common mouse-ear

organ parasitic mode stage note taxonomic group parasite
fruit borer doubtful Gelechiidae Caryocolum blandelloides
fruit vagrant Coleophoridae Coleophora striatipennella
flower gall Aphididae Brachycolus cerastii
leaf bud gall Cecidomyiidae Dasineura cerastii
leaf bud gall Eriophyidae Aceria cerastii
leaf down Peronosporales Peronospora conferta
leaf down Peronosporales Peronospora fontana
leaf gall Triozidae Trioza cerastii
leaf miner Anthomyiidae Pegomya holosteae
leaf miner Drosophilidae Scaptomyza graminum
leaf miner Gelechiidae Caryocolum alsinella
leaf miner Gelechiidae Caryocolum marmorea
leaf miner Gelechiidae Caryocolum proxima
leaf pustule uredinia telia Pucciniales Melampsorella caryophyllacearum
leaf vagrant Aphididae Myzus certus
leaf leaf spot Capnodiales Phacellium alborosellum

Organ

the part of the plant that most conspicuously is hit by the parasite

all buds: both flower buds and leaf buds
flower: also inflorescence
leaf: also needle, phyllodium, petiole
leaf bud: also unfolding young leaf
fruit: also seed
root: also root stock, runners
root collar: also the lowest part of the stem
stem: also culm, the lower part of the peduncle, in grasses also leaf sheath
systemic: the entire above-ground plant.

PARASITIC MODE

borer: larva living internally, almost no outwards signs
down: 0.5-2 mm high fungal down
film: very thin cover of fungal tussue
gall: swelling and/or malformation
grazer: feeding at the outside of the plant
leaf spot discoloured, often ± necrotic, generally not galled, sign of a fungus infection
miner-borer: larve initially makes a mine, lives as a borer later
pustule: plug of fungal tissue, generally brown-black and < 2 mm
stripe: longitudinal line of fungal tissue in a grass leaf
vagrant: (aphids, mites) living freely on the plant, at higher densitiy causing malformations.

IMPORTANT

The host plant spectre of a parasite is rarely known exhaustively; this applies in particular at the species level. It is advisable therefore to check at least also the list of all parasites of this genus.

 

mod 24.iii.2018