Mix up a solution of 1 part pure hydrogen peroxide (with no additives) to 4-5 parts water. Mix well and water the plant, making sure to thoroughly drench all parts of the soil. The hydrogen peroxide will fizz; that’s what kills the larvae and the eggs. Repeat in 2 weeks for a larger pot; in 7-10 days for a small pot.
Besides, can mealybugs be in the soil?
These small insect pests are found around the world but found more often in places with warmer environments. Soil mealybugs enjoy living in the root ball and potting soil while feeding in moist, warm climates and are found of: Succulent Plants – many types. African Violets.