organ parasitic mode stage note taxonomic group parasite
leaf gall spring generation Aphididae Forda marginata
leaf gall spring generation doubtful Aphididae Baizongia pistaciae
leaf gall spring generation doubtful Aphididae Geoica utricularia
leaf gall spring generation doubtful Aphididae Forda formicaria
leaf gall Psyllidae Agonoscena targionii
leaf vagrant summer generation Aphididae Aphis frangulae
flower gall Eriophyidae Aceria pistaciae
leaf down Erysiphales Phyllactinia pistaciae
leaf gall spring generation Aphididae Forda riccobonii
leaf gall spring generation Aphididae Smynthurodes betae
leaf gall Eriophyidae Aceria stefanii
leaf gall Psyllidae Agonoscena pistaciae
leaf gall Psyllidae Megagonoscena viridis
leaf miner Gracillariidae Caloptilia coruscans
leaf miner Nepticulidae Simplimorpha promissa
leaf pustule uredinia telia Pucciniales Pileolaria terebinthi

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 19.iv.2019