Natural enemy impact on eggs of the invasive brown marmorated stink bug, Halyomorpha halys (St ål) (Hemiptera: Pentatomidae), in organic agroecosystems: A regional assessment

Publication date: October 2016 Source:Biological Control, Volume 101 Author(s): Emily C. Ogburn, Ricardo Bessin, Christine Dieckhoff, Rachelyn Dobson, Matthew Grieshop, Kim A. Hoelmer, Clarissa Mathews, Jennifer Moore, Anne L. Nielsen, Kristin Poley, John M. Pote, Mary Rogers, Celeste Welty, James F. Walgenbach Understanding native natural enemy impacts on the invasive brown marmorated stink bug, Halyomorpha halys (Stål), offers insight into the population dynamics of this invasive pest and the potential for biological control. This two-year study offers a broad-scale assessment of mortality factors affecting sentinel and naturally laid H. halys eggs in agroecosystems in the pest’s invaded range in eastern North America. Predation and parasitism rates varied among states and crops, but overall were low. Average maximum levels of biological control were estimated to be about 19% and 20% in 2013 and 2014, respectively. Of the eggs destroyed by natural enemies, chewing predation was the most prevalent. Parasitism by native parasitoids was very low, with adult parasitoids emerging from <1% of eggs averaged across crops, locations, and years; an additional 2.8% of eggs contained partially developed parasitoids. Lower percentages of sentinel H. halys hatched in organically versus conventionally managed crops, and in most cases had higher percentages of predation. Parasitism of sentinel and naturally laid eggs of the native stink bugs Euschi...

Source: Biological Control - July 19, 2016 Category: Biology Source Type: research