Berteroa

fam. Brassicaceae

1a mine full depth, not associated with the midrib; larva with chitinised head => 2

1b mine upper- or lower-surface (small patches sometimes full depth), associated with the midrib; larva a maggot => 3

1c fleck mine => 5

1d galls, etc => 100

2a larva without feet; mine an untidy corridor: Ceutorhynchus minutus

2b larva with thoracic feet; mine eventually widening into a blotch: Phyllotreta nemorum

3a broad, pinnately branched corridor: Liriomyza strigata

3b irregular blotch => 4

4a frass in thread fragmentsl mine in May-June: Liriomyza xanthocera

4b frass powdery, in blackish-green clouds; mine in May-October: Scaptomyza flava

5a case helicoidal: Apterona helicoidella

5b case tubular: Coleophora onopordiella

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

102 – Acari

102a Eriophyidae: Aceria drabae

103 – Coleoptera

103a Curculionidae: Ceutorhynchus assimilis, carinatus

104 – Diptera

104a Cecidomyiidae: Dasineura berteroae, napi

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum; Golovinomyces orontii

109b Peronosporaceae: Hyaloperonospora berteroae

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

04/11/2015