Calendula, pot marigold

fam. Asteraceae

1a mine small, of indefinite shape, full depth; larva with thoracic feet and a recognisable head; older larvae live free among spun leaves => 2

1b mine not unusually small, upper- or lower-surface, a clear corridor; larva, a maggot, mines all its life => 4

1c gallen etc => 100

2a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana

2b pinacula black => 3

3a larva: behind/below the anus a chitinous comb: Cnephasia asseclana

3b anal comb absent: Cnephasia stephensiana

4a pupation within the mine, in a, generally lower-surface, pupal chamber: Chromatomyia syngenesiae

4b pupation external => 5

5a corridor pinnately branched, entirely or largely upper-surface: Liriomyza strigata

5b corridor not pinnate; a large section of the corridor is lower-surface, only the last part upper-surface: Phytomyza marginella

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

104 – Diptera

104a Agromyzidae: Napomyza lateralis

104b Tephritidae: Tephritis praecox; Trupanea stellata

107 – rust fungi

107a Coleosporiaceae: Coleosporium senecionis

107b Pucciniaceae: Puccinia lagenophorae, isiacae

108 – smut fungi

108a Entylomataceae: Entyloma calendulae

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces cichoracearum; Podosphaera xanthii