Lobularia, sweet alyssum

1a larva a maggot; parts of the mine are not full depth: Scaptomyza flava

1b larva with chitinised head; mine full deptth => 2

1c galls, etc => 100

2a larva with thoracic feet and prolegs: Plutella xylostella

2b larva with thoracic feet only: Phyllotreta nemorum

2c neither thoracic feet nor prolegs present => 3

3a larvae mine all their life: Ceutorhychus minutus

3b larvvae soon leave their mine and start causing window feeding: Phytosciara halterata

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 Heeroderidae: Heterodera cruciferae, schachtii

102 – Acari

102a Eriophyidae: Aceria drabae

103 – Coleoptera

103a Curculionidae: Ceutorhynchus assimilis

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe cruciferarum

109b Peronosporaceae: Hyaloperonospora lobulariae

110 – other causers

110a Fungi, Albuginaceae: Albugo candida

110b Fungi, Plasmodiophoraceae: Plasmodiophora brassicae

21/02/2017