Plant Parasites of Europe

leafminers, galls and fungi

Pisum

Pisum garden pea

(For a dichotomous table for galls on Pisum by Hans Roskam click here)

Dichotomous table for leafminers

Mines can occur also in the petioles and even in the tendrils. These can be identified only by a study of the larvae or by breeding.

1a corridor, widening into a large blotch => 2

1b a corridor from begin to end => 3

1c galls, etc => Tables for all parasites per species

2a frass powdery, in black-green clouds along the margins of the blotch or in the end of short side branches: Scaptomyza flava

2b frass in large, widely separated black lumps: Agromyza lathyri

3a puparium in the mine, in a, usually under-surface, pupal chamber: Chromatomyia horticola

3b before pupation the mine is left through a semicircular exit slit => 4

4a frass in a broad, central green band; larva: rear spiraculum with 3 papillae: Liriomyza congesta

4b frass in black thread fragments, never in a green band; rear spiraculum with > 3 papillae => 5

5a corridor pinnately branched, main branch overlying the midrib: Liriomyza strigata

5b corridor not pinnate => 6

6a corridor usually beginning upper-surface, but further on turning lower-surface; most mines in the basal half of the leaf; corridor often follows the midrib for some stretch: Liriomyza huidobrensis

6b corridor beginning lower-surface, often remaining so till the end; mines in the entire leaf, without a tendency to follow the midrib: Liriomyza pisivora

Not included in the key: Amauromyza chamaebalani; Liriomyza bryoniae, trifolii.

Tables for all parasites per species

Last modified 10.iv.2020