lesser meadow-rue

synonym: Thalictrum flexuosum, thunbergii

organ parasitic mode stage note taxonomic group parasite
leaf vagrant Gelechiidae Ethmia chrysopygella
leaf vagrant Tenthredinidae Pristiphora sareptana
leaf vagrant Tenthredinidae Pristiphora thalictri
root collar borer larva Rhynchitidae Haplorhynchites pubescens
flower borer Agromyzidae Phytomyza murina
stem miner Agromyzidae Ophiomyia thalictricaulis
stem miner Agromyzidae Ophiomyia definita
stem miner Agromyzidae Ophiomyia ivinskisi
stem miner Agromyzidae Ophiomyia aquilegiana
leaf vagrant summer generation Aphididae Longicaudus trirhodus
fruit gall Cecidomyiidae Ametrodiplosis thalictricola
bud gall Cecidomyiidae Jaapiella thalictri
leaf down Erysiphales Erysiphe aquilegiae var ranunculi
leaf down Erysiphales Leveillula taurica
leaf down Erysiphales Podosphaera thalictri
leaf leaf spot Entylomatales Entyloma thalictri
leaf gall Eriophyidae Phyllocoptes jaapi
leaf miner Agromyzidae Liriomyza thalictri
leaf miner Agromyzidae Phytomyza aquilegiae
leaf miner Agromyzidae Phytomyza minuscula
leaf pustule aecia Pucciniales Aecidium thalictri
leaf pustule aecia Pucciniales Puccinia actaeae-elymi
leaf pustule aecia Pucciniales Puccinia agropyrina
leaf pustule aecia Pucciniales Puccinia alternans
leaf pustule aecia Pucciniales Puccinia elymi
leaf pustule aecia Pucciniales Puccinia persistens
leaf pustule aecia Pucciniales Puccinia triticina
leaf pustule telia Pucciniales Tranzschelia thalictri
leaf pustule Urocystidales Urocystis sorosporioides
leaf vagrant Aphididae Aphis thalictri


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.


mod 23.xii.2019