Descurainia, flixweed, tansymustard

fam. Brassicaceae

1a larva a head- and feetless maggot: Chromatomyia horticola

1b larva with chitinised head => 2

1c galls, etc => 100

2a larva without feet: Ceutorhynchus minutus

2b larva with thoracic feet: Phyllotreta nemorum

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 drabae

103 – Coleoptera

103a Curculionidae: Ceutorhynchus assimilis, chalibaeus, napi, rapae

104 – Diptera

104a Cecidomyiidae: Contarinia kiefferi, nasturtii; Dasineura bayeri, sisymbrii

107 – rust fungi

107a Pucciniaceae: Puccinia isiacae

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum; Podosphaera drabae

109b Peronosporaceae: Hyaloperonospora sisymbrii-sophiae

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

30/10/2015