Other hosts (Mussel scale)

Mussel scale

• Occurs on many other woody host plants. Fruit crop hosts include apple, pear, cherry, plum, bilberry and less frequently currant and gooseberry.
• Other hosts include blackthorn, cotoneaster, hawthorn, heath, heather and many others.
• Populations on hawthorn, heather and other wild plants are believed to be the main sources of infestation of orchards.

Other scale insects

• In the UK, oyster scale occurs on apple, apricot, birch, cherry, currant, nectarine, peach, pear and plum. Birch is considered to be the original host.
• Pear scale occurs on apple, peach, pear and poplar.
• Nut scale occurs on apple, pear and plum.