Reseda, mignonette

fam. Resedaceae

1a mine full depth, very transparant; larva with chitinised head => 2

1b mine (mostly) entirely upper- or lower-surface; larva a maggot => 4

1c galls, etc => 100

2a mine < 1 cm; larva later lives free, causing window feeding: Plutella xylostella

2b mine larger; larva remains in the mine till shortly before pupation => 3

3a larva without feet; corridor sides rather smooth: Ceutorhynchus minutus

3b larva with thoracic feet; corridor sides irregularly indented: Phyllotreta nemorum

4a blotch with lobelike extensions; frass powdery, in green clouds: Scaptomyza flava

4b corridor; frass black, grains or strings => 5

5a corridor unbranched; puparium in the mine, in a, usually lower-surface, pupal chamber; frass in widely dispersed grains: Chromatomyia horticola

5b corridor pinnately branched, main branch overlying the midrib; pupation outside the mine; frass in strings or pearl chains => 6

6a main branch slender, definitely a corridor: Liriomyza strigata

6b main branch wider, rather an elongated blotch: 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

103 – Coleoptera

103a Curculionidae: Ceutorhynchus ? carinatus, pallidactylus, resedae

107 – rusr fungi

107a Pucciniaceae: Puccinia isiacae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum; Leveillula taurica

109b Peronosporaceae: Hyaloperonospora crispula

110 – other causers

110a Fungi, Albuginaceae: Albugo resedae

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

Not included in the key: Apterona helicoidella; Liriomyza brassicae.

26/01/2017