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Metopolophium dirhodum (Walker)
Insecta, Homoptera, Aphididae .

Rose-grain aphid

Description, Biology, Life Cycle, Damage, Common Names, Images


[R]Description
- Apterous adult: medium-sized (about 2 mm long); egg-shaped; yellowish-green with a darker, mid-dorsal longitudinal stripe (*) ; siphunculi rather long, slightly conical, pale green with apical striae.

[R]Biology
- A heteroecious species with Rosa (R. canina, R. glauca, R. villosa, R. multiflora) as primary host; colonies do not persist on the primary host beyond June, the aphids then migrating to secondary hosts, especially wheat (*) and barley, before moving on to the underside of leaves of maize.

[R]Damage
- When present in great profusion, this species can cause direct damage. Most common and numerous species on maize at the beginning of the crop; the presence of colonies of 200 aphids on each plant at the 6-8 leaves stage is considered to be the economic injury threshold.
- This aphid is a vector of the maize mosaic virus (MMV) and the barley yellow dwarf virus (BYDV).


[R]Common Names
DE: Bleiche Getreidelaus ES: Pulgon del trigo FR: Puceron des céréales et du rosier IT: Afide verde maggiore della rosa PT: Piolho dos cereais GB: Rose-grain aphid

[R] Images

  1. Metopolophium dirhodum (Walker) (Coutin R. / OPIE)
    Colony on leaf of wheat 2 winged individuals and their offspring.
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  2. Metopolophium dirhodum (Walker) (Coutin R. / OPIE)
    Apterous adults and nymphs on wheat

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