Xanthium, cocklebur

fam. Asteraceae

1a mine a pinnately branching gallery, main and side branches on top op midrib and side veins:: Liriomyza strigata

1b gallery not pinnately branched => 2

1c galls, etc => 100

2a pupation within the mine, in a, generally lower-surface, pupal chamber: Chromatomyia cf syngenesiae

2b pupation outside the mine: Liriomyza pusilla

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

104 – Diptera

104a Tephritidae: Trupanea stellata

107 – rust fungi

107a Pucciniaceae: Puccinia helianthi, xanthii

109 – powdery and downy mildews

109a Erysiphaceae: Golovinomyces spadiceus; Podosphaera xanthii

109b Peronosporaceae: Bremia lactucae; Plasmopara angustiterminalis

Not included in the key: Liriomyza trifolii.

15/11/2015