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Sticker of Black cutworm
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Black cutworm

Agrotis ipsilon
Name means: “ipsilon comes from the Y-shaped black marks on its front wings, like the Greek letter upsilon”
Eats: Nectar and pollenMothsGardens and meadows6 legs

The black cutworm is a brown moth with a little black Y mark on each front wing. Its fat grey caterpillar hides in the soil by day and comes out to cut through young plants. That is how it got the name cutworm.

Lives in
Almost all over the world, in fields and gardens
Wingspan
3.8 to 4.8 cm (1.5 to 1.9 in)
Top speed
about 15 km/h (9.3 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless to people. It is a big problem for farmers and gardeners, though.
What does it eat?
The moths drink flower nectar. The caterpillars eat weeds first and then almost any vegetable, plus crops like cotton, rice and strawberries.
For real!Photo of Black cutworm
Picture by Caroline Harding, MAF. CC BY 3.0 au, via Wikimedia Commons.

How big is it?

How wide are its wings?

Black cutworm wings about 4.8 cm tip to tip (1.9 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
wings as wide as 1.5 toy building brickscould fly across a whole football pitch in 25 seconds

How big is Black cutworm compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Its caterpillar grows from 3.5 millimetres to 5.5 centimetres long.

2

In spring it flies north and in autumn it flies south, like a migrating bird.

3

A mother can lay well over a thousand eggs.

4

Its round eggs have 35 to 40 little ridges, like a tiny striped ball.

5

From egg to moth takes only about one to two months.

you asked

Most asked questions about Black cutworm

?Why is it called a cutworm?

Because its caterpillar cuts through young plants near the ground.

?Is the black cutworm dangerous?

Not to people. But its caterpillars eat many vegetables and crops.

?What does the black cutworm eat?

The caterpillars eat weeds, vegetables and crops. The moths drink nectar.

For bug experts

Scientific name
Agrotis ipsilon
Group
Moths
Family
Noctuidae
Classification
Insecta > Lepidoptera > Noctuidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania
Also known as
Dark sword-grass, Ipsilon dart, Greasy cutworm, Floodplain cutworm

Where the facts come from

  1. Agrotis ipsilon (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 Caroline Harding, MAF. CC BY 3.0 au, 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: Moths

Also at home here: Gardens and meadows