With more and more kinds of herbicides, weed classification has become more and more clear. We have used herbicides to produce mixed products. We have also paid attention to the efficient and safe application of herbicides. The following four points are summarized:

     1. Herbicides must be mixed to kill different grasses.

     2, mixed herbicide, the use of the appropriate period and method must be the same.

     3. After the herbicides are mixed, no precipitation or delamination can occur.

     4. After the herbicides are mixed, their amount is 1/3-1/2 of a single amount.