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1. Wheat field with monocotyledonous leaves, herbicides such as Hummer, Jinma and Shima.
2. Wheat field dominated by dicotyledonous broadleaf weeds, optional bensulfuron, thifensulfuron, 2,4-D butyl ester herbicide.
3. Single and dicotyled mixed wheat fields, which can be mixed with DuPont superstar or benzenesulfuron plus thrips.
Second, the best period of application of chemical herbicides in wheat field is the wheat tiller before winter and the early stage of wheat jointing. At this time, the medication has better control effect, and it is safer for wheat, but it is worse at night. Among them, the earlier the 2,4-D butyl ester is used, the better the use of benzosulfuron is to use before the wheat is greened. The crops produce phytotoxicity.
Third, the temperature and humidity when using the drug, the average temperature should be above 6 °C, in order to achieve better control results. For example, bensulfuron-methyl is sensitive to temperature, and can be controlled for 15 to 20 days or even 30 days after the drug is applied under low temperature conditions. Therefore, all herbicides should be used when the temperature is high on sunny days, and it is appropriate to use from 10 am to 3 pm. If the soil is used dry, the water consumption should be increased to ensure the control effect.
Fourth, strict doses should be strictly controlled, and can not be reduced or increased at will, so as not to reduce the control effect or produce phytotoxicity.
1. A wheat field dominated by monocotyledonous weeds, with a mixture of 6.5% Hummer emulsifiable concentrate 50 ml and 50 kg of water, the control effect is over 90%.
2. Wheat field dominated by dicotyledonous broadleaf, with benzsulfuron per hectare wheat field with 1.2 grams or 2,4-D butyl ester 50 ml per acre, spray 30-40 kg of water.
3. Single and dicotyledonous mixed wheat fields can be sprayed with 6.5% horror cream 50 ml and 7.5% superstar suspending agent 1 gram plus 20% to make it 30 ml spray on 50 kg of water, which is very effective.
Five, medication methods
1. Use herbicide to spread evenly. Should try to make the liquid wet the weed stems and leaves, but the liquid can not flow down, and do not spray heavily, do not leak, the water consumption per mu is not less than 30 kg.
2. Correctly master the preparation method. First, prepare the original drug into a mother liquid, add water to the sprayer, pour the appropriate amount of mother liquor, and finally add water to mix.
3. After the herbicide is applied to the water, a small amount of neutral detergent is preferably added to the liquid to increase the adhesion of the liquid to the weed leaves and improve the efficacy.
4. Spraying should be carried out in the absence of wind or breeze. When there is wind, it cannot be sprayed to prevent the liquid from drifting.
5. The sprayer should be cleaned after use, otherwise it will cause phytotoxicity to other crops.
Agricultural Bureau of Yucheng County, Shandong Province Han Zhongfang Hebei Science and Technology News
First, the choice of medicaments According to the type of weeds in the wheat field, herbicides are selected.
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