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Lipaphis pseudobrassicae

Turnip aphid, Mustard aphid

On this page: Identification & Distribution Other aphids on the same host

Identification & Distribution

Adult apterae of Lipaphis pseudobrassicae (see picture below) are small to medium sized yellowish green, grey green or olive green aphids, with a slight white wax bloom. In humid conditions they may be more densely coated with wax. There are two longitudinal rows of dark bands on the thorax and abdomen which unite into a single band near the tip of the abdomen. The combined length of antennal segment III and the terminal process is usually more than 2.4 times the length of the siphunculus (cf. Lipaphis erysimi in which the combined length is usually less than 2.4 times the length of the siphunculus). The siphunculi are pale with dark tips and are about as long as the antennal terminal process. The body length of adult Lipaphis pseudobrassicae apterae is 1.4-2.4 mm.

Image: Lipaphis pseudobrassicae aptera, copyright Andy Jensen, Creative Commons (CC BY-NC-SA 2.0).

Lipaphis pseudobrassicae alatae have a dusky green abdomen with conspicuous dark marginal sclerites, and dusky wing veins. Their antennae have 15-30 secondary rhinaria on segment III, 3-13 on IV and and 0-3 on V.

The Turnip aphid does not host alternate. Lipaphis pseudobrassicae feeds on various members of the mustard family (Brassicaceae), and especially on Brassica crops. It lives on the undersides of leaves as well as on inflorescences, young shoots and growing points. Sexual morphs have been found in some countries, but in warm climates it is predominantly anholocyclic. It's distribution is cosmopolitan apart from parts of northern Europe. It is not recorded in Britain.

 

Other aphids on same host:

Acknowledgements

Our particular thanks to Roger Blackman for images of his clarified slide mounts.

We have made provisional identifications from high resolution photos of living specimens, along with host plant identity. In the great majority of cases, identifications have been confirmed by microscopic examination of preserved specimens. We have used the keys and species accounts of Blackman & Eastop (1994) and Blackman & Eastop (2006) supplemented with Blackman (1974), Stroyan (1977), Stroyan (1984), Blackman & Eastop (1984), Heie (1980-1995), Dixon & Thieme (2007) and Blackman (2010). We fully acknowledge these authors as the source for the (summarized) taxonomic information we have presented. Any errors in identification or information are ours alone, and we would be very grateful for any corrections. For assistance on the terms used for aphid morphology we suggest the figure provided by Blackman & Eastop (2006).

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