Centaurium, centaury

fam. Gentianaceae

1a mine upper- or lower-surface; larva a maggot => 2

1b mine full depth; larva with chitinised head => 4

1c galls, etc => 100

2a pupation in the mine; front spiracula pentrate the epidermis; larva with a frontal appendage => 3

2b pupation external; no frontal appendage: Liriomyza bryoniae

3a frass in strings; larva: anterior arm of the cephalic skeleton entirely sclerotised: Chromatomyia gentianae

3b frass in islolated grains; anterior arm only distally sclerotised: Chromatomyia centaurii

4a larva without feet, without length lines; young mine more or less a corridor with frass in a central line: Orthochaetes insignis

4b larva with feet; older larvae with coloured length lines; young mine already blotchy, with dispersed frass: Stenoptilia zophodactylus

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: Smicronyx funebris, reichii

105 – Hemiptera

105a Aphididae: Aphis gentianae

109 – powdery and downy mildews

109a Peronosporaceae: Peronospora erythraeae

110 – other causers

110a Fungi, Albuginaceae: Pustula centaurii

110b Fungi, Synchytriaceae: Synchytrium globosum

08/09/2015