organ | parasitic mode | stage | note | taxonomic group | parasite |
---|---|---|---|---|---|
leaf | vagrant | Crambidae | Parapoynx stratiotata | ||
root | scale | Chrysomelidae | Macroplea mutica | ||
leaf | vagrant | larva | Curculionidae | Pelenomus canaliculatus | |
flower | vagrant | larva | Curculionidae | Phytobius leucogaster | |
leaf | vagrant | larva | Curculionidae | Eubrychius velutus | |
unknown | unknown | larva | Curculionidae | Bagous longitarsis | |
stem | borer | larva | doubtful | Curculionidae | Bagous limosus |
stem | borer | larva | Curculionidae | Bagous collignensis | |
leaf | borer | Crambidae | Acentria ephemerella | ||
leaf | gall | Blastocladiales | Physoderma myriophylli | ||
leaf | vagrant | summer generation | Aphididae | Rhopalosiphum nymphaeae |
Organ
the part of the plant that most conspicuously is hit by the parasiteall 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 signsdown: 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.
Last modified 14.vi.2021