Corn is the main autumn grain crop in our province, with a planting area of ​​more than 30 million mu per year. In the cultivation of corn, in order to control weeds, herbicides are commonly used.
Chemical weeding has been accepted by farmers because of its advantages of fast, efficient and easy operation. Especially in the summer maize growing season, due to high temperature, high humidity, rapid growth of weeds, and often rainy weather in summer, artificial and mechanical control of weeds is more difficult, but chemical weeding can overcome these shortcomings. In the process of chemical weeding, if the chemical herbicides are improperly selected and the application method is improper, it will cause adverse effects such as poor control and even phytotoxicity. Therefore, it is hoped that farmers' friends will choose the correct type of herbicides and adopt scientific techniques and methods to master their application techniques. When conducting chemical weeding, you should pay attention to the following issues:
First, find out the types of weeds.
The common weeds in corn fields in our province mainly include crabgrass, goosegrass, valerian, purslane, anti-branched stalk, snail, scorpion, teff, green dog tail, iron leeks, and fragrant aconite. Among these weeds, there are grass weeds such as crabgrass, goosegrass, etc., as well as broadleaf weeds such as anti-twigs, and more refractory, fertile weeds such as fragrant aconite. Tian Xuanhua, purslane, etc. When chemical weeding is carried out, the drug should be selected according to the type and distribution of weeds.
Second, choose the appropriate herbicide variety.
At present, there are many varieties of herbicides on the market, the names are strange, and the fish are mixed. It is very difficult to select a suitable herbicide variety among a wide variety of varieties. Several selection methods are now presented for reference.
1. Do not look at the ads to see the effectiveness. In the case of inaccuracy, the first choice is the varieties that have been used in previous years, such as Xuanhua E, Ma Bao, Yu Bao, etc. These varieties have been tested for many years of production practice, safe and effective, bold Use.
2. Selected varieties for weeds. The general weeds can be completely controlled by Xuanhua E, Ma Bao and Yu Bao. Different types of weeds are different, and the herbicides selected are not the same. For example, the severe field of fragrant aconite can be controlled by selecting Jinyi or Aconite.
3. Choose the variety for the mouth. For example, most of the fields use mechanical harvesting of wheat, high wheat, high grass, and general herbicides are not effective, and can be quickly blocked or 52% new Xuanhua.
4. Choose the variety according to the time. There is no time to apply the herbicide at the time of sowing. When the weeds are seen, the corn has also emerged. At this time, herbicides such as Yubao, Yubei, Kangshi, Jinyi, and Fuziqing can be used.
Third, pay attention to local conditions and rational use of drugs. With a suitable herbicide variety, it can be said that the control effect has reached 50%. However, if it is not properly applied, it is difficult to achieve the desired control effect, and even cause phytotoxicity. If the corn is chemically weeded after the three-leaf period, the nozzle of the sprayer should be lower than the height of the bell mouth to prevent the liquid from being sprayed into the heart of the bell mouth. In addition, attention should be paid to the weather conditions when applying the medicine, and it is generally required to apply the medicine on a windless day. When applying under drought conditions, the amount of water should be increased or applied after watering.
Chemical weeding has been accepted by farmers because of its advantages of fast, efficient and easy operation. Especially in the summer maize growing season, due to high temperature, high humidity, rapid growth of weeds, and often rainy weather in summer, artificial and mechanical control of weeds is more difficult, but chemical weeding can overcome these shortcomings. In the process of chemical weeding, if the chemical herbicides are improperly selected and the application method is improper, it will cause adverse effects such as poor control and even phytotoxicity. Therefore, it is hoped that farmers' friends will choose the correct type of herbicides and adopt scientific techniques and methods to master their application techniques. When conducting chemical weeding, you should pay attention to the following issues:
First, find out the types of weeds.
The common weeds in corn fields in our province mainly include crabgrass, goosegrass, valerian, purslane, anti-branched stalk, snail, scorpion, teff, green dog tail, iron leeks, and fragrant aconite. Among these weeds, there are grass weeds such as crabgrass, goosegrass, etc., as well as broadleaf weeds such as anti-twigs, and more refractory, fertile weeds such as fragrant aconite. Tian Xuanhua, purslane, etc. When chemical weeding is carried out, the drug should be selected according to the type and distribution of weeds.
Second, choose the appropriate herbicide variety.
At present, there are many varieties of herbicides on the market, the names are strange, and the fish are mixed. It is very difficult to select a suitable herbicide variety among a wide variety of varieties. Several selection methods are now presented for reference.
1. Do not look at the ads to see the effectiveness. In the case of inaccuracy, the first choice is the varieties that have been used in previous years, such as Xuanhua E, Ma Bao, Yu Bao, etc. These varieties have been tested for many years of production practice, safe and effective, bold Use.
2. Selected varieties for weeds. The general weeds can be completely controlled by Xuanhua E, Ma Bao and Yu Bao. Different types of weeds are different, and the herbicides selected are not the same. For example, the severe field of fragrant aconite can be controlled by selecting Jinyi or Aconite.
3. Choose the variety for the mouth. For example, most of the fields use mechanical harvesting of wheat, high wheat, high grass, and general herbicides are not effective, and can be quickly blocked or 52% new Xuanhua.
4. Choose the variety according to the time. There is no time to apply the herbicide at the time of sowing. When the weeds are seen, the corn has also emerged. At this time, herbicides such as Yubao, Yubei, Kangshi, Jinyi, and Fuziqing can be used.
Third, pay attention to local conditions and rational use of drugs. With a suitable herbicide variety, it can be said that the control effect has reached 50%. However, if it is not properly applied, it is difficult to achieve the desired control effect, and even cause phytotoxicity. If the corn is chemically weeded after the three-leaf period, the nozzle of the sprayer should be lower than the height of the bell mouth to prevent the liquid from being sprayed into the heart of the bell mouth. In addition, attention should be paid to the weather conditions when applying the medicine, and it is generally required to apply the medicine on a windless day. When applying under drought conditions, the amount of water should be increased or applied after watering.
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