HOME : Introduction : Methods : Miners : Parasitoids Host plants by Scientific name : Common name References : Web resources : Acknowledgements : Recent changes : Index : Search

TRIGONELLA. Fenugreeks. [Fabaceae]

Twenty-one species of Trigonella are recorded in Britain. All are introduced and include Blue Fenugreek (T. caerulea), Sickle-fruited Fenugreek (T. corniculata), Fenugreek (T. foenum-graecum), Egyptian Fenugreek (T. hamosa) and Star-fruited Fenugreek (T. monspeliaca). Only one dipterous miner, the polyphagous drosophilid Scaptomyza graminum, is recorded on Trigonella in Britain. The agromyzid Liriomyza trifolii, a pest species of ornamental and vegetable crops occasionally intercepted at UK points of entry, is recorded on Trigonella. The species has been found under glass in England and Wales. All populations have been and continue to be eradicated. Elsewhere the agromyzids Agromyza nana, Liriomyza bryoniae, Liriomyza congesta, Liriomyza strigata and Liriomyza trifolii are recorded mining Trigonella. No non-dipterous miners are recorded on Trigonella in Britain.

Key for the identification of the known Diptera mines in Britain.

1> Corridor-blotch mine. Mine begins as a normally upper surface deep corridor and becomes a blotch lying centrally in the leaf, often touching the leaf petiole, if leaves are small larva may mine across the stem to another leaf. Frass partly in grains or streaks but mainly in clumps towards margins of blotch. Pupation internal or external, sometimes in a separate pupation mine. Scaptomyza graminum (Fallén) [Drosophilidae].

Last updated 28-Aug-2007  Brian Pitkin

.