nk> Cryptomyzus ribis (Red currant aphid): identification, images, ecology, control
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Cryptomyzus ribis

Red currant aphid

On this page: Identification & Distribution 

Identification & Distribution:

Cryptomyzus ribis apterae on their primary host are whitish to pale green or yellowish often with a greenish median stripe. Their dorsal hairs are thick and capitate. The antennae are about 1.2 times the body length. The siphunculi are more or less cylindrical, about 3-4 times the length of the cauda. On their secondary host Cryptomyzus ribis siphunculi are usually shorter relative to the length of the cauda (2.4 - 3.1 times). The body length of apterae is 1.6-2.3 mm.

The clarified slide mounts below are of adult viviparous female Cryptomyzus ribis (on primary host) : wingless, and winged.

Micrographs of clarified mounts  by permission of Roger Blackman, copyright AWP  all rights reserved.

The alate has a dorsal abdominal patch indented at the sides, and 31-47 secondary rhinaria on antennal segment III, 11-27 on segment IV and 1-10 on segment V.

The redcurrant aphid host alternates between redcurrant (Ribes rubrum) and woundworts (Stachys spp.). Raised leaf galls are produced on Ribes (see picture above) which are broadly open on the underside where the aphids live. The upperside of the gall turns bright red. Red currant aphids are found throughout Europe, Asia and North America, and can be a serious pest of currant bushes.

Acknowledgements

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

We also thank Plumpton College  and the staff at Plumpton College at Stanmer Park  for their kind assistance, and permission to sample.

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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