How to prevent wild oats from growing in wheat fields?

Wild oats, a very common weed, are widely distributed and basically occur in winter wheat planting areas. At the same time, it is harmless and has strong reproductive ability, and the seeds survive in the soil for a long time, which affects the normal growth of wheat.

Wild oat is a grass weed. Although they are different from wheat in appearance, they have many similarities. I remember a joke. There used to be a young man who was idle and didn't farm. One year, his father was ill and asked him to pull weeds. Because he couldn't tell wild oats from wheat, he pulled out all the wheat. Although it is a joke, it does exist in reality.

In this paper, the little helper will introduce the growth characteristics, transmission route, harm degree and prevention methods of wild oats in detail, and then start to explain them in detail.

Characteristics of 1. Wild oats 1. From the leaf analysis, it is a little narrower than wheat, as can be seen from the above picture.

2, from the leaf stem, there will be symptoms of redness, which is a very important feature.

3. Observe the leaves carefully and find that there is fluff on the leaves, but wheat doesn't.

4. From the inflorescence analysis, it is pyramid-shaped, with angular branches and rough feeling.

The above characteristics can quickly distinguish wild oats, but in their seedling stage, they need to be carefully distinguished. When you grow up, the above characteristics will become more and more obvious. After talking about the characteristics, let's talk about the harm of wild oats.

Second, the harm of wild oats is 1. It will compete with wheat for water, fertilizer and sunshine. Because it belongs to Gramineae and has strong growth ability, the base fertilizer used for planting wheat is certain. If there are too many wild oats in the field, they will absorb more nutrients. On the contrary, the less wheat absorbs, which is not conducive to the growth of wheat. Similarly, water is the same, and the competition for sunshine is the same.

2, strong adaptability, better adaptability than wheat in the change of external temperature, stronger growth ability than wheat, which is not conducive to the normal growth of wheat.

3. Strong reproductive ability, the number of seeds on a plant can reach about 500. If it is allowed to propagate, it will seriously affect the normal growth of wheat and cause yield reduction.

Generally speaking, the harm of wild oats is to compete with wheat. If it is not cleared, the growth of wheat will be affected. Understand the harm of wild oats, and then talk about the causes of wild oats.

Thirdly, the transmission route of wild oats is 1. Seed spread. After wheat harvest, some wild oat seeds were mixed in it (impurity removal was not good), and then planted with wheat the next year, and then began to harm.

2. Harvester diffusion. At present, harvesters are basically used to harvest wheat. Suppose that when there are a lot of wild oats in plot A, after harvesting the wheat in plot A, the harvester will carry some wild oat seeds, and then when harvesting the wheat in plot B, the wild oat seeds will fall into plot B more or less, and then wait until the appropriate temperature to start breeding.

3. Spread with the wind and rain, such as windy and rainy weather, wild oat seeds will spread with the wind and rain, wherever they blow and flow, and continue to spread when they encounter wind and rain.

Most of the above three modes of transmission are the first. Some people say that this is inevitable, but try to remove impurities and avoid more harm from wild oats. Once found, it must be prevented in time. Let's talk about the prevention and control methods of wild oats.

4. Prevention and control measures of wild oats 1. Before sowing, remove impurities in wheat to ensure the purity of wheat as much as possible.

2. Friends with small plots and time can manually pull them out and bring them out.

3, herbicide control, this is also of interest to everyone. At present, there are many wheat gramineous herbicides on the market, and there are also many herbicides used to control wild oats. Propargyl and fenoxaprop-p-ethyl are common. Some friends have responded that the above chemicals have great resistance in the local area, and the effect is average. You can also choose imported chemicals, such as methyl disulfonate, fenoxaprop-p-ethyl and fluconazole. If it is not enough, then combine them with each other.

Finally, I would like to remind you that when controlling wild oats, it is recommended that you choose to spray pesticides years ago, and be careful not to spray or miss spraying. Secondly, it is very important that the temperature when spraying pesticides should be above 10 degrees. If it is not above 10 degrees, it should be above 6 degrees, in sunny and windless weather, after 10 in the morning.