It's thought that older, more established plants can tolerate light infestations. Regularly tending to plants and practising good housekeeping in the garden will give plants a better chance at survival.
Infested branches may be pruned and removed and disposed of sensibly. Tools used should always be sterilised after.
Lighter infestations may be rubbed or picked off with hands.
Alcohol-soaked cotton and neem-based leaf shine may be rubbed over the surfaces of the areas infested.
Capturing natural enemies and releasing them on the affected area may improve infestations. These include insects like ladybirds, hoverflies, lacewing and earwigs. Likewise, by letting parts of the garden 'grow wild' paired with an abundance of pollinator-friendly plants, you can attract the latter into your garden.
Insecticidal soaps can be advantageous if applied regularly over several intervals.
Horticultural oils may be used as the next alternative. They are oil-based and environmentally benign, and these will give some coverage over adult stages.
Before application, ensure the plant is well hydrated and not in direct sunlight. If so, it might be worth applying oils in the evenings when cooler. Test some oil before applying it to the whole plant.
Once applying the primary treatment, continue to spot-treat the scale until they are no more!
Please follow treatment instructions carefully, and consult with your garden centre if you're still not confident.