Daucus, carrot

fam. Apiaceae

1a corridor < 1 cm long, full depth; larva, with feet and chitinised head, later lives free => 2

1b corridor > 1 cm, upper-surface; larva, a maggot, until pupation in the mine => 7

1c galls, etc => 100

2a some silk is deposited in the mine, causing some contraction; larval dark => 3

2b no silk in the min that remains completely flat; larval (apart from pinacula) light in colour => 4

3a larva: pinacula colourless (the bases of the setae themselves are black) : Cnephasia incertana

3b pinacula black: Cnephasia asseclana

4a larva: with three dark,length lines => 5

4b no, or just one dark length line => 6

5a prothoracal plate shining black; first pair of thoral feet black: Agonopterix purpurea

5b prothoracal plate not entirely black; first pair of thoracic feet yellowish green: Agonopterix rotundella

6a larva: head light brown: Epermenia chaerophyllella

6b head black: Epermenia aequidentellus

7a mine entirely within the leaf => 8

7b mine runs toward a thick vein; from there the larva descends through the petiole into the root: Napomyza carotae

8a puparium formed inside the mine: Chromatomyia horticola

8b larva leaves the mine prior to pupation => 9

9a larva with frontal appendage => 10

9b no frontal appendage => 11

10a mine a gallery (very common species): Phytomyza chaerophylli

10b blotch mine (occurence on this host probably xenophagy): Phytomyza heracleana

11a larva: anterior spiraculum fist-shaped; fress partly in pearl strings; Central European species: Phytomyza mylini

11b anterior spiraculum with 1-12 papillae; frass in discrete grains; Mediterranean species: Phytomyza ferulae

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

101a Meloidogynidae: Meloidogyne hapla

102 – Acari

102a Eriophyidae: Aceria carvi; Aculus eurynotus

103 – Coleoptera

103a Curculionidae: Calosirus terminatus

105 – Hemiptera

105a Aphididae: Pemphigus phenax; Semiaphis dauci

105b Triozidae: Trioza apicalis

107 – rust fungi

107a Pucciniaceae: Puccinia chaerophylli; Uromces graminis, lineolatus

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe heraclei; Leveillula braunii, lanuginosa

109b Peronosporaceae: Plasmopara dauci

110 – other causers

110a Bacteria, Rhizobiaceae: Agrobacterium tumefaciens

110b Fungi, Protomycetaceae: Buerenia inundata; Protomyces macrosporus

110c Fungi, Synchytriaceae: Synchytrium aureum

Not included in the key: Liriomyza trifolii.

28/10/2015