Wheat field herbicides should not be too blind when used. Pay attention to the following ten precautions for wheat field herbicides: 1. Doing research is the foundation. Nowadays, the grass and grass are very different. The agricultural technicians often go deep into the field to “see, smell, ask, and cut†and fully grasp the front line information to understand the main weeds in the wheat field, the most common weeds or the weeds. In order to correctly guide the medication. 4. Pay attention to the weather changes before applying the medicine. It is not advisable to use the medicine when there is a strong cooling in 2~4 days before application. 5, the second dilution is neglected. Most of the herbicides in the wheat field are used in a small amount. In preparation, it is better to dissolve the wettable herbicide in a small amount of water to make the mother liquor, then install the semi-spray water, pour the mother liquor, add the required water, and finally apply evenly. If the wettable powder is mixed with the emulsifiable concentrate, the wettable powder should be made into the mother liquor, then the emulsifiable concentrate should be poured, and finally the necessary water is added to spray evenly. Because the current compounding products are particularly numerous, the second dilution method can be used to mix the liquid evenly and thoroughly weed. 6, strictly control the dosage, can not be increased or decreased at random, for some new herbicide varieties, must not be used blindly. Ten precautions for wheat field herbicides, keep in mind, beware of wheat phytotoxicity
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2. Choosing a good product is the key. Nowadays, there are many products in the market, so we must choose good quality products. Secondly, we must use different herbicides for different grasses and grasses. For the plots where the seedlings are severely affected, the effect of using 2, 4 and 4 chlorine is very good. For the plots where the malignant weeds such as swine fever and lacquer are serious, the use of benzenesulfuron alone is less than ideal. Some compound products are available. Therefore, to achieve the desired control effect, it is the key to choose a good product.
3, spraying time must be in the wheat before returning to the jointing, the daily average temperature is stable above 10 degrees, after the jointing of wheat can not continue to use chemical herbicides to prevent the occurrence of phytotoxicity.
7, the application of drugs should be selected. In order to achieve the best application effect, it is recommended to use manual or airborne sprayer. It is strictly forbidden to use mist sprayer because the target of the mister is not clear, the liquid is easy to drift, and the weed can not be effectively used, which is easy to cause other crops. Damage, plus the droplets are too small, the water is easy to evaporate, and even when the concentration of the liquid is too large, it is easy to cause damage to the crop.
8. When spraying, be even and thoughtful, so as not to leak or spray.
9, observe the grass to determine the dose. (1) Grass age. The best period for weed control is generally in the vigorous growth period of weeds 2-4 leaves, weeds above 5 leaves tend to age, strong drug resistance, crop cover, and the speed of dead grass after spraying is relatively slow, should be considered grass The age is appropriately increased in dose. It is best to grasp the best application period, do not wait until the grass grows up before applying the medicine. (2) Weed species. The sensitivity of different weeds to the same agent may be different. Different herbicide varieties may be used or consulted with local agricultural technology departments to take corresponding measures to achieve the desired herbicidal effect. To prevent perennial weeds, it is necessary to increase the dosage. Some contact herbicides are not effective for perennial weeds, so you should choose to use them. (3) Weed density. When the weeds in the field are too dense, the water consumption and dosage should be appropriately increased.
10, the rotation is not forgotten, I want to be careful. Most herbicides have a residual period in the soil for a certain period of time. It is related to the application time, the length of the variety, and the physical and chemical properties of the soil. For example, if you plant peanuts, soybeans, cotton, and vegetables on the plot, you should try to choose a variety with a shorter residual period. In areas where conditions permit, try to apply the medicine as early as possible. Otherwise, it is easy to affect the crops, and there may be phenomena such as weak seedlings, yellow seedlings, rotten roots, and dead seedlings. 
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