Deschampsia, hair-grass

Incl. Aristavena setacea en Avenella flexuosa.

1a mine full depth; larvae with feet and chitinised head; pupation outside the mine => 2

1b mine upper-surface; larva a maggot; pupation within or outside the mine => 3

1c galls, etc => 100

2a the following Elachistidae have been recorded from Deschampsia. The mines and larvae of many are too incompletely known to place them in a key: Elachistaadscitella, albidella, albifrontella, apicipunctella, argentella, bifasciella, bisulcella, canapennella, cinereopunctella, compsa (occurrence on this plant very doubtful), dimicatella, disemiella, exactella, gleichenella, humilis, luticomella, nobilella, pullicomella, stabilella

3a puparium in the mine => 4

3b pupation outside the mine => 6

4a larva green; puparium red brown; spiracula do not penetrate the epidermis: Cerodontha imbuta

4b larva whitish or hyaline => 5

5a puparium orange brown, front spiracula penetrating the epidermis: Chromatomyia nigra

5b puparium metallic black, spiracula not penetrating: Cerodontha pygmaea

6a larva: cephalic skeleton of Agromyzinae-type * => 7

6b cephalic skeleton of Phytomyzinae-type => 9

7a larva: mandible with 3 teeth: Agromyza lucida

7b mandible with 4 teeth => 8

8a larva: rear spiracula almost touching each other: Agromyza albipennis

8b rear spiracula separated by more than their own diameter: Agromyza nigripes

9a larva: rear spiraculum with 3 papillae => 10

9b rear spiraculum with ≥ 8 papillae: Metopomyza flavonotata

10a frass grains with hazy outlines, arranged irregularly, large and small ones mixed: Liriomyza richteri

10b frass grains with sharp outlines, in two rows, even in size: Liriomyza flaveola

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: Subanguina radicicola

102 – Acari

102a Eriophyidae: Anguina graminis, tenuis

104 – Diptera

104a Cecidomyiidae: Dasineura airae; Hybolasioptera fasciata; Lasioptera calamagrostidis

104b Chloropidae: Oscinella frit

105 – Hemiptera

105a Aphididae: Laingia psammae

106 – Hymenoptera

106a Eurytomidae: Tetramesa airae, petiolata

107 – rust fungi

107a Pucciniaceae: Puccinia deschampsiae, coronata, graminis; Uromyces airae-flexuosae

108 – smut fungi

108a Georgefischeriaceae: Jamesdicksonia dactylidis

108b Tilletiaceae: Tilletia cerebrina, flectens

108c Urocystidaceae: Urocystis deschampsiae

108d Ustilaginaceae: Ustilago striiformis

109 – powdery and downy mildews

109a Erysiphaceae: Blumeria graminis

110 – other causers

110a Fungi, Ceratobasidiaceae: Ceratorhiza rhizodes

110b Fungi, Clavicipitaceae: Claviceps purpurea

* Incl. Aristavena setacea and Avenella flexuosa.

* See also key for the grass-inhagiting Agromyza larvae

Not included in the key: Cerodontha incisa; Liriomyza orbona (insufficiently known).

01/12/2016