Eur. J. Entomol. 110 (4): 699-702, 2013 | DOI: 10.14411/eje.2013.093

First record of the harlequin ladybird, Harmonia axyridis (Coleoptera: Coccinellidae) in the Caucasus

Natalia A. BELYAKOVA1, Sergey Ya. REZNIK*,2
1 All-Russian Institute of Plant Protection, Russian Academy of Agricultural Sciences, Pushkin, 196608, St. Petersburg, Russia
2 Zoological Institute, Russian Academy of Sciences, 199034, St. Petersburg, Russia; e-mail: reznik1952@mail.ru

This is the first record of the harlequin ladybird Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) occurring in the Caucasus (Sochi region of Krasnodar territory, Russia). All the adults collected in the field there and reared from collected eggs, larvae and pupae, and their progeny were H. axyridis f. succinea, which is the most common morph in natural populations in South-Eastern Asia and the Russian Far East as well as in invasive populations in the Americas and Europe. In contrast in Western Siberia f. axyridis predominates and this indicates that an occasional introduction from the closest native range in Siberia cannot be considered as the source of the Caucasian population. It is known that populations of H. axyridis can also differ in their photoperiodic responses. The results of earlier experiments on H. axyridis, which originated from the Russian Far East, indicate that the threshold day lengths for the acceleration of preimaginal development and deceleration of reproductive maturation were 13-14 h, while for the invasive populations of this species in Europe these two thresholds are approximately 12 h. In the population studied, the thresholds for both of these photoperiodic responses were also approximately 12 h. Thus, it is concluded that the population of H. axyridis studied is a further eastward continuation of the invasion of this species in Europe.

Keywords: Coleoptera, Coccinellidae, Harmonia axyridis, invasions, Caucasus, Russia, photoperiod

Received: April 8, 2013; Accepted: May 29, 2013; Prepublished online: October 1, 2013; Published: December 1, 2013

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