Camelina, false flax, gold-of-pleasure

fam. Brassicaceae

1a larva with a recognisable head; mine entirely full depth => 2

1b larva a maggot; mine at last largely upper- of lower-surface => 4

1c galls, etc => 100

2a larva with thoracic feet => 3

2b no thoracic feet: Ceutorhynchus minutus

3a larva with prolegs; older larvae live free, causing window feeding: Plutella xylostella

3b no prolegs; larvae mine all their life: Phyllotreta nemorum

4a frass powdery, in green clouds in remote corners of the mine; larva: rear spiraclum seemingly ending in a point: Scaptomyza flava

4b frass in black grains or strings; rear spiraculum with three papillae: Liriomyza xanthocera

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

102 – Acari

102a Eriophyidae: Aceria drabae

103 – Coleoptera

103a Curculionidae: Ceutorhynchus assimilis, chalibaeus

104 – Diptera

104a Cecidomyiidae: Contarinia nasturtii; Dasineura napi

105 – Hemiptera

105a Aphididae: Brevicoryne brassicae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum; Golovinomyces orontii

109b Peronosporaceae: Hyaloperonospora camelinae, parasitica

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae