The leaf and stem mines of British flies and other insects
 

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds

Join us on Facebook

TAGETES. Marigolds. [Asteraceae]


Seven species of Tagetes are recorded in Britain. All are introduced and include French Marigold (T. patula). French marigold is native to Mexico and Nicaragua. In addition, it has been cultivated in continental Europe and the United States for its flowers and medicinal properties.

Only one British miner is recorded on Tagetes.

French Marigold - Tagetes patula. Image: © Brian Pitkin
French Marigold
Tagetes patula



Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Tagetes


1 > Leaf-miner: A distinctive mine primarily above mid-rib, with irregular short lateral offshoots into leaf blade. Pupation external (Spencer, 1972: 51 (fig. 172), 55; Spencer, 1976: 270, 271 (fig. 486)).

Branched, whitish, upper-surface corridor; main axis overlying the midrib; side branches overlying the main lateral veins. (In Campanula and Phyteuma the mine is much less branched, sometimes nothing more than a corridor on top of the midrib). Frass in rather long strings. Usually the mines begins as a long and narrow, shallow, tortuous lower-surface corridor that ends upon the midrib but otherwise is not associated with the leaf venation. Often this initial corridor is filled with callus, and then even less conspicuous. Pupation outside the mine (Bladmineerders van Europa).

A linear mine on the upper surface, usually following the midrib and showing side branches along the veins. The frass is in strings (British leafminers).

Polyphagous. On more than 40 host genera in 15 families, but not yet on Tagetes, in Britain,. Widespread throughout Britain. Also recorded in the Republic of Ireland. Widespread in continental Europe.

Liriomyza strigata (Meigen, 1830) [Diptera: Agromyzidae].



XHTML Validator Last updated 24-Jan-2016  Brian Pitkin Top of page