How kill scale insect killing cactus?

Scale insects can harm cacti by feeding on their sap, which weakens the plant and can lead to stunted growth or even death. To control scale infestations, you can manually remove them with a soft brush or cloth, or use insecticidal soaps and horticultural oils that suffocate the insects. Regular monitoring and maintaining proper care conditions, such as avoiding overwatering, can also help prevent infestations.