Harmonia axyridis: a threat to Brazilian Coccinellidae?

Invasions by ladybugs, ladybirds, and other predatory beetles

“…Burgio et al (2002) note, however, that negative impact on A. bipunctata from H. axyridis may be softened because intraguild predation does not outweigh cannibalism in interactions between these two species. In South America, timed visual sampling conducted weekly throughout the year in secondary forest both before and after the 2002 arrival of H. axyridis in Parana, Brazil, revealed declines of formerly common ladybirds (Martins et al 2009). …”

Comparative demography of the exotic Harmonia axyridis with other aphidophagous coccinellids reared on artificial diet

“…In Brazil, this coccinelid was detected for the first time in Curitiba, PR, in April 2002, feeding on the aphid Tinocallis kahawaluokalani (Kirkaldy, 1907) (Hemiptera: Aphididae) (Almeida & Silva, 2002). Since then, H. axyridis has been found in various municipalities, in the states of the Central-West, Southeast and South regions of the country (Milléo et al, 2008;Martins et al, 2009;Bernardi et al, 2010;Koch et al, 2011). More recently, it was recorded in other South American countries including Chile (Grez et al, 2010), Uruguay (Nedved & Krejèik, 2010), Colombia (Amat-García et al, 2011), Peru (Iannacone & Perla, 2011) and Ecuador (González & Kondo, 2012).…”

“…Performed surveys in different areas around the world indicate increases of H. axyridis and decreases of native species (Milléo et al, 2008;Martins et al, 2009;Almeida & Ribeiro-Costa, 2009;Bernardi et al, 2010).…”

Harmonia axyridis (Coleoptera: Coccinellidae): Smelling the rat in native ladybird declines

“…The focus of this work has been actual or anticipated declines in native species abundance since the introduction of H. axyridis (e.g., Michaud, 2002;Martins et al, 2009;Adriaens et al, 2010;Roy et al, 2012Roy et al, , 2016Grez et al, 2016), although the detailed picture is complex (Harmon et al, 2007;Bahlai et al, 2015). This focus has been coupled to numerous ex-this amounts to a total budget of €198 million to €266 million per year (Chakir et al, 2016).…”