Diatomaceous Earth (Food Grade) is best used as a preventive. Some horticultural oils work on scale parasites, and so neem oil might help in this case.
There are no pictures of the developing or developed buds on this plant, but I can’t imagine they’d be very big nor very good for smoking, and so I’d have to agree with @Aquaponic_Dumme, that it is probably best to throw it out and sanitize the entire growing area very well, and maybe start over.
Happy growing,
MacG