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Cymbalaria aphidOn this page: Identification & Distribution Biology & Ecology Other aphids on the same host
Identification & Distribution
Adult apterae of Myzus cymbalariae (see first two pictures below) are matt yellowish green or yellowish brown to dark brown or deep crimson red (cf. Myzus ascalonicus, which are shiny). The antennal tubercles have their inner faces apically convergent in dorsal view (cf. Myzus ascalonicus, which has the inner faces approximately parallel in dorsal view). Their legs and antennae are pale, apart from the ends of the antennae and the tarsi. The dorsal cuticle is scaly (cf. Myzus ascalonicus, which does not have the dorsal cuticle scaly). The siphunculi are shorter than antennal segment III, distinctly swollen towards the apex, evenly coloured throughout and with only a very small flange. The narrowest part of the stem of the siphunculi is slightly thicker than the hind tibia at midlength (cf. Myzus ascalonicus, which has the narrowest part of the siphunculi equal in width or thinner than the hind tibia at midlength). The cauda is roughly triangular in shape, and short: about one third the length of the siphunculi. The body length of Myzus cymbalariae apterae is 1.2-2.0 mm.
The alate Myzus cymbalariae (see second picture above) has the dorsal abdominal sclerotization at least partly divided into separate segmental cross bands (cf. the alate Myzus ascalonicus which has a large central dark patch extending over at least the central areas of abdominal tergites 3-6 or 4-6).
The images below show a Myzus cymbalariae aptera and alate in alcohol.
The cymbalaria aphid does not host alternate, but is extremely polyphagous, feeding on a similar range of hosts to Myzus ascalonicus including Alliaceae, Caryophyllaceae, Scrophulariaceae, and Violaceae. There is no sexual stage in the life cycle and no eggs are produced. Like Myzus ascalonicus, Myzus cymbalariae was first found in Britain (in 1954), and has since spread to many parts of the world.
Biology & Ecology
Myzus cymbalariae can build up to quite large populations on common ornamental plants such as mouse ear (Cerastium tomentosum) (see picture below).
Myzus cymbalariae produces an unusual 'crimson' red-brown variant (see picture below). The most heavily pigmented forms are produced in colder weather.
Other aphids on same host: