Distribution and Abundance of Carabidae (Coleoptera) Associated with Soybean Aphid (Hemiptera: Aphididae) Populations in Central New York

Predation rates on semi-natural grasslands depend on adjacent habitat type

“…Spillover effects between habitats should be strongest at the edges of neighbouring habitats. Although edge effects can extend over distances larger than 250 m (Ewers & Didham, 2008), differences in the magnitude of an edge effect can be detectable below 20 m (Hajek, Hannam, Nielsen, Bell, & Liebherr, 2007;Roume, Deconchat, Raison, Balent, & Ouin, 2011). An accumulation of generalist predators near habitat edges has been shown (Ries & Fagan, 2003;Wimp, Murphy, Lewis, & Ries, 2011) and can be explained by the proximity of alternative resources in adjacent habitats (Rand et al, 2006).…”

European buckthorn and Asian soybean aphid as components of an extensive invasional meltdown in North America

“…Shelton et al 1983;Fan et al 1993;Levesque and Levesque 1994;Byers et al 2000;Belaoussoff et al 2003;Cardenas and Buddle 2007;Shearin et al 2007). In pitfall trapping studies done in soybean fields in New York State in 2004, Hajek et al (2007 found this species to be the most abundant of 60 species of ground beetles identified. Laboratory feeding studies also showed that A. muelleri readily fed upon soybean aphids and also that they climbed soybean plants in order to feed on them (Hajek et al 2007;Hannam et al 2008).…”

“…In pitfall trapping studies done in soybean fields in New York State in 2004, Hajek et al (2007 found this species to be the most abundant of 60 species of ground beetles identified. Laboratory feeding studies also showed that A. muelleri readily fed upon soybean aphids and also that they climbed soybean plants in order to feed on them (Hajek et al 2007;Hannam et al 2008). In contrast to the situation in eastern North America, A. muelleri has been reported only very rarely in the North-Central US and adjacent parts of Canada (Bousquet and Larochelle 1993;Pearce et al 2002) and not at all from soybean fields (Rutledge et al 2004;M Gardiner and DA Landis unpublished;J Lundgren unpublished).…”

“…One of these is that natural enemies have a greater impact on soybean aphid populations in China and the mid-Atlantic states than in the Midwest, particularly when the aphid is on Rhamnus spp. In China and the Eastern United States, both generalist predators and more specialized parasitoids are important (van den Berg et al 1997;Liu et al 2004;Wu et al 2004b;Miao et al 2007;Nielsen and Hajek 2005;Hajek et al 2007;Wu, Heimpel and Hopper, unpublished data;see below). In the NorthCentral US, however, parasitoids have little impact on A. glycines (Lin and Ives 2003;Rutledge et al 2004;Costamagna and Landis 2006;Kaiser et al 2007;Noma and Brewer 2008;Noma et al 2010) and at least one predator that is present in Eastern N. America (A. muelleri) is absent from soybean fields (see below).…”

“…The carabid A. muelleri is native to Europe and was introduced into Newfoundland, Canada, in the 1840s (Hajek et al 2007). The species reached New York state in the US by 1921, and has been recovered in various agroecosystems in the Northeastern US and Southeastern Canada since then (e.g.…”