Solidago, golden-rod

fam. Asteraceae

1a mine centered upoon the midrib => 2

1b mine independent of the midrib => 4

1c galls, etc => 100

2a larva lives in the midrib, making from there full depth corridors and blotches into the leaf: Orthochaetes setiger

2b mine not in, but upon the midrib, upper- or lower-surface => 3

3a mine a pinnately branched corridor, rather slender; larva: cephalic skeleton of the Agromyzidae-type: Liriomyza strigata

3b main branch of the mine in the end almost a blotch, with lobed branches; cephalic skeleton of the Tephritidae-type: Cornutrypeta spinifrons

4a primary blotch => 5

4b corridor (possibly a secondary blotch) => 6

5a primary and secondary feeding lines very conspicuous: Nemorimyza posticata

5b no primary and secondary feeding lines apparent: Calycomyza solidaginis

6a corridor very long and narrow; puparium formed in the mine: Ophiomyia maura

6b corridor not extremely long and narrow; prior to pupation the larve leaves the mine through a semicircular exit slit => 7

7a larva: rear spiraculum with 3 papillae: Liriomyza pusilla

7b rear spiraculum with 9 or more papillae => 8

8a mine 6-9 cm long, exit slit usually in upper epidermis: Phytomyza solidaginis

8b mine 10-12 cm long, exit slit always in lower epidermis: Phytomyza virgaureae

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 Anguinidae: Ditylenchus dipsaci

104 – Diptera

104a Cecidomyiidae: Dasineura virgaeaureae

104b Tephritidae: Campiglossa grandinata, loewiana, solidaginis

105 – Hemiptera

105a Aphididae: Pemphigus trehernei; Uroleucon solidaginis

107 – rust fungi

107a Coleosporiaceae: Coleosporium asterum

107b Pucciniaceae: Puccinia eriophori-alpini, virgae-aureae; Uromyces sommerfeltii

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces asterum var. solidaginis; Podosphaera erigerontis-canadensis

109b Peronosporaceae: Bremia lactucae; Plasmopara solidaginis

110 – other causers

110a Fungi, Synchytriaceae: Synchytrium aureum

110a Fungi, Venturiales: Fusicladium virgaurea

110c Lepidoptera, Tortricidae: Eucosma aspidiscana

Not included in the key: Coleophora amellivora, paripennella, ramosella, solidaginella; Digitivalva solidaginis; Gnorimoschema epithymella, valesiella; Liriomyza trifolii; Ophiomyia curvipalpis, paramaura; Pegomya depressiventris, nigrisquama.