Matters needing attention when weeding corn

Corn is one of the main food crops in China, and the planting area in our country is also very large. When planting corn, our manual management is very important, especially the weeding work. Reasonable weeding is the key to ensure the healthy growth and improve the yield and quality of corn. So there are a lot of things we need to pay attention to when weeding. So what are the precautions when weeding corn? Let's take a look at it with the editor.

1. Weeding time

After spraying herbicides on corn seedlings, it usually takes about 3-5 hours to absorb, during which the efficacy of herbicides is closely related to temperature and humidity. If the spray is sprayed in the time of high temperature and drought, the volatilization rate of the liquid will be faster because of the strong light and high temperature. After spraying, the liquid will be evaporated, thus affecting the effect of weeding, and corn seedlings are also very easy to appear crucial. Therefore, it is best to spray every evening, when the temperature is not high, the humidity is relatively high, herbicides can be fully absorbed, but also can reduce the incidence of drug damage.

2. Weed size

After spraying herbicides, many farmers have a misunderstanding that the smaller the weeds are, the easier it is to get rid of them and don't worry too much. In fact, this is a wrong idea, so if the area of grass is too small, then its drug area is also very small. Therefore, its weeding effect is not ideal compared with large areas of weeds. Therefore, it is best for us to weed when the weed grows to a certain size, usually when the weed grows from two leaves to four leaves. At this time, weeds not only have a certain drug area, but also have relatively small resistance, and the weeding effect will be more obvious.

3. Corn seedling size

When we spray herbicides to weed, we should not only pay attention to the size of weeds, but also pay attention to the size of corn seedlings. It is best to spray herbicides on two to five leaves of corn seedlings. Because at this time, the resistance of corn seedlings is relatively high, which can reduce drug damage offline. In front of the leaves, can be sprayed to the field, after the six leaves spray, then the position of the main sprinkler, not too high, should be sprayed on the corn plant. Avoid drug damage to corn seedlings caused by liquid perfusion, and do not spray too early, otherwise it is very easy to lead to the death of corn seedlings.

4. Weed resistance

We should also pay attention to the resistance of weeds, because over the years, continuous spraying of herbicides has led to increased resistance to weeds. The resistance of weeds themselves is also increasing, and weeds grow gray and short in order to avoid evaporating too much water. This kind of weed usually has villi all over the body, mainly to reduce water evaporation. Therefore, when spraying the medicine, the liquid is easy to be "stopped" by these villi, and the absorption capacity of the weed itself is not strong, so the effect is naturally not very obvious. Therefore, when we apply pesticide at high temperature, we should pay attention to increase the dosage as much as possible to ensure the efficacy.

The above is a brief introduction to the matters needing attention when weeding corn. In addition, we should also pay attention to various problems such as the variety of weeds and the mixed use of pesticides to avoid affecting the efficacy. That's all for today's introduction. Thank you for your reading and support.