It all depends on what type of succulent you choose. Cuttings or individual leaves are more effective. Although ladybugs and the other pests won't affect the adult scale infestation, you can be certain that they will prevent the babies from getting bigger. As with most succulents, it is best to water the plant in the morning before the sun sets. If your plant's leaves fall, become shriveled, develop brown spots or turn yellow, this is a sign it needs more water. A: You should take out any plant with rotten root systems.