Alliaria, hedge garlic

fam. Brassicaceae

1a corridor, vanishing into the midrib => 2

1b corridor or blotch, not ending in the midrib => 3

1c galls, etc => 100

2a larva a maggot: Phytomyza rufipes

2b larva with sclerotised head: Ceutorhynchus pallidactylus

3a mine full depth; larva with chitinised head => 4

3b mine upper- or lower-surface; larva a headless maggot => 6

4a tiny corridor or blotch, < 5 mm: Plutella xylostella

4b blotch, not preceded by a corridor, with a green centre: Xenostrongylus lateralis

4c corridor, > 10 mm => 5

5a larva without feet; mine an untidy corridor: Ceutorhynchus minutus

5b larva with thoracic feet; latest part of the mine blotchy: Phyllotreta nemorum

6a mine largely a broad corridor or elongated blotch, positioned over the midrib => 7

6b mine not associated with the midrib => 8

7a irregular blotch over the midrib, with few, short side branches without apparent direction; frass in short thread fragments: Liriomyza xanthocera

7b broad corridor over the midrib, its more numerous side branches positioned over the main lateral veins; frass in longer pearl chains: Liriomyza strigata

8a final part of the mine blotchy => 9

8b mine a corridor throughout => 10

9a frass in thread fragments; mines in May-June; larva: rear spiraculum with 3 clear papillae: Liriomyza xanthocera

9b frass in extremely fine grains, concentrated in greenish-black clouds; mines in May-October; rear spiraculum seemingly with 1 pointed papilla: Scaptomyza flava

10a puparium in the mine: Chromatomyia horticola

10b prior to pupation the larva leaves the mine through a semicircular exit slit: Liriomyza bryoniae

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: Aulacobaris coerulescens; Ceutorhynchus assimilis, chalibaeus, sulcicollis.

105 – Hemiptera

105a Aphididae: Lipaphis alliariae

107 – rust fungi

107a Pucciniaceae: Puccinia isiacae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum

109b Peronosporaceae: Hyaloperonospora niessliana

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b “Fungi”, Plasmodiophoraceae: Plasmodiophora brassicae


pub 17.i.2017 ยท mod 4.viii.2017