Cytisus, broom

Incl. Chamaecytisus, Chronanthus, Spartocytisus.

1a the larva mines the wall of a pod: Bruchidius villosus

1b the larva lives in a case, makes fleck mines => 2

1c the larva lives in the mine, makes a corridor or blotch => 5

1d galls, etc => 100

2a lobe case => 3

2b composite leaf case: Coleophora calycotomella

3a mouth angle 90°; case stand perpendicularly on the leaf: Coleophora saturatella and parthenogenella

3b mouth angle 45°; case obliquely on the leaf => 4

4a behind the mouth a number of short rings: Coleophora colutella

4b no such rings: Coleophora trifariella

5a mine contains little or no frass => 6

5b mine contains a substantial amount of frass => 8

6a larva mines between spun leaves => 7

6b larva in a stellate blotch in the leaf centre: Micrurapteryx kollariella

7a larva darkly coloured: Aproaerema anthyllidella

7b larva pale: Syncopacma cincticulella

8a tentiform mine => 9

8b mine not tentiform, leaf not contracted => 12

9a mine upper-surface => 10

9b mine not described, on Cytisus villosus in Sardinia: Phyllonorycter cytisus

10a mine on Spartocytisus filipes, Spain, Canary Islands: Phyllonorycter spartocytisi

10b mine on Cytisus spp. => 11

11a on Cytisus purgans: West Mediterranean species Phyllonorycter purgantella

11b on Cytisus villosus; Western Mediterranean species: Phyllonorycter triflorella

11c on Cytisus procumbens, scoparius; Western European species: Phyllonorycter staintoniella

12a mine begins as a corridor that ascends along the leaf margin, then descends as a narrow blotch on top of the midrib: Agromyza johannae

12b mine does not begin with a corridor => 13

13a frass as a thick black mass in the centre of the mine; here eventually a cocoon is made and pupation takes place: Oryxolaemus flavifemoratus

13b frass more diffuse, in vague concentric arcs; pupation external: Leucoptera coronillae

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

102 – Acari

102a Eriophyidae: Aceria genistae; Aculops cytisicola

103 – Coleoptera

103a Apionidae: Pirapion immune; Protopirapion atratulum

103b Buprestidae: Agrilus cinctus

103c Curculionidae: Tychius parallelus

105 – Hemiptera

105a Aphididae: Acyrthosiphon pisum; Aphis cytisorum

105b Diaspididae: Chionaspis salicis

107 – rust fungi

107a Pucciniaceae: Dicheirinia canariensis; Uromyces fulgens, genistae, pallidus, sarothamni

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe guarinonii, trifoliorum

109b Peronosporaceae: Peronospora viennotii

110 – other causers

110a Bacteria, Rhizobiaceae: Rhizobium leguminosarum

110b Lepidoptera, Nepticulidae: Trifurcula immundella

110c >witches’ broom

110d Plantae, Santalaceae: Viscum album

Not included in the key: Leucoptera cytisiphagella, heringella, laburnella, zanclaeella; Oryxolaemus flavifemoratus; Phyllonorycter cytisella, cytisifoliae, estrela, eugregori; Phytomyza cytisi.