organ parasitic mode stage note taxonomic group parasite
leaf miner Curculionidae Orthochaetes setiger
root collar vagrant Aphididae Brachycaudus bicolor
systemic borer Anguinidae Ditylenchus dipsaci
fruit gall Cecidomyiidae Dasineura fructicola
flower gall Cecidomyiidae Dasineura myosotidis
flower gall Tingidae Dictyla humuli
leaf down Erysiphales Golovinomyces asperifolii
leaf down Peronosporales Peronospora myosotidis
leaf leaf spot Entylomatales Entyloma fergussonii
leaf gall Aphididae Myzus myosotidis
leaf miner Agromyzidae Agromyza abiens
leaf miner Agromyzidae Agromyza myosotidis
leaf miner Agromyzidae Agromyza pseudorufipes
leaf miner Agromyzidae Phytomyza myosotica
leaf miner Coleophoridae Coleophora pennella
leaf miner Coleophoridae Coleophora pulmonariella
leaf miner Curculionidae Orthochaetes insignis
leaf miner Elachistidae Stephensia abbreviatella
leaf miner Gracillariidae Dialectica scalariella
leaf miner Sciaridae Phytosciara halterata
leaf miner Sciaridae Phytosciara macrotricha
leaf miner Tortricidae Cnephasia incertana
leaf pustule Chytridiales Synchytrium aureum
leaf pustule Chytridiales Synchytrium globosum
leaf pustule Chytridiales Synchytrium myosotidis
leaf pustule aecia Pucciniales Puccinia cerinthes-agropyrina
leaf pustule aecia Pucciniales Puccinia isiacae
leaf pustule uredinia telia Pucciniales Pucciniastrum brachybotrydis
leaf pustule uredinia telia Pucciniales Cronartium flaccidum
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
root gall Meloidogynidae Meloidogyne hapla
leaf vagrant summer generation Aphididae Brachycaudus helichrysi
leaf vagrant Aphididae Aulacorthum solani
leaf vagrant summer generation Aphididae Brachycaudus cardui
systemic vagrant summer generation Aphididae Aphis triglochinis
leaf vagrant Aphididae Myzus ascalonicus
root collar vagrant Aphididae Brachycaudus jacobi
leaf vagrant Aphididae Aphis gossypii
leaf vagrant Aphididae Myzus ornatus

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 6.v.2019