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Sticker of Cottony cushion scale
Bug card No. 0368 of 1,500

Cottony cushion scale

Icerya purchasi
Name means: “named after the Reverend Dr. Purchas, who was believed to be the first to find it”
Eats: PlantsTrue bugs and cicadasGardens and meadows6 legs

The cottony cushion scale is a small reddish brown bug that sits on twigs and branches. On its back it grows a big white, fluffy, ribbed bag that looks like a little cotton pillow. That bag is full of tiny red eggs.

Lives in
First from Australia, now everywhere in the world where oranges and lemons are grown
Length
5 mm (0.2 in)
Top speed
about 0.02 km/h (0.01 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It is a pest for fruit trees.
What does it eat?
It sucks sap from twigs and leaves of more than 80 families of woody plants, most of all orange and lemon trees.
For real!Photo of Cottony cushion scale
Picture by unknown author. Public domain, via Wikimedia Commons.

How big is it?

How long is it?

Cottony cushion scale about 5 mm long (0.2 in)A grain of rice about 6 mm (0.24 in)
small enough to sit on your fingernailneeds 3 minutes to cross a dinner table

How big is Cottony cushion scale compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

The white egg bag grows two to three times longer than the bug itself and holds hundreds of red eggs.

2

The babies spread by crawling and by blowing away in the wind.

3

Many scale insects lose their legs as they grow up, but this one keeps its legs all its life.

4

In 1888 a ladybird was brought from Australia to California to eat it. The ladybird saved the orange farms there.

5

Almost all of them are both mother and father at once. Real males are rare.

you asked

Most asked questions about Cottony cushion scale

?What is the white fluffy thing on my lemon tree?

It may be a cottony cushion scale. The white fluff is its egg bag, full of tiny red eggs.

?What does the cottony cushion scale eat?

It sucks sap from many woody plants, especially citrus trees like oranges and lemons.

?How do you get rid of cottony cushion scale?

Nature helps. A ladybird called the vedalia beetle eats it, and that worked very well in California.

For bug experts

Scientific name
Icerya purchasi
Named by
Maskell, 1878
Group
True bugs and cicadas
Family
Monophlebidae
Classification
Insecta > Hemiptera > Monophlebidae
Lives on
Australia and Oceania, North America, South America, Europe, Africa, Asia

Where the facts come from

  1. Icerya purchasi (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by unknown author. Public domain, Wikimedia Commons. The round sticker of this bug is cut from the same picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

More from the same group: True bugs and cicadas

Also at home here: Gardens and meadows