In recent years, chemical weeding has been widely used in wheat production due to its characteristics of low investment and labor saving. However, due to inaccurate selection of herbicides, optimum application period, application amount, and concentration of pesticides, some farmers do not achieve the desired herbicidal effect after application. Therefore, in order to improve the application of herbicides, The effect must pay attention to the following questions:
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First, choose the right herbicides on the road according to the type of weeds in the wheat field, use high-efficiency herbicides that are absolutely safe for the after-crop crops. For more wheat fields with more monocotyledonous weeds, weed herbicides should be used in addition to monocotyledons. Can be used 3% Shima oil suspension 30 ml plus adjuvant 50-100 ml watered 40-50 kg, spray control. For wheat fields with more dicotyledonous weeds, weed herbicides with dicotyledonous weeds should be selected. Can choose 10% Tribenuron-methyl 10g or 75% superstar 1g watered 40-50 kg to eliminate the rule.
Second, to grasp the best time for drug use: Most farmers in the wheat field of chemical weeding in the spring, the spring application of herbicides, we must strictly master the best drug use time, we must catch the spray before the jointing of wheat control. Due to the large amount of herbicide applied in spring and the suppression of weed growth after application, it is very difficult to kill weeds. In addition, the large residual amount of pesticides in the evening will cause different levels of pollution to the crops and the environment. If the previous year's application of pesticides, grass-age small anti-effects, and the province than the year after the provincial pharmaceutical drugs, which can reduce the cost of wheat production and reduce pollution.
Third, do a scientific application of herbicides: (1) to master the amount of medication. Herbicides must be dispensed strictly in accordance with the instructions for use of the herbicides. It must be ensured that the herbicides will kill weeds without damaging the wheat seedlings. And medication should be uniform, so that you can neither re-spray nor spray. (2) Pay attention to the temperature at the time of application. It should be applied when the temperature is high on sunny days in order to fully develop its efficacy. In early spring, the temperature is unstable, the cold current is high, and the windy weather is high. Therefore, pay close attention to the weather forecast during application, and do not apply pesticides before or during cold spells. Select the high temperature, sunny and no-wind spraying, the best control effect. (3) Ensure proper humidity. Soil moisture is an important factor affecting the efficacy of the drug. If the soil is wet and the weeds thrive, it will help the weeds absorb the herbicides and operate in the body. Therefore, the medicinal effect is fast and the herbicidal effect is good. If the climate is dry and the soil moisture is small, the amount of water used should be increased when spraying herbicides, and the amount of surfactant and surfactant should be added to increase the weeds' absorption of chemicals so as to achieve better control effects.