organ parasitic mode stage note taxonomic group parasite
fruit vagrant Coleophoridae Coleophora striatipennella
systemic borer Anguinidae Ditylenchus dipsaci
fruit gall Cecidomyiidae Dasineura fructum
fruit gall Curculionidae Sibinia subtriangulifera
leaf bud gall Cecidomyiidae Dasineura lotharingiae
leaf bud gall Eriophyidae Aceria cerastii
leaf down Peronosporales Peronospora conferta
leaf down Peronosporales Peronospora fontana
leaf down Peronosporales Peronospora paula
leaf gall Triozidae Trioza cerastii
leaf miner Agromyzidae Amauromyza flavifrons
leaf miner Anthomyiidae Delia echinata
leaf miner Anthomyiidae Pegomya flavifrons
leaf miner Drosophilidae Scaptomyza graminum
leaf miner Tortricidae Cnephasia incertana
leaf pustule Chytridiales Synchytrium aureum
leaf pustule uredinia telia Pucciniales Melampsorella caryophyllacearum
leaf pustule telia Pucciniales Puccinia arenariae
stem miner Agromyzidae Ophiomyia melandricaulis
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 7.ii.2018