Agrotis segetum, sometimes known as the turnip moth, is a moth of the family Noctuidae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It is a common European species and it is found in Africa and across Eurasia except for the northernmost parts.
It is a cutworm in the genus Agrotis, which possibly is the genus that includes the largest number of species of cutworms.
It is usually known as the common cutworm in English. It is sometimes called the turnip moth in the United Kingdom.
It is possible it has been spread by the international trade in nursery stock.
In the British Isles, two broods are produced each year, the adults flying in May and June and again in August and September. It is known to migrate some distances. The species is nocturnal and is attracted to light and nectar-rich flowers. The species overwinters as a caterpillar.
Agrotis segetum is one of the most important species of noctuid moths whose larvae are called cutworms. The larvae are generally grey, sometimes tinged with purple. They attack the roots and lower stems of a huge range of plants (see list below) and can be a particularly serious pest of root vegetables and cereals. Attacking the lower stems often results in cutting down seedlings, which is why this species is classed as a cutworm.
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