Cardaria*, whitetop, hoary cress

fam. Brassicaceae

1a larva with well recognisable head; mine full depth, transparant => 2

1b larva a maggot; mine upper- or lower-surface, greenish when lighted from behind => 4

1c galls, etc => 100

2a larva with prolegs; older larvae live free under the leaf; mine small, roundish: Plutella xylostella

2b no prolegs;larve mines livelong; mine not that small, a corridor => 3

3a larva without feet: Ceutorhynchus minutus

3b larva with thoracic feet: Phyllotreta nemorum

4a frass powdery, in green clouds in remote corners of the mine; mine in the end widened into an irregular blotch: Scaptomyza flava

4b frass black, in grains or strings; mine a corridor till the end => 5

5a corridor closely following the leaf venation => 6

5b corridor independent of the leaf veins => 7

6a larva: cephalic skeleton with three backwards pointing arms: Ophiomyia beckeri

6b cephalic skeleton with two backwards pointing arms: Liriomyza strigata

7a pupaption within the mine, in a, generally lower-surface, pupal chamber: Chromatomyia horticola

7b pupation external => 8

8a larva: rear spiraculum with 7-12 papillae: Liriomyza bryoniae

8b rear spiraculum with 3 papillae: Liriomyza brassicae

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 lepidii, nasturtii

105 – Hemiptera

105a Aphididae: Lipaphis erysimi

107 – rust fungi

107a Pucciniaceae: Puccinia isiacae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum

109b Peronosporaceae: Hyaloperonospora parasitica; Perofascia lepidii

110 – other causers

110a Fungi, Albuginaceae: Albugo lepidii

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

*Often merged with Lepidium.

24/02/2017

See also Amauromyza flavifrons (xenophagy?)