What manufacturers should pay attention to when using herbicides

What manufacturers should pay attention to when using herbicides

Each herbicide has a certain herbicidal spectrum, which is biocidal and selective. Therefore, effective herbicides should be selected according to the type of crops and the main varieties of weeds. At the same time, the herbicide should be selected according to the farming system. In addition, pay attention to mixing and alternating herbicides. Because the same herbicide is used continuously for many years, it is easy to lead to the gradual reduction of sensitive weeds and the increase of resistant weeds. Therefore, herbicides should be used in combination and alternately between years to achieve the purpose of long-term weed control.

It is necessary to wait until the weeds grow for a certain period of time before starting to use the herbicide manufacturer's medicine. 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 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 resistance will increase and the amount needs to be increased. In general, weeds are best used when they are at the 2-4 leaf stage.

The herbicide manufacturer proposes to look at the moisture in the ground. When the moisture in the ground is not good, and the weather is relatively dry, try not to use pesticides. Why? The ground is dry and the weeds are short of water. In order to keep the water, the pores will be closed. In this case, the liquid medicine will not absorb much, resulting in the general effect of the medicine, and the weeds will not die. Soil treatment involves spraying herbicides directly on the soil surface to kill newly emerged weeds. For example, doer and acetochlor should be applied before the weeds emerge after the crops are sown. After the weeds emerge, the effect will not only be poor, but some will also damage the crops. Therefore, it is very important to choose the time of application of herbicides.