We must pay attention to the method of wholesale herbicide application
Although weeds and crops belong to higher plants, they are different in shape and structure. For example, common weeds have broad leaves, pointed leaves and sedges, while crops also have pointed leaves and broad leaves. For example For example, wheat belongs to pointed leaves, and Artemisia somnifera, pig calamity, and mother-in-law belong to broad-leaved grasses.
Many friends will apply the closed herbicide in time after the corn is sown. When the liquid is applied, a layer of medicinal film will be formed on the soil. In general, the weeds emerge earlier than the corn, and the weeds will absorb the closed weeding at this time. The liquid of the agent will lead to death, and the corn will grow late under the protection of the covering soil, which is the principle of the potential difference.
It is to wait until the weeds grow for a certain period of time before starting the drug. If the weeds are small, the area of the weeds contacting the liquid will become smaller, which is not conducive to the death of the weeds. The most obvious situation is the rebound or the effect is not good. However, the weeds should not be too large. If the weeds are too large, the wholesale resistance of herbicides will increase, and the dosage needs to be increased.
If the weeds are too thin, most of the liquid medicine will hit the ground, and then volatilize. After a few days, the weeds will slowly grow, which means that the medicine applied a few days ago has no effect at all, and it has to be reapplied. Wait until the weeds are almost out, and then remove the herbs and apply medicines when they are a little dense. The dense here is not big, remember to distinguish them.
