How to treat the scale insects of plum trees in winter

Scale insects on plum trees. Spraying buprofezin or buprofezin or phenoxy or acetamiprid or veratrine or matrine on the leaves can kill the scale insects as long as it is sprayed on them. When controlling scale insects, we must be careful not to use highly toxic methidathion (rapid culling) to avoid polluting the environment and endangering human health.