Bupleurum hare’s-ear, thorow-wax

Dichotomous table for leafminers

1a larva with thoracic feet and a recognisable head => 2

1b larva a maggot => 4

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

2a short (c. 5 mm) corridor without frass: Agonopterix fruticosella

2b corridor much longer, with a clear frass line => 3

3a on Bupleurum fruticescens: Trifurcula sanctibenedicti

3b on Bupleurum fruticosum, rigidum: Trifurcula bupleurella

4a large blotch mine, sometimes with a short and broad initial corridor; primary and secondary feeding lines conspicuous; larva: rear spiracula with 3 papillae: Euleia heraclei

4b initial corridor much longer; at most primary feeding lines may be visible vaguely; rear spiracula with >3 papillae => 5

5a corridor very long and narrow, hardly widening towards the end; frass in an almost continuous central line: Phytomyza facialis

5b corrridor widening fast and strongly; frass in granules or strings along the corridor sides => 6

6a larvae in April-May; mine starts with a short lower-surface stretch: Phytomyza bupleuri

6b larvae in July and September-October; mine upper-surface throughout: Phytomyza elsae

mod 9.x.2017