drooping brome

synonym: Bromus, Zerna, tectorum

organ parasitic mode stage note taxonomic group parasite
leaf vagrant summer generation Aphididae Sitobion fragariae
leaf gall Eriophyidae Aceria tenuis
flower gall Tilletiales Tilletia bromi
flower gall Ustilaginales Ustilago bullata
leaf down Erysiphales Erysiphaceae Blumeria graminis
leaf film Ustilaginales Tranzscheliella hypodytes
leaf gall Eriophyidae Abacarus hystrix
leaf miner Agromyzidae Cerodontha incisa
leaf miner Agromyzidae Cerodontha pygmaea
leaf pustule uredinia telia Pucciniales Puccinia alternans
leaf pustule uredinia telia Pucciniales Puccinia bromina
leaf pustule uredinia telia Pucciniales Puccinia graminis
leaf pustule uredinia telia Pucciniales Puccinia madritensis
leaf pustule uredinia telia Pucciniales Puccinia symphyti-bromorum
leaf stripe uredinia telia Pucciniales Puccinia striiformis
root collar gall Cecidomyiidae Mayetiola bromicola
inquiline Eriophyidae Aculodes dubius
leaf vagrant summer generation Aphididae Metopolophium dirhodum
leaf vagrant Aphididae Sipha maydis

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.

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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 23.vi.2019