The slow release of herbicides in the low temperature period reduces the ability of weeds to absorb drugs and reduce their effectiveness. In addition, the following points should be used in the application of pesticides in addition to the use of pharmaceuticals for roads.
Precise use of weather medications The fall of temperatures in autumn and winter is often accompanied by windy weather, which is not conducive to herbicide efficacy, and should be applied during sunny days when the temperature is relatively high. At this time, the physiological metabolism of weeds is relatively strong, which is conducive to the drug in vivo. Conduction, weeding effect is good. It is difficult to kill weeds when they enter the wintering season, especially herbicides containing isoproturon, and use them at low temperatures may cause freeze damage to the wheat seedlings.
The application of pesticides is strictly controlled and the concentration of the application is strictly controlled so as to improve the weeding effect. Do not arbitrarily reduce the amount of water used to ensure a uniform application and prevent phytotoxicity.
Adding Nitrogen Fertilizer to Improve Control Effect When applying 2 A 4 Cl and other drugs to wheat fields, adding appropriate amount of nitrogen fertilizer such as urea can significantly improve control efficiency. The mechanism of action is that fertilizers such as urea can reduce the surface tension and pH of the herbicide solution and enhance adhesion.
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