Cactus long spot how to do

Remove the black spots and rotten parts on the meat ball

After black spots appear on the cactus, first observe whether its meat and roots rot. In case of decay, the rotten meat balls and rotten roots shall be removed in time, and the cut cactus shall be re inserted into the soil

Replace the soil in the cactus

The reason for the long spot may be that the original soil contains virus, which is not suitable for the continuous cultivation of cactus. Therefore, it is necessary to mix fine sand, mud and slightly corrosive soil to re prepare the soil. You can also add a little gravel or tree leaves to facilitate the drainage of cactus

Rational fertilization

Cactus does not need too rich fertilizer, but can maintain medium fertility. Phosphorus and potassium fertilizer can be used to increase the fertility of soil. However, the number and amount of fertilization should be controlled

Pay attention to watering

When watering, you can't drop water on the meat balls and thorns on the surface of the cactus, which is easy to infect the virus. Water once every 15 days or so

Sterilization

There will be a wound on the surface of the cactus with black spots removed. Drying it in the sun and sprinkling a layer of charcoal powder on it can make the wound heal as soon as possible. Then, apply the medical dakning ointment around the disease spot of cactus and sprinkle a little potassium permanganate on the soil< span>