Peucedanum, hog’s fennel, sulphur-weed, milk parsley, master-wort

Incl. Imperatoria. See also the closely related genus Dichoropetalum.

1a mine < 1 cm, often in numbers together in a leaf axil; larvae, with distinct feet, later live free and cause extensive window feeding => 2

1b mine > 1 cm; larva without feet => 3

1c galls, etc => 100

2a larva: head pale brown: Epermenia chaerophyllella

2b head black: Epermenia aequidentellus

2c larva not described: Epermenia iniquellus

3a long, narrow corridor, abruptly widened into a primary blotch; larva with chitinised head: Ectoedemia viridissimella

3b mine different, larva a maggot => 4

4a primary blotch mine => 5

4b corridor or secondary blotch mine => 7

5a secondary feeding lines conspicuous (common species): Euleia heraclei

5b secondaire feeding lines weak or absent (species not known from the Benelux) => 6

6a frass grains coarse; on different
Peucedanum species: Phytomyza pauliloewii

6b frass grains not remarkable;
on Peucedanum cervaria: Phytomyza peucedani

7a puparium in the mjne: Chromatomyia horticola

7b larva leaves the mine prior to pupation => 8

8a frass in the oldest section of the gallery in small grains: Phytomyza thysselini

8b frass here in pearl chains: Phytomyza thysselinivora

100a Nematoda => 101

100b Acari => 102

100c Coleoptera => 103

100e Diptera => 104

100f Hemiptera => 105

100d Hymenoptera => 106

100g rust fungi => 107

100h smut fungi => 108

100i powdery and downy mildews => 109

100j other causers => 110

102 – Acari

102a Eriophyidae: Aceria peucedani

103 – Coleoptera

103a Curculionidae: Lixus iridis

105 – Hemiptera

105a Aphididae: Semiaphis anthrisci, cervariae

105b Triozidae: Trioza anthrisci, apicalis

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe heraclei

109b Peronosporaceae: Plasmopara peucedani

110 – other causers

110a Fungi, Physodermataceae: Physoderma vagans

110b Fungi, Protomycetaceae: Protomyces macrosporus

110c Fungi, Taphrinaceae: Taphridium umbelliferarum

110d ? on Peucedanum ostruthium

pub 10.ii.2017 ยท mod 7.ix.2017