InfluentialPoints.com
Biology, images, analysis, design...
Aphids Find them How to ID AphidBlog
"It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)

 

 

Identification & Distribution:

Adult apterae of Myzus varians (see first picture below) are pale green or yellow-green with conspicuously banded antennae. The terminal process of the antenna is 3.9-5.5 times longer than the base of the sixth antennal segment. The ends of the siphunculi are black. Apterae on peach have the distal half or more of the siphunculi black, whereas those on clematis (as pictured here) have only the tips of the siphunculi black. The body length of the adult aptera is 1.7-2.3 mm.

 

The alate is very dark, with a large dorsal abdominal black patch (second picture above shows a developing fourth-instar alate).

The clarified slide mounts below are of adult viviparous female Myzus varians : wingless on the primary host, on the secondary host, and winged.

   

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

Myzus varians host alternates from Prunus persica (peach) to various Clematis species. Spring populations cause longitudinal rolling and reddening of the leaves of peach trees. On Clematis they can build up damaging populations. The species is native to eastern Asia, but has long been found in North America. It was first recorded in Europe in 1947, and has subsequently spread to south west Asia where it is a serious pest of peaches.

 

Other aphids on same host:

Acknowledgements

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).

Useful weblinks