With the gradual completion of wheat planting, the problem of weeding has entered the line of concern of the growers. Weeding is divided into pre-emergence closed weeding and post-emergence stem and leaf weeding. This article mainly introduces wheat pre-sealing herbicides. Some knowledge. I hope to help the majority of wheat growers!
Reasons for the use of closed herbicides before seedlings
Before the analysis, Xiaobian first asked everyone to ask a question, that is, friends who planted winter wheat in previous years. Have you used herbicides before the seedlings? This answer is a little bit known, because most of the growers’ friends, when planting wheat. There is no use of pre-emergence herbicides for 3 reasons:
1, for many years, rarely closed before the seedlings, did not develop habits, are using post-emergence herbicides.
2, there is no suitable agent, the closed herbicide on the market, for wheat, not much, and it is easy to produce phytotoxicity.
3, high cost, originally planted an acre of wheat, after the cost, the profit is not large, on the basis of the post-emergence herbicide can be solved, will not spend more money to use the pre-emergence herbicide.
Pre-emergence herbicide effective formula
Seeing this, some friends will say, I just want to try to stop the herbicide before the seedlings, see how the effect, is there a suitable formula?
At present, there are not many herbicide-sealing herbicides used in wheat fields. Some herbicides commonly used in other crops, such as acetochlor, can prevent some wheatgrass, but wheat is more sensitive to acetochlor. It is easy to produce phytotoxicity. Some farmers will use acetochlor to seal it. It is necessary to pay attention to the dosage and it will not be used. It is not recommended.
In addition, like isoproturon, bensulfuron-methyl and thifensulfuron, these agents can be used as both a closed herbicide and a post-emergence stem and leaf treatment. Isoproterenol and acetochlor are similar, mainly for prevention and treatment. Coniferous grass, while bensulfuron-methyl and thifensulfuron are mainly used to control broad-leaved grasses. The above agents have certain effects after being used as a closed herbicide, but it is necessary to pay attention to the dosage to ensure a week or so, no rain and cool weather. Otherwise, it is also easy to produce phytotoxicity.
In addition to the above single agents, there are some other compounding agents, some of which are foreign products, such as flufenacetate + furoserone + flufenacetamide or isoproturon + propionamide + chlorpyrifos Long, etc., the effect of these drugs is not good or bad (depending on the temperature, humidity, climate and other factors at the time), the cost can not be accepted is a big problem, Xiaobian has not used the product, do not know the specific price is How much is an acre, but according to the market, it will not be cheap.
To sum up, wheat herbicides are closed before the seedlings. At present, there are not many users. Everyone still uses post-emergence herbicides. If you really want to use a closed herbicide, you should pay attention to the dosage, temperature, precipitation, etc. after purchasing the above agents. Don't spend money and then cause phytotoxicity to appear, it will not be worth the loss.
Regarding the understanding of wheat-blocked herbicides, Xiaobian says so much. What else do you want to say about wheat herbicides? Welcome to share the message!
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