Teesdalia, shepherd’s cress

fam. Brassicaceae

1a larva a maggot; frass powdery, in green clouds; when held against the light the blotch is irregular in transparancy: Scaptomyza flava

1b larva with sclerotised head; frass black, coarser; mine transparant all over => 2

1c galls, etc => 100

2a corridor, starting in the leaf base or at a thick vein: Orthochaetes insignis

2b mine begins free in the leaf, corridor-like, but may locally be considerably widened: Ceutorrhynchus minutus

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: Ceutorhynchus atomus

109 – powdery and downy mildews

109a Peronosporaceae: Hyaloperonospora teesdaliae

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

27/08/2015