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"It has long been an axiom of mine that the little things are infinitely the most important" |
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Hyadaphis passeriniiHoneysuckle aphidOn this page: Identification & Distribution Other aphids on the same hostIdentification & 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 whose siphunculi are 1.05-1.45 times the cauda length). 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:Hyadaphis passerinii has been recorded from at least 24 Lonicera species.
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