Crambe, seakale, crambe

fam. Brassicaceae

1a short gallery, that begins on the midrib or the base of the leaf => 2

1b mine different => 3

1c galls, etc => 100

2a larva with thoracic feet: Psylliodes napi

2b larva without feet: Ceutorhynchus pallidactylus

3a larva a maggot => 4

3b larva with well recognisable head => 7

4a mine a gallery from start to end => 5

4b mine eventually a large irregular blotch => 6

5a gallery pinnately branched, lying on top of the midrib and side veins; pupation external: Liriomyza strigata

5b gallery not pinnate, not associated with the venation; pupation internal, in a, generally lower-surface, pupal chamber: Chromatomyia horticola

6a frass in black strings: Liriomyza xanthocera

6b frass powdery, in green “clouds”, often visible only after opening the mine: Scaptomyza flava

7a larvae with prolegs; they mine only briefly, then continue living free under the leaf: Plutella xylostella

7b the larvae, without prolegs, mine all their life => 8

8a larva with thoracic legs: Phyllotreta nemorum

8b no thoracic legs: Ceutorhynchus minutus

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

103 – Coleoptera

103a Curculionidae: Ceutorhynchus assimilis, chalibaeus, griseus

105 – Hemiptera

105a Aphididae: Brevicoryne brassicae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum

109b Peronosporaceae: Hyaloperonospora parasitica

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

30/07/2016

pub 30.vii.2016 · mod 18.vii.2017