Join the RHS today and support our charitable work
Keep track of your plants with reminders & care tips – all to help you grow successfully
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Free entry to RHS members at selected times »
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Help us achieve our goals
Join the RHS today and support our charity
Phormium mealybug unlike the glasshouse mealybugs, only affects New Zealand flax and can survive out of doors throughout the year.
Like the host plant, phormium mealybug originates from New Zealand and is able to survive British winters out of doors. Most other mealybugs found in Britain which are dependent on glasshouse conditions. Mealybugs suck sap from plants and excrete the excess sugars as honeydew. This lands on the leaves and stems were it is often colonised by sooty moulds, giving the surfaces a blackened appearance.
Phormium mealybug is specific to Phormium and can prove damaging, particularly on young plants. The insects tend to cluster around the base of the leaves and heavy infestations cause plants to lack vigour and the foliage may die prematurely. Older established plants seem to be more tolerant of this insect and will often survive without much obvious damage.
This is a very difficult insect to control as the mealybugs are concealed at the base of leaves or where leaf margins are folded together. This makes it very difficult to reach them with a pesticide and none of the products currently available to home gardeners is likely to give effective control.
Golden root mealybug
the RHS today and get 12 months for the price of 9
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.