There treated just like aphids! Spray when there young. They are usually super tiny when there babies. Look like little brown aphids when there small. There horribly, related to the mealy bug. Also they come from outdoors mainly on infected plants media clothes ect.
One preventive that has worked to at least partially repel scale mealybugs, spider mites, and other sucking pests is to root feed and foliar spray Rhino Skin, a potassium silicate formula, at 200 ppm and with a pH of 5.7 for both root feeding and foliar spraying.
They’re often called “armored scales” because many varieties of these pernicious pests armor themselves with a gooey but hard plate that covers the real insect underneath.
Because of their armor, they’re virtually impossible to eliminate with pesticide sprays, horticultural soaps, and other spray methods.
For example, if you want to suffocate them with horticultural soap, or penetrate them with a natural pesticide, you have to spray so much on them that you also suffocate your cannabis plants.
Systemic pesticides don’t work well with scale mealybugs, and can make your crops unfit for human consumption.
Some growers try to brush them with isopropyl alcohol. This does dissolve their bodies, but it also harms marijuana plants.