Herbicides used at low temperatures
2023-05-14 21:07:20
In the winter and early spring, the growth of crops and weeds is relatively slow, but the growth rate and growth of weeds are faster than the crops. Therefore, it is necessary to implement chemical weeding on winter crops. However, the effect of using herbicides in the cold season is often not as pronounced as the season when the summer and autumn temperatures are high, and sometimes it may not show a certain effect in the short term, which is mainly due to the poor release of herbicides due to the low temperature conditions. Some, on the other hand, have the ability to absorb weeds as well as the ability of weeds to decrease. Moreover, the medicines are slowly absorbed and slowly absorbed and decomposed by weeds to reduce or even completely disable the effect. In order to increase the use of herbicides, in addition to herbicides on the road, the following techniques should be technically mastered:
1. Take advantage of the weather. The low temperature in winter and early spring, often accompanied by strong winds, is not conducive to the exertion of efficacy. Therefore, it should be taken during sunny hours when the temperature is relatively high. At this time, the physiological metabolism of weeds is relatively strong, which is conducive to the conduction of the weeds in the body of the weeds. The decomposition of the weeds is difficult, and the weeding effect is easily received.
2. The application of pesticide should be thorough and uniform. The application of water should be strictly according to the dilution of water, but also can not arbitrarily reduce the amount of water. When spraying, attention should be paid to thoroughness, uniformity, no heavy spraying, no leakage of spray, and weeds should be sprayed on all weeds.
3. Choose a variety of ways to use. Some herbicides are mixed with soil to form toxic soils or mixed with fertilizers to make them into toxic fertilizers. They are safe to use at low temperatures, and their efficacy is also stable. When using oats, 500 grams of oat enemies can be mixed with 50 kg of fine soil, sand or 7.5 kg of urea or 15 kg of superphosphate. When mixed, a small amount of water is sprayed to fully bind the medicine and soil or fertilizer. Immediately after the application, the land is sprayed and the medicinal soil or medicinal fertilizer is thoroughly mixed with the soil to enhance the weeding effect.
4. Add nitrogen fertilizer to increase the weeding effect. The use of 2,4-D sodium salt in the wheat field when mixed with ammonium nitrate, ammonium sulfate, and urea can significantly increase the herbicidal effect of the 2,4-D sodium salt. Because of the addition of chemical fertilizers, the surface tension and pH of the solution are reduced, the adhesion of the agent is enhanced, and the herbicidal performance of the herbicide is improved.
1. Take advantage of the weather. The low temperature in winter and early spring, often accompanied by strong winds, is not conducive to the exertion of efficacy. Therefore, it should be taken during sunny hours when the temperature is relatively high. At this time, the physiological metabolism of weeds is relatively strong, which is conducive to the conduction of the weeds in the body of the weeds. The decomposition of the weeds is difficult, and the weeding effect is easily received.
2. The application of pesticide should be thorough and uniform. The application of water should be strictly according to the dilution of water, but also can not arbitrarily reduce the amount of water. When spraying, attention should be paid to thoroughness, uniformity, no heavy spraying, no leakage of spray, and weeds should be sprayed on all weeds.
3. Choose a variety of ways to use. Some herbicides are mixed with soil to form toxic soils or mixed with fertilizers to make them into toxic fertilizers. They are safe to use at low temperatures, and their efficacy is also stable. When using oats, 500 grams of oat enemies can be mixed with 50 kg of fine soil, sand or 7.5 kg of urea or 15 kg of superphosphate. When mixed, a small amount of water is sprayed to fully bind the medicine and soil or fertilizer. Immediately after the application, the land is sprayed and the medicinal soil or medicinal fertilizer is thoroughly mixed with the soil to enhance the weeding effect.
4. Add nitrogen fertilizer to increase the weeding effect. The use of 2,4-D sodium salt in the wheat field when mixed with ammonium nitrate, ammonium sulfate, and urea can significantly increase the herbicidal effect of the 2,4-D sodium salt. Because of the addition of chemical fertilizers, the surface tension and pH of the solution are reduced, the adhesion of the agent is enhanced, and the herbicidal performance of the herbicide is improved.
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