Rhodiola *, roseroot

fam. Crassulaceae

1a larvae with thoracic feet and recognisable head; older larvae live free, in a web => 2

1b larvae without feet, no recognisable head; they mine untill just before pupation => 3

1c galls, etc => 100

2a sveral small galleries in a leaf: Yponomeuta sedella

2b a single blotch: Cnephasia sedana

3a larva: both rear spiracula fused into a strongly chitinised respiratory tube => 4

3b rear spiracula free from each other => 5

4a respiratory tube with 5 + 5 openings: Cheilosia rhodiolae

4b respiratory tube with 3 + 3 openings: Cheilosia semifasciata (occurrence on this hostplant improbable)

5a rear spiracula of larva and pupa strikingly forked: Phytomyza rhodiolae

5b rear spiracula not strongly bifid: Phytomyza sedicola

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 Meloidogynidae: Meloidogyne hapla

102 – Acari

102a Eriophyidae: Aceria rhodiolae

107 – rust fungi

107a Pucciniaceae: Puccinia rhodiolae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe sedi

* See also Sedum, often considered a (senior) synonym of Rhodiola.

29/12/2016