Juniperus juniper

Dichotomous table for leafminers

1a tiny fleck mine; older larvae live free in spinning and don’t mine any more: Archips oporana

1b larger blotch or corridor mine => 2

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

2a older larvae live free in a common web: Dichomeris marginella

2b larvae mine all their life => 3

3a mine with 1 or two holes (may be closed with silk) => 3

3b mine without holes => 4

4a larvae in March-April; prothoracal shield black with olive-brown centre; abdomen green, last segment reddish: Argyresthia aurulentella

4b larvae in half June-end March; prothoracal shield entirely black; abdomen green throughout: Argyresthia trifasciata

5a larva: prothoracic plate grey, spotted with black: Argyresthia abdominalis

5b prothoracic plate brown: Argyresthia dilectella

5c prothoracic plate not differentiated, green like the rest of the : Argyresthia cupressella

Not included in they key: Aethes rutilana; Argyresthia reticulata; Chionodes electella; Ocnerostoma friesei.

mod 31.xii.2017