genus Amaranthus

organ parasitic mode stage note taxonomic group parasite
root gall Curculionidae Bothynoderes affinis
stem borer larva Curculionidae Lixus subtilis
leaf scale Aleyrodidae Bemisia tabaci
leaf scale Aleyrodidae Trialeurodes vaporariorum
leaf scale Aleyrodidae Trialeurodes ricini
leaf scale Aleyrodidae Aleuroclava similis
leaf miner Agromyzidae Chromatomyia horticola
leaf vagrant Tenuipalpidae Cenopalpus pulcher
leaf vagrant Aphididae Macrosiphum euphorbiae
fruit vagrant Coleophoridae Coleophora vestianella
leaf vagrant Aphididae Aphis gossypii
leaf vagrant summer generation Aphididae Aphis fabae solanella
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant Aphididae Sitobion avenae
flower gall Urocystidales Thecaphora amaranthi
leaf down Erysiphales Erysiphe celosiae
leaf down Erysiphales Leveillula taurica
leaf down Peronosporales Peronospora amaranthi
leaf miner Agromyzidae Liriomyza bryoniae
leaf miner Agromyzidae Liriomyza strigata
leaf miner Agromyzidae Amauromyza chenopodivora
leaf miner Anthomyiidae Delia echinata
leaf miner Anthomyiidae Pegomya hyoscyami
leaf miner Coleophoridae Coleophora versurella
leaf miner Drosophilidae Scaptomyza graminum
leaf miner Gelechiidae Chrysoesthia drurella
leaf miner Gelechiidae Chrysoesthia sexguttella
leaf pustule Albuginales Wilsoniana amaranthi
leaf pustule Albuginales Wilsoniana bliti
leaf vagrant summer generation Aphididae Aphis fabae
leaf vagrant summer generation Aphididae Myzus persicae
root gall Heteroderidae Heterodera schachtii
leaf vagrant summer generation Aphididae Aphis fabae fabae
stem vagrant Aphididae Aphis craccivora

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 9.v.2019