At present, it has entered the warm spring season, and wheat has entered the greening period, and the weeds have reached a prosperous period. At this time, it is a good time to weed in the wheat field. The weeds in the current period are fast growing, long in quantity, and strong in drug resistance. It is necessary to select appropriate drugs and increase the dosage to achieve good results. Farmers must seize this good time for weeding. It is necessary to pay special attention to it: it is a three-point drug, so it is necessary to take scientific methods and control the dosage and concentration when using the drug, so as to prevent the weeds from being removed, and the wheat seedlings are harmed by the drugs. So, how to operate most efficiently when spraying and weeding in the spring wheat field? What key issues need to be noted at the same time? First, the selection of herbicides and formulas should be correct The herbicides in the wheat field cannot be used arbitrarily. It should be determined according to the main weed species in the field and the herbicidal spectrum of the herbicide. Especially for the wheat fields mixed with various weeds, several herbicides should be mixed and applied according to a certain ratio to achieve expansion. The range of weeding species and the purpose of improving weeding effect. 1. For the plots of stalked wormwood, leeks, maijiagong, ion grass, valerian, medlar, etc., it is recommended to use 10% bensulfuron-methyl WP 10g/mu, or 75% benzene per acre. The sulfonated water dispersible granules are 1 g/mu, and 30-40 kg per acre of water is mixed and sprayed. 2. For plots based on buckwheat, it is recommended to use 70% fluzolone-sulfuron-dispersed granules of 3-4 g/mu, and mix 30-40 kg per acre of water for spraying. 3, the main plot of the bowl of flowers, it is recommended to use 20% flufenoxyacetate EC 50-70 ml / acre, 30-40 kg per acre of water mixed and sprayed. 4, to see the Mai Niang, sedge grass-based plots, it is recommended to use 10.8% oxazolyl grass emulsifiable concentrate 30-40 ml / acre, or 15% acetylene oxalate wettable powder 30-40 g / acre, per acre After 30-40 kg of water is mixed and sprayed, 30-40 kg of water per acre is mixed and sprayed. 5. For plots mixed with brome and broadleaf weeds, it is recommended to use 70% fluzolone-sulfonate dispersible granules 3-4 g/mu + 10% benzenesulfuron-methyl WP 10 g/mu. 30-40 kg of water per acre is mixed and sprayed. In summary: wheat fields dominated by broadleaf weeds can be sprayed with 10% bensulfuron-methyl WP or 75% sulfonate dry suspension or 72% 2,4-D butyl emulsifier; Wheat fields such as wheat and weeds, which are mainly weeds, can be sprayed with 3.6% methyl disulfuron suspension; broadleaf weeds and grassy weeds such as stalks are mixed, and 3.6% can be used. Spraying bismuth sulfonate + methyl iodsulfuron sodium salt dispersing granules. In addition, we must pay attention to eight points when spraying chemical weeding to get the best results: 1. Pay attention to the dispensing method: no matter which type of herbicide, it should be scientifically prepared according to the amount per acre and the amount of water per acre. Firstly, it is formulated into mother liquor, and then diluted twice. It should not be directly added to the cartridge to add water. 2, pay attention to the concentration of the drug solution: the concentration of the drug solution, must be strictly in accordance with the herbicide instructions for use, do not arbitrarily reduce or increase the concentration of the drug solution, if you do not know the configuration before consulting the relevant technical staff. 3, pay attention to spray spraying period: wheat greening to jointing period, is the best period of chemical weeding, premature control effect is not good, too late is prone to phytotoxicity. 4. Pay attention to the timing of spraying: When spraying, choose the sunny and windless day, the temperature in the daytime is stable at 10 degrees or more, and there is no frost and heavy rain for four consecutive days. The spraying time is best from 10:00 am to 5:00 pm. . 5, pay attention to the choice of spraying equipment: sprayed with the herbicide herbicide equipment should not be used, do not use the equipment that runs serious drip, do not use the atomized equipment. 6, pay attention to wheat disease do not use drugs: In recent years, wheat frequently occurs sheath blight, root rot, total erosion and other diseases, if the wheat has been diseased, it is best not to apply herbicides. Before spraying and weeding, be sure to check if the wheat seedlings are sick. 7, pay attention to watering time after spraying: within five days after spraying the herbicide in the wheat field, avoid flooding with large water, otherwise it will easily cause phytotoxicity of wheat seedlings. In addition, some wheat fields may have a short yellowing of the tip of the leaves after the herbicide is applied. But don't worry, this kind of phenomenon belongs to the normal seedling phenomenon of wheat. It usually recovers itself during the greening period. This phenomenon will not affect the growth of wheat or reduce the yield of wheat. On the contrary, it can prevent wheat from affecting normal growth and development due to excessive vegetative growth. It can also promote a certain amount of wheat production. Freeze Dried Products, Freeze Dried Vegetables, Frozen Dried Food, Premium Freeze Dried Green Vegetables, FD Vegetables Jiangsu Tiankang Food Co., Ltd. , https://www.tiankangfood.com
