If it's a scale insect, you can mix liquor and water in the proportion of 1:2, and then pour it on the basin soil. This kind of insect generally moves most frequently when the room temperature is 7 degrees in spring, so it can be watered once in April, and then every other time in the first half of a month, four times in a row, you can see the effect.
To prevent and control this kind of insect, you can dip a small cotton ball in vinegar and smear it on the damaged stems and leaves, which will kill the insect. This method is not only safe and convenient, but also can play the role of insect control, so that the injured leaves can restore luster as soon as possible.
It can be effectively removed by repeatedly wiping the diseased part with alcohol, and the treatment is also very clean. Even the scale insects that can't be found by naked eyes will all be destroyed and will not recur in the next year.

If it is spider, need to spray with special medicine directly to prevent and cure, spray as many times as possible when spraying, otherwise it will not have the effect of prevention and cure.

If there are two kinds of insects, it will be better to catch them by hand.

In order to prevent insects from appearing again, we need to do a good job of maintenance at ordinary times. For example, when the temperature is high, we need to reduce watering, because insects are most likely to occur in high temperature and humidity. Then put it in the light weak place to raise 2 to 4 weeks later, then move back to the light line strong place to raise.