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Liriomyza cannabis Hendel, 1931
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spiral at the start of the mine

Food Plant: Cannabis sativa (Cannabis)

Mine: Two generations (Hering, 1957). The mines above were found in June.

Notes: The mine starts with a spiral and then becomes more or less straight, mining the upper leaf surface. Frass strings are also evident. The mine looks very similar to L.eupatorii, but in the latter the initial spiral is larger. Future DNA analysis may synonomise these species. This species was first notified to the Plant Health and Seed Inspectorate (APHA) in June 2016 although it seemed to have been present under glass, at secure sites under Home Office license, for 18 months.

Data: vi.2016, photographed David Crossley

Image:©Fera-Science Limited

Recording Grade: 5

Collins et al (2016) - The first occurence of Liriomyza cannabis Hendel (Diptera, Agromyzidae) in Great Britain, Dipterist's Digest, 23,163-167
Hering, M (1957) - Bestimmungstabellen der Blattminen von Europa.
Spencer, K A (1976) - The Agromyzidae of Fennoscandia and Denmark.

sponsored by Colin Plant Associates (UK) LLP/Consultant Entomologists