italian maple

tr>

organ parasitic mode stage note taxonomic group parasite
fruit borer larva Curculionidae Bradybatus creutzeri
fruit borer larva Curculionidae Bradybatus kellneri
leaf scale rarely Aleyrodidae Aleurochiton pseudoplatani
leaf miner Gracillariidae Caloptilia rufipennella
leaf vagrant Aphididae Periphyllus bulgaricus
leaf bud gall Eriophyidae Aceria vermicularis
leaf down doubtful Erysiphales Erysiphe syringae-japonicae
leaf down Erysiphales Sawadaea bicornis
leaf leaf spot Rhytismatales Rhytisma acerinum
leaf gall Cecidomyiidae Acericecis vitrina
leaf gall Cecidomyiidae Contarinia acerplicans
leaf gall Cynipidae Pediaspis aceris
leaf gall rarely Eriophyidae Aceria macrorhyncha
leaf gall Eriophyidae Aceria opulifolii
leaf gall Eriophyidae Aculops acericola
leaf miner Gracillariidae Phyllonorycter ochreojunctella
leaf miner Nepticulidae Stigmella speciosa
leaf vagrant Aphididae Periphyllus testudinaceus
leaf vagrant Aphididae Drepanosiphum aceris
leaf vagrant Aphididae Drepanosiphum oregonensis
leaf vagrant Aphididae Periphyllus acericola
flower gall rarely Aphididae Periphyllus aceris

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 18.v.2019