It's thought that older, more established plants can tolerate lighter infestations. Regularly tending to plants and practising good housekeeping in the garden will give plants a better chance at survival.
Monitor your plants regularly, making sure to check the branches, stems and midribs of leaves for fluffy white insects and honeydew.
Badly infested branches can be pruned and removed and disposed of sensibly.
Lighter infestations may be rubbed or picked off with hands or gloves.
Alcohol-soaked cotton and neem-based leaf shine may be rubbed over the surfaces of the areas infested, if small!
Horticultural oils, such as neem, may be used as the next alternative.
If ants are also present at the site, they may be providing some protection to the scale. Ants can be controlled using a product such as Tanglefoot Pest Barrier.
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 indigenous plants can attract the latter into your garden.
Organic sprays, such as fatty acids and pyrethrums are less persistent than other pesticides, so they may require several applications. Always read instructions and make sure the edible crop is listed on the bottle for eating.