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Hyadaphis passerinii

Honeysuckle aphid

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

Identification & Distribution:

Hyadaphis passerinii apterae (see first picture below) are elongate and grayish green with a waxy bloom. The antennae and legs are black. The prosternum has a dark trapezoid sclerite, visible in clarified mounts, which is 2.7-3.6 times wider than long (cf. Hyadaphis foeniculi where the prosternal sclerite is 1.36-2.6 times wider than long). The siphunculi are black and slightly swollen, 0.85-1.15 the length of the black, elongate cauda (cf. Hyadaphis foeniculi  wich has the siphunculi 1.05-1.45 times the length of the cauda). The body length of Hyadaphis passerinii apterae is 1.3-2.3 mm.

Hyadaphis passerinii alates (see second picture above) have the abdomen green, mottled with a darker green, and rarely have secondary rhinaria on antennal segment 5.

The clarified slide mounts below are of adult viviparous female Hyadaphis passerinii : wingless from primary host, and winged.

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

N.B. The characteristics of some of the populations we have found appear to be intermediate between Hyadaphis passerinii and Hyadaphis foeniculi: Hence we cannot be certain of the identification. Some authorities only accord passerinii and foeniculi subspecific status.

In spring Hyadaphis passerinii colonies curl the leaves of honeysuckles upwards, especially common honeysuckle (Lonicera periclymenum) and perfoliate honeysuckle (Lonicera caprifolium). The honeysuckle aphid host alternates between its winter host (honeysuckles) and its summer host - umbellifers (Apiaceae) especially Daucus, Conium and Pastinaca, where they colonise the stems, leaves and flowers. The return migration is in autumn. Hyadaphis passerinii is found in Europe and the Middle East and parts of Asia. It has also been introduced to southern Africa, Australia and America.

 

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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