R. maidis

Rhopalosiphum maidis (Fitch, 1856)

Corn leaf aphid

1.3-2.9 mm.
Apterous: elongate, bluey green, cornicles and cauda short and dark, purple spots around cornicular insertion.
Alate: body elongate, dark green with black marginal sclerites; antennae short, equal to half length of body, processus terminalis short, cornicles short, dark with slight constriction at tip, cauda short and dark.

See identification file

Anholocyclic in Europe.

Poaceae: Zea mays (maize), Sorghum vulgare (millet), Hordum vulgare (barley)...

R. maidis is rarely observed in spring.
Populations on maize appear to be restricted to the Mediterranean Rim.

Agronomic impact

R. maidis causes longitudinal rolling of the last growing leaf of maize.
The aphid secretes abundant honeydew where sooty mould develops.
It transmits the barley yellow dwarf virus (BYDV).



In this folder

Modification date : 07 February 2023 | Publication date : 08 November 2010 | Redactor : Evelyne Turpeau, Maurice Hullé, Bernard Chaubet