China is a big wheat grower, especially in the north, where wheat cultivation is very common. For wheat planting, the problem that growers are distressed is weeds. For example, the growth of wheat and oats in the wheat fields, robbing wheat for growth and nutrition is not conducive to the harvest of wheat. So how do you control these two kinds of weeds? Let's take a look at the following.
Reasons why wheat weeds are difficult to prevent
The main factors in the transmission of wheat and oats are the impureness of wheat, the spread of the harvester, and the application of animal droppings carrying the stalked wheat seeds. Is it so difficult to prevent it?
The wheat and oats in the seedlings are similar to the wheat in appearance at the seedling stage. It is difficult to distinguish them from the last mature seed, and belongs to the same family as the wheat, and its growth period is short and mature, so it has been It is more difficult to prevent. And most of the herbicides have no good effect on these two plants. And the wheat can be wintered with seedlings or tillers in winter, and the seeds that have not sprouted before winter in the coming spring can continue to germinate, and the seeds can also be flowered.
How to control the effect of wheat and oatmeal?
First, effective herbicides with high safety, such as acesulfame, flufensulfuron, methyl disulfuron, etc., can be selected.
The second is to pay attention to the period of application. The effect of sealing and controlling before sowing is the best. If there is no prevention before planting, the second best prevention period is about 35 days after sowing of wheat. At this time, wheat has grown 4 Leaves are relatively safe.
The third is the spring of the following year, the temperature rises above 5 °C, although the control effect is poor, but the spray can save a lot of cost compared to manual extraction.
How should other herbicides in the wheat field be selected?
Wheat field removal should be determined based on the species of weeds and the herbicidal spectrum of the herbicide. Choose the right herbicide for different weeds in the wheat field.
1, broad-leaved weeds such as sage, leeks, maijiagong, ion grass, yarrow, medlar, etc., should use 10% bensulfuron-methyl WP powder 75% benzene sulfonate water dispersion granules.
2, buckwheat can choose 70% fluzolone sulfonate water dispersion granules, the amount of 3-4g per mu, bowl of flowers can use 20% flufenoxyacetic acid emulsifiable concentrate, the amount of 50-70ml.
3, look at Mai Niang, Valerian can use 10.8% oxazoin grass emulsifiable concentrate, the amount of 30-40ml.
Can the last herbicide be used year after year?
As the saying goes, it is a three-point drug. Whether it is a herbicide or another drug, continuous use will definitely bring a lot of negative effects. If there are a lot of weeds in the field every year, it must be played every year, if the head After the annual medication, if the amount of grass is not large in the next year, there is no need to spray it. There is also the application of drugs for years, and the resistance of grass will increase.
Suggest:
For the prevention and control of wheat, when methyl disulfuron is applied, it is important not to re-spray in the same year. Because the main control object of methyl disulfuron is the weed that is closely related to wheat, so after the medicine, whether it is wheat or oat, the grass will be poisoned, the difference is the additive added in the agent, can Detoxify wheat. If there is a heavy spray or a leaking spray or an increased dose, it will make the wheat not detoxify properly. This is not only the removal of the wheat, but also the phytotoxicity of the wheat.
The above is a variety of introductions on wheat weeds. For wheat growers, the yield of wheat is related to their own economic benefits, and weeds, as a pest in the field, can rob wheat of its growth and nutrition, resulting in reduced wheat production, etc. Everyone should pay attention.
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