Pulicaria, fleabane

1a mine full depth, finally a blotch; larva with chitinised head => 2

1b upper- or lower-surface corridor; larva a maggot => 3

1c fleck mine => 4

1d galls, etc. => 100

2a blotch at leaf margin, with a central dark frass concentration: Pseudorchestes persimilis

2b blotch not necessarily at the leaf margin, no central frass concentration: Digitivalva pulicaria

3a frass in discrete grains; puparium always in the mine: Chromatomyia cf. syngenesiae

3b frass in pearl chains; puparium sometimes in, sometimes outside the mine: Phytomyza conyzae

4a larva in a spatulate leaf case: Colephora conyzae

4b larva in a tubular silken case => 5

5a case 9-10 mm: Coleophora follicularis

5b case ca. 15 mm: Coleophora inulae

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

101 – Nematoda

101a Meloidogynidae: Meloidogyne hapla

103 – Coleoptera

103a Curculionidae: Baris analis

104 – Diptera

104a Cecidomyiidae: Acodiplosis pulicariae, spec.

104b Tephritidae: Myopites apicatus, cypriacus, ? inulaedysentericae

105 – Hemiptera

105a Aphididae: Brachycaudus salicinae

107 – rust fungi

107a Pucciniaceae: Puccinia francoeuriae; Uromyces junci

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces inulae; Podosphaera senecionis

110 – other causers

110a Fungi, Capnodiales: Ramularia cupulariae

110b Fungi, Synchytriaceae: Synchytrium globosum

Not included in the key: Coleophora praecursella; Digitivalva granitella, valeriella; Tebenna micalis.

22/05/2017