Plant Parasites of Europe

leafminers, galls and fungi

Cucumis melo


organ parasitic mode stage note taxonomic group parasite
leaf vagrant Thripidae Mycterothrips albidicornis
leaf hidden Thripidae Thrips tabaci
leaf vagrant Coccinellidae Henosepilachna elaterii
leaf vagrant Chrysomelidae Aulacophora foveicollis
root film Xylariaceae Dematophora necatrix
leaf scale Aleyrodidae Trialeurodes vaporariorum
root vagrant Noctuidae Agrotis segetum
fruit borer Tephritidae Carpomya pardalina
flower hidden Thripidae Frankliniella intonsa
leaf scale Aleyrodidae Bemisia tabaci
leaf miner Agromyzidae Chromatomyia horticola
systemic borer Anguinidae Ditylenchus dipsaci
leaf down Erysiphales Golovinomyces orontii
leaf down Peronosporales Pseudoperonospora cubensis
leaf leaf spot Capnodiales Cladosporium cucumerinum
leaf miner Agromyzidae Liriomyza huidobrensis
root collar gall Actinomycetales Rhodococcus fascians
root gall Meloidogynidae Meloidogyne hapla
leaf vagrant Aphididae Aphis gossypii


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.


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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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 18.ix.2023