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Hyadaphis passerinii

Honeysuckle aphid

Identification & Distribution 

Identification & Distribution:

Hyadaphis passerinii apterae are elongate and grayish green with a waxy bloom. The antennae and legs are black. The prosternum has a dark, clearly defined trapezoid sclerite which is 2.7-3.6 times wider than long. The siphunculi are black and slightly swollen, 0.85-1.2 the length of the cauda which is black and elongate. The body length of Hyadaphis passerinii apterae is 1.3-2.3 mm. Their alates have the abdomen green, mottled with a darker green, and rarely have secondary rhinaria on antennal segment 5.

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 their identification. Some authorities only accord passerinii and foeniculi subspecific status.

Hyadaphis passerinii colonies curl the leaves of honeysuckle (Lonicera periclymenum) upwards in spring. The honeysuckle aphid host alternates: Winged forms migrate to their summer hosts - 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.

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).

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