Problems to be Noted in Using Herbicides in Corn Planting
In the northern spring corn field, due to the low temperature and drought during the sowing of corn, in order to ensure good weed control before sowing, the soil application before seedling must be thoroughly watered, fine soil preparation, suppression after sowing, and then weeding. The agent, if the soil moisture is not good, after the application of light soil (2 ~ 3 cm) or into the sprinkler, in order to improve the weeding effect, but also due to low temperature and less rain when applied, and the distance between the late sowing of the wheat sowing period is longer, The dosage can be applied according to the upper limit of the recommended dosage or the dosage should be increased to ensure a higher weeding effect. Xia Yu Picture-Advertising Advertisement in North China PIP Advertising End Rice is sown from late May to mid-June. At this time, it has entered the summer season. The temperature is high, rainfall is high, and weeds grow rapidly. If they are not controlled in time, they may cause grass shortages and reduce production. Chemical weeding should be done after planting. Pre-soil treatment is the mainstay. Since the sowing date of summer corn is shorter than the sowing time of the crop after late crops, we should pay attention to the effect of the herbicides on the crops of post-cultivated crops. For example, atrazine is one of the commonly used herbicides in corn fields, but the field life is very long. Long, if the dosage is too large or the application is uneven, it will cause residual phytotoxicity to crops of postharvest crops. The length of the residual period of Atrazine is affected by many factors, and the application amount per unit area is a key factor. The amount of pesticides used is large, and there are many residual pesticides in the soil. When the atrazine content in the soil is greater than 0.1 mg/kg, it affects the germination and growth of wheat. The attrition rate and spraying uniformity of atrazine, soil texture, The amount of rainfall, soil pH, and other factors are magnetic. Studies have shown that the daily application of 38% of indozantine suspension in each part of the summer maize in North China is a critical value. If this amount is exceeded, it is easy to produce phytotoxicity on the crop of postharvest crops. Depending on the local conditions, various places can use the appropriate amount of drugs, and Corn Po, 40% Acetonitrile Water Suspension, and 50% Coated Pods are all safe and efficient broad-spectrum herbicides for corn and after-crop crops. The high temperature during sowing of corn and more rainfall will benefit herbicides, and the lower limit of the recommended dosage or the appropriate reduction in the dosage can also be used to achieve a higher weeding effect.
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