Plant Parasites of Europe

leafminers, galls and fungi

Impatiens parviflora

small balsam

organ parasitic mode stage note taxonomic group parasite
leaf leaf spot Phyllostictaceae Phyllosticta impatientis
leaf leaf spot Ascomycota incertae sedis Apiocarpella impatientis
leaf leaf spot Didymellaceae Ascochyta impatientis
leaf leaf spot Pleosporales Mycocentrospora acerina
leaf vagrant Aphididae Myzus ornatus
leaf vagrant Sphingidae Deilephila elpenor
leaf vagrant Geometridae Xanthorhoe biriviata
stem borer Anthomyzidae Paranthomyza nitida
leaf scale Aleyrodidae Aleyrodes lonicerae
leaf gall Aphrophoridae Philaenus spumarius
leaf miner Agromyzidae Chromatomyia horticola
leaf down Erysiphales Podosphaera xanthii
leaf miner Agromyzidae Phytoliriomyza melampyga
leaf pustule aecia uredinia telia Pucciniales Puccinia komarovii
leaf pustule uredinia telia Pucciniales Cronartium flaccidum
leaf pustule uredinia telia Pucciniales Puccinia argentata
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Myzus persicae
leaf vagrant Aphididae Impatientinum asiaticum


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.


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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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.


Last modified 21.x.2022