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It is often accompanied by windy weather after the temperature drop in autumn and winter. It is not conducive to the efficacy of herbicides. It should be applied at a relatively high temperature during sunny days. At this time, the physiological metabolism of weeds is relatively strong, which is beneficial to drugs in vivo. Conduction, good weeding effect. It is difficult to kill weeds when it enters the wintering period, especially herbicides containing isoproturon. When used at low temperatures, it may cause freezing damage to wheat seedlings.
Apply evenly and evenly, strictly control the application concentration to improve the herbicidal effect. Do not arbitrarily reduce the amount of water used to ensure uniform application and prevent phytotoxicity.
Adding nitrogen fertilizer to improve the control effect When applying 2 M 4 chlorine and other drugs in the wheat field, mixing with a proper amount of nitrogen fertilizer such as urea can significantly improve the control effect. The mechanism of action is that urea and other fertilizers can reduce the tension and pH of the herbicide liquid surface and enhance adhesion.
Key points for application of herbicides at low temperature
The application of herbicides in the low temperature period is slow to release, the weed ability of the weeds is reduced, and the control effect is reduced. In this regard, in addition to the selection of the right medicine, the following points should be mastered in the application of the medicine.
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