Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
Phormium mealybug unlike 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 winters out of doors, unlike most mealybugs found in Britain which are dependent on glasshouse conditions. Mealybugs suck sap from plants and then excrete the excess sugars as a substance called 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 very 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 the 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.
MealybugsGolden root mealybugSooty moulds
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.
Register for the site or sign in to share your experiences on this topic and seek advice from our community of gardeners.
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.
Join the RHS today and get 12 months for the price of 9