Efficacy and Host Specificity Compared Between Two Populations of The
Biological Control 65 (2013) 53–62 Contents lists available at SciVerse ScienceDirect Biological Control journal homepage: www.elsevier.com/locate/ybcon Efficacy and host specificity compared between two populations of the psyllid Aphalara itadori, candidates for biological control of invasive knotweeds in North America ⇑ Fritzi Grevstad a, , Richard Shaw b, Robert Bourchier c, Paolo Sanguankeo d, Ghislaine Cortat e, Richard C. Reardon f a Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331, USA b CABI, Bakeham Lane, Egham, Surrey TW20 9TY, United Kingdom c Agriculture and AgriFood Canada-Lethbridge Research Centre, Lethbridge, AB, Canada T1J 4B1 d Olympic Natural Resources Center, University of Washington, Forks, WA 98331, USA e CABI, CH 2800 Delemont, Switzerland f USDA Forest Service, Forest Health Technology Enterprise Team, Morgantown, WV 26505, USA highlights graphical abstract " Two populations of the psyllid Aphalara itadori are effective at reducing knotweed growth and biomass. " The two populations differ in their performance among different knotweed species. " Development of A. itadori occurred infrequently on several non-target plant species. " The psyllid exhibited non-preference and an inability to persist on non- target plants. article info abstract Article history: Invasive knotweeds are large perennial herbs in the Polygonaceae in the genus Fallopia that are native to Received 2 February 2012 Asia and invasive in North America. They include Fallopia japonica (Japanese knotweed), F. sachalinensis Accepted 4 January 2013 (giant knotweed), and a hybrid species F. x bohemica (Bohemian knotweed). Widespread throughout Available online 12 January 2013 the continent and difficult to control by mechanical or chemical methods, these plants are good targets for classical biological control.
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