The mechanism of weed death caused by herbicides disturbing or destroying the normal physiological metabolism of weeds is relatively complex. Most herbicides are not limited to one weed killing effect, but often the result of several joint effects.

These functions of herbicides are mainly as follows: first, to inhibit photosynthesis, weeds can't produce new nutrients, and they will die of starvation after consuming the stored nutrients; second, to destroy the respiration, inhibit the electronic transfer and energy transfer in the process of respiration, so that the respiration becomes useless consumption, and weeds can't enter various physiological and biochemical processes in the body due to lack of energy The third is to interfere with the role of weed hormones, break the balance of the original weed hormones, disrupt the growth and development of weeds, resulting in distorted weeds. At the same time, because it interferes with the normal physiological metabolism process of weeds, it produces a series of metabolic disorder symptoms, which will cause the whole plant to die when it is serious; fourthly, it interferes with the synthesis of nucleic acid metabolism and protein, the synthesis of enzyme is blocked, the cells cannot divide normally, the growth, development and Metabolism Activities of weeds change, the growth stagnates, the weeds are deformed, and finally die.