Plant Parasites of Europe

leafminers, galls and fungi

genus Cuscuta

organ parasitic mode stage note taxonomic group parasite
flower hidden Thripidae Thrips pillichi
leaf vagrant Erebidae Eublemma polygramma
leaf vagrant Noctuidae Orthosia gothica
predator Eurytomidae Eurytoma strigifrons
predator Eupelmidae Eupelmus confusus
unknown unknown Curculionidae Smicronyx albosquamosus
unknown unknown Curculionidae Smicronyx pauperculus
unknown unknown Curculionidae Smicronyx syriacus
leaf vagrant summer generation Aphididae Aphis fabae fabae
fruit borer Agromyzidae Melanagromyza cuscutae
stem gall Agromyzidae Melanagromyza cuscutae
flower gall Eriophyidae Aceria cuscutae
leaf vagrant rarely Aphididae Aphis hederae
stem gall Curculionidae Smicronyx brevicornis
stem gall Curculionidae Smicronyx coecus
stem gall Curculionidae Smicronyx jungermanniae
stem gall Curculionidae Smicronyx nebulosus
stem gall Curculionidae Smicronyx smreczynskii
leaf vagrant summer generation Aphididae Aphis fabae


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 5.xi.2023