http://www.eje.cz tive value, providing the intraguild predator (IGPredator) with signifi cant benefi ts, such as the elimination of a competitor or a potential predator, consumption of a proteinrich meal (Polis et al., 1989) and acquisition of toxins from intraguild prey (IGPrey) (Hautier et al., 2008, Lucas et al., 2012; however, IGP detrimental effects, such as changes in ladybeetle species diversity (Lucas et al., 2007;Grez et al., 2016) and biological control disruption (Michaud, 2012) have already been reported.The multicoloured Asian ladybeetle, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), is an East-Palearctic species native to Japan, China, Korea, Mongolia and Siberia (Koch, 2003). This species was introduced to America and Europe in the late 1980s and the early 2000s, respectively, for aphid biological control purposes (Sloggett & Honek, 2012), where it rapidly became established and then invasive, leading to a well-documented disruption of native ladybird assemblages (