harsh downy-rose

synonym: Rosa cuspidata, farinosa, horrida

See also Rosa alba.

organ parasitic mode stage note taxonomic group parasite
leaf gall Cynipidae Diplolepis rosae
leaf gall Cynipidae Diplolepis eglanteriae
leaf gall Cynipidae Diplolepis spinosissimae
leaf gall Cynipidae Diplolepis mayri
leaf down Erysiphales Podosphaera pannosa
leaf gall Cecidomyiidae Dasineura rosae
leaf miner Coleophoridae Coleophora gryphipennella
leaf miner Nepticulidae Ectoedemia rosae
leaf miner Nepticulidae Stigmella anomalella
leaf miner Nepticulidae Stigmella centifoliella
leaf miner Tischeriidae Coptotriche angusticollella
leaf pustule aecia uredinia telia Pucciniales Phragmidium mucronatum
leaf pustule aecia uredinia telia Pucciniales Phragmidium tuberculatum
leaf vagrant Eriophyidae Phyllocoptes adalius
leaf vagrant spring generation Aphididae Metopolophium montanum
leaf vagrant Aphididae Chaetosiphon tetrarhodum
stem vagrant spring generation Aphididae Macrosiphum rosae
leaf vagrant Aphididae Myzaphis bucktoni

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.

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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 14.vii.2019