In the process of planting corn, in order to effectively ensure the growth of corn, it is necessary to prevent and control the weeds in the field. However, some people use corn herbicides and find that after using herbicides, the weeds die very thoroughly. However, if the weeds are not dead after use, there will be phytotoxicity. What is the reason? Let's take a look at the following.
1, buy a fake herbicide
There are many herbicides on the market, and there are many herbicides sold. The quality is uneven. If you buy fake and inferior herbicides, the weeding effect will definitely not be good. The reason may be that you have purchased the products. Herbicide, quality is not guaranteed.
2, the purchase of expired herbicides
Some herbicides have expired, but business opportunities are still on sale, so the use of such herbicides is not effective and the weeding effect is naturally not good. Or some farmers have accumulated herbicides, and they have not used up in 2 years. If they are still in use in the third year, problems may arise. Or some merchants with irregular legal interests, date modification of expired herbicides, farmers' friends did not know, bought expired herbicides.
3, the spray weather is not correct
The weather has a very important relationship with the efficacy of herbicides. Some farmers are free to spray herbicides in a hurry or for other reasons, which may affect the efficacy of the herb. On the other hand, there may be phytotoxicity. It is not allowed to apply in windy weather. The liquid will drift and cause phytotoxicity. When the field is relatively dry, the herbicidal effect will be greatly reduced. When the hot weather is applied at noon, the liquid evaporates too quickly, which will also affect the weeding effect.
4, miss the best spraying period
When weeding corn, there is a suitable period for spraying herbicides. Premature or late will affect the weeding effect. The herbicide is closed, and it must be sprayed after the corn is planted, and it has not been sprayed before emergence. If it is sprayed too late, it is easy to cause phytotoxicity. The best period for post-emergence herbicides is to spray during the 3-5 leaf period of the corn. If the farmers spray prematurely, the herbicidal effect will not be good.
5, the method of fight drugs is wrong
When the herbicide is not the right method, it will also lead to poor weeding effect or phytotoxicity. When the herbicide is sprayed, there is no uniform mixing, which causes a different concentration in the barrel. When the concentration is too large, there may be phytotoxicity. When the concentration is too low, the herbicidal effect is not good. When the medicine is used, the technique is not closed, and the stop and stop, together with repeated spraying at the edge of the ground, cause phytotoxicity. The use of unclean water will also affect the efficacy of the drug, and there will be a phenomenon of blocking the nozzle.
In short, when we use herbicides, we must pay attention to all aspects. In fact, unless the herbicides are inherently problematic, they must be sprayed according to the method described, and the ideal herbicidal effect can be achieved.
For the wonderful pictures and popular comments on the use of corn herbicides, you may be interested in the following recommended contents of Hui Nong. Welcome to read.
https://youtu.be/J8_kGr1UL8M?si=Pxf_zLd5PUFyrFmc
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