Plant Parasites of Europe

leafminers, galls and fungi

genus Citrullus

organ parasitic mode stage note taxonomic group parasite
leaf scale Aleyrodidae Bemisia tabaci
flower hidden Thripidae Thrips atratus
flower hidden Thripidae Thrips italicus
flower hidden Thripidae Tenothrips frici
flower hidden Thripidae Tenothrips discolor
leaf hidden Thripidae Thrips tabaci
flower predator Phlaeothripidae Haplothrips reuteri
root vagrant larva Dictyopharidae Dictyophara europaea
leaf predator Thripidae Scolothrips latipennis
leaf vagrant Coccinellidae Henosepilachna elaterii
leaf leaf spot Pleosporaceae Alternaria citrullicola
root vagrant Tenebrionidae Opatrum sabulosum
stem down Nectriaceae Fusarium oxysporum
root film Ceratocystidaceae Berkeleyomyces basicola
root film Pythiaceae Pythium aphanidermatum
leaf film Pythiaceae Globisporangium ultimum
leaf leaf spot Botryosphaeriaceae Macrophomina phaseolina
root film Ceratobasidiaceae Rhizoctonia solani
leaf leaf spot Dermateaceae Gloeosporium orbiculare
leaf leaf spot Mycosphaerellaceae Septoria citrullicola
root collar pustule Atheliaceae Athelia rolfsii
leaf leaf spot Pleosporaceae Alternaria cucumerina
leaf leaf spot Corynesporaceae Corynespora cassiicola
leaf leaf spot Mycosphaerellaceae Septoria cucurbitacearum
leaf scale Aleyrodidae Trialeurodes vaporariorum
stem borer Cerambycidae Parmena pubescens
leaf vagrant Cicadellidae Zyginidia sohrab
leaf vagrant summer generation Aphididae Myzus persicae
leaf vagrant Aphididae Macrosiphum euphorbiae
leaf vagrant summer generation Aphididae Aphis fabae
leaf down Erysiphales Golovinomyces cucurbitacearum
leaf down Erysiphales Golovinomyces orontii
leaf down Erysiphales Podosphaera xanthii
leaf leaf spot Capnodiales Cladosporium cucumerinum
leaf miner Agromyzidae Liriomyza bryoniae
leaf miner Agromyzidae Liriomyza trifolii
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 5.ii.2024