Plant Protection Knowledge | How much is corn weeding?
In recent years, it has become more and more common to use herbicides on corn fields. However, many flyers have asked that the same herbicides have a good effect on one field, and the other has a bad effect. What is the reason? What?
In fact, the reason for this phenomenon, in addition to the quality difference of the herbicide product itself, is mainly affected by many other external factors. Specifically, there are several factors:
1. Herbicide spray is too late
At present, the herbicides used by everyone are generally applied in the 2-5 leaf stage of corn and the 2-3 leaf stage of weeds. The time of administration is too late, resulting in excessive grass age, insufficient medication, and serious adverse effects.
2, the field is not enough humidity
When the herbicide is sprayed on the corn, the humidity in the field is not enough, and the moisture in the liquid contact with the surface immediately evaporates, so that the liquid cannot form a film on the surface, which causes the drug to not function properly and has a poor effect.
3, the water consumption is too small, the film coverage is uneven
There are many users, the amount of water is too small, generally requires that the water consumption per mu must be strictly in accordance with the regulations of the S&P Pharmacy Department, and cannot be decided without authorization.
4, the difference in application time
Part of the flying hand, in order not to delay the work, spray at the midday lunch break, the liquid evaporates quickly, affecting the effect.
5, wheat is too high
The straw is not cleaned and the liquid is sprayed onto the soil layer.
6, soil reasons
Sandy soil, saline-alkali land and over-fired ground (the grass ash is alkaline) have a certain effect on the weeding effect.
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For the above reasons, we recommend that when applying herbicides,
Maintain proper humidity in the field and remove excess wheat straw from the wheat field.
According to the appropriate adjustment or reduction of the amount of soil, choose the corn 2-5 leaf stage, weed 2-3 leaf stage,
Spraying in the morning or evening when the soil surface humidity is high, forming a film to improve the herbicidal effect.
The reverse type is used during the spraying process to ensure that the herbicide can be used normally.
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