The use of herbicides in wheat fields not only saves labor and weeds, but if used improperly, it will not only fail to achieve the desired herbicidal effect, but will cause serious injury and even greater damage. The following problems should be noted when using herbicides.
1, according to the main types of weeds in wheat fields, use appropriate herbicides.
2. Reasonably arrange the application time. Although selective herbicides are used in wheat fields, the selectivity of these herbicides is relative. Only when they are used in the wheat resistance period and weed sensitive period can they receive the ideal weed control effect and exceed the wheat safety period. Can cause phytotoxicity. Different kinds of herbicides have different safety periods for wheat. Read the instructions for use carefully before use.
The weather will affect the herbicidal effect of herbicides. Spring wheat fields should be sprayed on sunny, high-temperature, and wind-free weather conditions. After the dew had dried in the morning, the spraying effect was good before 3-6 pm, and the rain occurred 4 hours after the drug, which did not affect the efficacy and did not require heavy spraying.
3, accurate master dosage. According to the instructions for use, determine the amount of medication, then dilute with water, evenly spray, avoid re-spray or leakage. If it is missed, it will inevitably increase the weeding dose in other areas and cause phytotoxicity. With respect to the amount of watered, within the requirements of the specification, the more watered, the better the effect.
4, the correct use of herbicides. In wheat fields where different types of weeds are mixed, can herbicides with different herbicide spectrum be used in combination to increase the weeding effect? There are many types of herbicides. If two kinds of herbicides can be used together, local plant protection personnel must be consulted. Before a reliable answer can be found, they cannot be easily mixed.
Before spring wheat is returned to green before jointing, the focus of prevention and control of diseases, pests and weeds in wheat is:
1. Do a good job of investigating and preventing wheat spiders. When the amount of wheat spiders in the wheat field reaches the target for prevention and control, timely medication control. According to the type of wheat spiders, select the appropriate agent for spraying. Optional agents are: dicofol, fenpropathrin, anthrone, etc.
2, in the yellow dwarf disease area, the spring should pay attention to the prevention and treatment of wheat bran in order to prevent the spread of yellow dwarf disease.
3, do a good job of wheat field weed control. According to the weed species, select the appropriate herbicide.
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