Thuja *, Red Cedar

fam. Cupressaceae

1a larva: head and anal shield black; pupation outside the mine: Argyresthia trifasciata

1b head and anal shield dark brown; pupation within the mine (infested twigs wilt and fall to the ground!): Argyresthia thuiella

1c galls, etc => 100

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: Epitrimerus insons; Trisetacus thujae

105 – Hemiptera

105a Pseudococcidae: Planococcus vovae

110 – other causers

110a Fungi, anamorphic Pestalosphaera: Pestalotiopsis funerea

* See also Platycladus.

Not included in the key: Argyresthia cupressella.

28/06/2016