent of Nienisi EC is used in 100 ml per mu, and 72% of Dole EC is used in 150 ml per mu. Appropriate period of application is before sowing after sowing, but can not be used later than weed 2 leaves. Corn Fields Spraying 40 kg ground water per acre, interplanting corn fields Wheat mash higher than the minimum water volume per acre of 50 kg Spraying, interplanting corn fields Wheat spraying between the interplanting rows before the harvest Medication dosage and water consumption per acre Can be halved. Post-emergence weed control in corn fields, currently promoting the best herbicides for 4% jade farm fungicide suspension with 50-60 ml per mu, 2.25% Kelser it (corn star) EC with 120 ml per acre, in the weeds 3- 5 leaves spray 40 kg of water evenly. Chemical Weeding in Peanuts and Soybean Fields In recent years, peanuts and soybeans have steadily increased in area, and chemical weeding has been widely applied. The main weeds are crabgrass, goosegrass, setaria, valerian, purslane, bayonet, grey ashes, The dominant weed populations from the monocotyledons to the monocotyledons were transformed from the cocoon to the dicot and cotyledon. Pre-emergence weed control: After sowing of peanuts and soybeans, 72% of Dole EC per acre can be used before emergence, 100-150 ml, 33.3% of Shida's supplemental EC can be used with 100-150 ml per mu, and 90% of Panacea can be used per mu. Milliliter, 50% acetochlor EC with 200 ml per mu, respectively, 40 kg of water per acre ground spray, can control annual grass weeds and some broad-leaved weeds. There are more dicotyledonous weeds and monocotyledon weeds, with 40% of the wettable powder per gram of 40% of the weeds plus 90% of the nymphs, 60 cc of water per mu, and 40 lbs of water, effectively preventing the common monocotyledons. Dicot weeds. Post-emergence weed control: After sowing of peanuts and soybeans, weed 3-5 leaf stage, with 6.9% Wei Pai 40-60 ml per mu, 10.8% high efficient cover grass can use 25-30 ml per mu, 15% fine stable kill Get 40-50 ml, 12.5% ​​take Fluocin net 40 ml per acre, 4% spray special 40 ml per mu, 20% fine gramine grass 30 ml per acre, spray water and 40 kg of stems and leaves separately, can prevent annual grasses Weeds. With 24% Kekule 8-10 ml per mu, 25% Huwei 60 ml per mu water 40 kg, can effectively prevent common broad-leaved weeds. Chemical Weeding in Vegetable Fields in Vegetable Fields: Weeds, ginger, garlic, leeks, potatoes, onion, cabbage, rapeseed, celery, parsley, carrots, eggplants, peppers, etc. Chemical weeding are all superior to artificial weeds. Labor, labor and production increase. Herbicide pre-emergence herbicides can be applied with 3.3% Shitian's 100-150 ml per acre of emulsifiable concentrate, 72% Dole EC 100-150 ml per acre, 43% ECA 250-300 ml per acre, and 23.5% cut grass per Mu 30 ml, 48% trifluralin EC 80-100 ml per mu, respectively, 40 kg of water on the ground spray. Herbicide post-emergence can be used 6.9% Wei Pai 40-60 ml per acre, 10.8% efficient cover grass can be 25-30 ml per mu, 12.5% ​​take flutter net 40 ml per acre, 15% fine steady kill per mu 40- 50 ml, 20% geranium per acre with 30 ml, respectively, spray 30-40 kg of stems and leaves of water. Chemical Weeding in the Shed Garden Watermelon Fields: The watermelons in the northern arch sheds and cover membranes developed rapidly in the off-season, watermelons were planted in many ways, the melon farmers were urgently required for chemical weeding, and many years of screening tests showed that watermelons were sensitive to multiple pesticides and their safety and efficacy were integrated. It is best for pre-emergence weed control in watermelon fields, but it requires strict and correct calculations. The Dole label specifies the amount of 100 ml per acre, and the average area of ​​the watermelon planted in the arch shed accounts for one-third or one quarter of the total area. Therefore, 25-33 ml of water is applied per acre for the actual arch shelter. China Agricultural Network Editor
Wriggled Machine,Dancing Machine,Waist Slimming Machine
Berkeley Electronic Technology Co., Ltd. , http://www.nbmassagebed.com