Plant Parasites of Europe

leafminers, galls and fungi

Tilia

Tilia lime

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

Dichotomous table for leafminers

1a blotch mine, from which eventually an excision is made that is hardly smaller than the mine itself => 2

1b lower surface tentiform mine => 3

1c blotch mine (no excision) => 4

1d corridor mine => 6

1e fleck mine => 8

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

2a larva: each thorax segment with a black dorsal shield: Incurvaria koerneriella or pectinea

2b onlt pronutum with a black shield; meso- and metanotum with a small dark spot: Incurvaria masculella

3a frass in a lump in one corner of the mine: Phyllonorycter issikii

3b frass scattered in the mine: Phyllonorycter messaniella

4a on the oviposition spot (usually the leaf tip) a shining black drop of dried secretion: Trachys minutus

4b no such drop => 5

5a mines in May, mostly in the canopy; mines flat, not rolled in at the margin; rarely more than 1 mine per leaf; frass pellets about 0.5 mm long: Parna apicalis

5b mines in June-July, mainly on suckers; mine somewhat inflated, rolled in at the margin; often several mines per leaf; frass pellets up to 2 mm long: Parna tenella

6a a contorted gallery of about 2 cm; larva remains in the mine until just before pupation: Stigmella tiliae

6b mine < 1 cm; older larvae live free => 7

7a mine at the leaf margin (generally in the tip of the leaf): Roeslerstammia erxlebella

7b hooklike mine in a vein axil: Bucculatrix thoracella

8a lobe case: Coleophora violacea

8b tubular leaf case: Coleophora siccifolia

8c pistol case: Coleophora anatipenella

Not included in the key: Bucculatrix albedinella; Coleophora ahenella.

Tables for all parasites per species

Last modified 21.ii.2020