Factors determining local and seasonal variation in abundance of Harmonia axyridis (Coleoptera: Coccinellidae) in Central Europe

0504210 - ÚI 2020 RIV CZ eng J - Journal Article
Honěk, A. - Brabec, Marek - Martinková, Z. - Dixon, A. F. G. - Pekár, S. - Skuhrovec, J.
Factors determining local and seasonal variation in abundance of Harmonia axyridis (Coleoptera: Coccinellidae) in Central Europe.
European Journal of Entomology. Roč. 116, April 4 (2019), s. 93-103. ISSN 1210-5759. E-ISSN 1802-8829
Institutional support: RVO:67985807
Keywords : Coleoptera * Coccinellidae * Sternorrhyncha * Aphididae * Harmonia axyridis * Eucallipterus tiliae * adult, larva * seasonal dynamics * abundance * annual variation * Central Europe
OECD category: Entomology
Impact factor: 1.051, year: 2019
Method of publishing: Open access

To determine the causes of the variation in the seasonal dynamics of Harmonia axyridis (Pallas) in Central Europe, numbers of adults and larvae of this invasive species were recorded on trees (Acer, Betula, Tilia) throughout the growing seasons from 2011 to 2016. Each year beetles were collected every two weeks, using a standardized sweeping method. The seasonal dynamics was expressed as plots of abundance (number of individuals per 100 sweeps) against time (Julian day) and these plots (seasonal profi les) were compared in terms of their size (area under the seasonal profile curve), range, timing and height of the mode (maximum abundance). Timing and size of seasonal profi les varied among hostplants, years and sites. Abundance of larvae paralleled aphid occurrence and peak abundance of adults followed that of larvae 10 to 20 days later. Population dynamics before and after the peak were determined by dispersal. Adults arrived at sites before the start of aphid population growth and persisted there long after aphid populations collapsed. The abundance of H. axyridis decreased from 2011 to 2013 and then increased, achieving the previous levels recorded in 2015 and 2016. The variation in seasonal profi les revealed that H. axyridis, in terms of its response to environmental conditions, is a plastic species and this fl exibility is an important factor in its invasive success.
Permanent Link: http://hdl.handle.net/11104/0295894