Diapause and post-diapause quiescence demonstrated in overwintering Harmonia axyridis (Coleoptera: Coccinellidae) in northwestern Europe

Title:

Diapause and post-diapause quiescence demonstrated in overwintering Harmonia axyridis (Coleoptera: Coccinellidae) in northwestern Europe

Creator:

Raak-Van Den Berg, C. Lidwien, Peter Willem De Jong, Hemerik, Lia, and Van Lenteren, Joop C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:93173eb7-3acc-412b-a915-fc88c318beb1
uuid:93173eb7-3acc-412b-a915-fc88c318beb1

Subject:

Zoologie, zoologie, entomologie, Coleoptera, Coccinellidae, Harmonia axyridis, invasive species, hibernation, diapause, quiescence, pre-oviposition period, semi-field esperiment, 2, and 59

Type:

article, články, model:article, and TEXT

Description:

The Asian ladybird Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is regarded as an invasive species in many parts of the world. In a previous study we hypothesised that H. axyridis enters diapause at the end of October and then shifts to a quiescent state in December in northwestern Europe. In the present study we test this idea of a short, early period of diapause by sampling beetles from their hibernation sites immediately after their migratory flights in October, subsequently keeping them in outdoor cages, and then, after certain time-intervals, measuring the pre-oviposition time under optimal egg-laying laboratory conditions at 25°C. We did this at both short (12L) and long (16L) photoperiods, since a photoperiodic response is an indicator of true diapause, rather than quiescence. A significant, albeit small, difference in pre-oviposition period between the two photoperiods, which disappears in December, corroborates our earlier hypothesis that the ladybirds are in a state of diapause until mid-December. Compared with that of native ladybirds the diapause of H. axyridis generally is relatively short and weak; moreover, it appears to have become shorter over the last decade. This flexibility in diapausing behaviour may be an important factor that contributes to the invasive success of H. axyridis., C. Lidwien Raak-Van Den Berg ... [et al.]., and Obsahuje seynam literatury

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 2013 Volume:110 | Number:4

Harvested from:

CDK

Metadata only:

false