Lotus birdsfoot-trefoil

Dichotomous table for leafminers

Incl. Tetragonolobus.

1a blotch, without initial corridor => 2

1b corridor from start to end => 4

1c corridor that suddenly widens into a clear blotch => 6

1d fleck mine => 9

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

2a blotch large, containing abundant frass; larva in the mine until close to pupation: Leucoptera lotella

2b blotch generally small with little or no frass; after a short time the larvae start living between spun leaves => 3

3a larva slate grey, anteriorly a white dorsal line: Aproaerema anthyllidella

3b larva yellow with red transverse bands: Syncopacma taeniolella

4a corridor full depth; frass in a central line: Coleophora discordella (beginmijn)

4b corridor upper- or lower-surface; frass different => 5

5a frass in a broad green central band, minute black grains at either side: Liriomyza congesta

5b frass in isolated black grains, no green central band: Chromatomyia horticicola

6a larva a maggot; mine hook-shaped, blotch part situated over the midrib: Agromyza nana

6b larva with chitinised head; mine not hook-shaped, posititioned differently => 7

7a blotch at the leaf margin; there also is the beginning; no egg shell where the mine begins: Coleophora discordella (initial mine)

7b blotch begins near the leaf basis, from there expanding over the leaflet; at the begin a small egg shell => 8

8a pupa usually in the mine; larva: thorax dorsally with at either side 10, 10 and 8 setae, resp.: Trifurcula eurema

8b pupation outside the mine; larva: thorax dorsally with at either side 13, 11 en 9 setae, resp.: Trifurcula cryptella

9a larva free, not in a case or tube: Polyommatus icarus

9b larva in a transportable case => 10

9c larva in a silken tube, into which it withdraws during feeding pauses => 11

10a case helicoidal; hole in the mine not precisely round: Apterona helicoidella

10b case tubular; hole precisely round: Coleophora discordella

11a larva greyish-green with whitish length lines: Scythris picaepennis

11b larva dark purple with whitish transverse bands: Scythris siccella

Not included in the key: Apterona helicinella; Cnephasia; Coleophora acrisella (occurrence on this plant needs confirmation), colutella, festivella, loti, spumosella, squamella; Phyllonorycter nigrescentella;Trifurcula manygoza, ridiculosa.

mod 9.x.2017