Amauromyza morionella

(Zetterstedt, 1848)

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Hosts in Great Britain & Ireland : Ajuga, Ballota, Glechoma, Lamium, Marrubium and Stachys.

Mine : The mine is initially a long, linear, upper-surface corrdior which then develops into a large whitish blotch after the larva has gone through its first moult. The blotch often envelopes the early part of the mine.

Frass in the corridor section of the mine is placed at alternate sides of the mine, in short, angular fragments (see below). No feeding lines are present.

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Pupation : Outside of the mine.

Puparium : Orange.

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Phenology : Mines can be found between April and October.