In terms of weeding in wheat fields, the following issues require attention: Can not be remedy Each herbicide has its herbicide spectrum. When the herbicides are used, they should be selected according to the type of weeds in the field. If we do not understand the type of weeds, blindly purchasing herbicides will only have a double effect. . Excessive use caused wheat injury Herbicides selectively kill weeds between wheat and weeds. The selectivity is dose-limiting. Therefore, the greater the amount of herbicides that are not used, the better. Exceeding their safe dose will affect wheat yield. Late use affects drug efficacy In actual production, weeds begin to excavate at the time of wheat emergence, and reach the first peak of emergence before winter. This part of the weeds harm wheat more than weeds unearthed in the winter, and this part of the weeds is controlled before winter due to The seedlings are small and grow weak and do not require high-dose herbicides to effectively control them. However, in most parts of China, the habit of farmers in the application of pesticides is the spraying of herbicides after the return of wheat in the winter. At this time, the weeds that emerged before the winter season have a large leaf age and require a higher dose of herbicide to kill them. The single use of herbicides causes frequent weed resistance to use the same or the same type of pesticides in successive years. Weed resistance is frequent, and it also leads to an increase in the population density of intractable weeds, which intensifies the succession of weed communities in wheat fields and increases the difficulty of control. . Weed control and prevention of grass weeds have resulted in reduced yields At present, due to the lack of broad spectrum, safe, and efficient grass weed herbicide varieties, the population density of grass weeds in wheat fields has increased. To solve the above problems, it is necessary to strengthen the monitoring and early warning of weeds, to grasp the species and development dynamics of field weeds before spraying, and to select pesticides according to the weed species; in the spraying time, the spring spraying is to be sprayed before the tillering period of autumn wheat; In terms of pesticide application methods, safe and rational application of pesticides should be carried out without overdosing the pesticides, without heavy sprays; the herbicides with different mechanisms of action should be used alternately and the herbs with different spectrums should be mixed; the development and screening of the target agents should be strengthened. Related supporting technology research. Halloween Gummies,Halloween Gummy Candy,Halloween Gummy Worms,Jelly Halloween Gummy Montreal Shantou Food Co., Ltd , https://www.montrealsnack.com
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