How does wheat wild grass brome grass and Aegilops tauschii breed? How can it be cleared?

In recent years, a large number of wheat weeds have appeared in some wheat growing areas, such as "brome grass", "knot wheat" and "wild oat". This kind of wheat weeds are not easy to remove, and they still grow year after year. For this reason, farmers feel helpless and have a headache. What are the reasons for the wild reproduction of wheat weeds, and what are the ways to get rid of them?

The reasons for the wild reproduction of wheat weeds

The main results are as follows: 1. Wheat weeds are almost symbiotic with wheat, and it is not easy to find them in the seedling stage. When they mature, they will mature earlier than wheat and cannot be harvested together with wheat.

2. Wheat weeds are very similar to wheat. Most wheat herbicides can not effectively control wheat weeds, and they are especially easy to cause drug damage to wheat.

3. In the early stage, the small number of wheat weeds had little effect on wheat, so it could not be paid attention to by farmers, but it became extremely difficult to control when it propagated to a certain number.

4. In the past, after wheat harvest, most of the wheat weed seeds that fell to the ground would lose their germination ability with the burning of straw, but now the rise of straw burning and returning to the field provides protection for wheat weed seeds to a certain extent.

How can wheat weeds be removed?

1. Appropriate late sowing weather, time and other conditions permit, wheat can be sowed late appropriately, and after wheat weeds sprout, rotary tillage will cover them to suffocate in the ground. This method can only control the number of wheat weeds to a certain extent, and can't get rid of it completely.

2. During the period of 3-5 leaves before overwintering, most of the wheat weeds have emerged, and the tissue is young and the drug resistance is poor. In addition, the coverage area of the wheat field is small, the contact area between the drug and the weeds is large, and the drug absorption is large. At this time, the best time for drug use is good. 3% methyl disulfuron 20ml and alkyl ethyl sulfonate additive 60ml can be sprayed with water 30kg per mu of land, which should be used when the weather is good and the daily average temperature is not less than 10 ℃, otherwise it will affect the efficacy or increase the drug damage.

3. Manual removal during the period from heading to maturity of wheat, the remaining wheat weeds were removed by manual search.

4. Rotation fallow when the number of wheat weeds is very large and difficult to control, it can be rotated or fallow for one year, so that it can be removed to the maximum extent.