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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Disease and Pest Management Research Unit » Research » Publications at this Location » Publication #355199

Research Project: Development of Knowledge-based Approaches for Disease Management in Small Fruit and Nursery Crops

Location: Horticultural Crops Disease and Pest Management Research Unit

Title: Further elucidation of the host range of Globodera ellingtonae

item Peetz, Amy
item BAKER, H - Oregon State University
item Zasada, Inga

Submitted to: Nematropica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/12/2019
Publication Date: 6/15/2019
Citation: Peetz, A.B., Baker, H., Zasada, I.A. 2019. Further elucidation of the host range of Globodera ellingtonae. Nematropica. 49(1):12-17.

Interpretive Summary: Potato cyst nematodes, Globodera pallida and G. rostochiensis, are globally important nematode parasites of potato, with the potential to cause up to 80% reduction in potato yield. Recently, a new potato cyst nematode, G. ellingtonae, was described in the United States. Very little information regarding the biology of this nematode is available. Research was conducted to determine what type of plants are hosts, support reproduction, for G. ellingtonae. Eighteen plant species were evaluated including crop and weed species. Of the crop species tested, only potato and tomato are hosts. Several weed species in the nightshade family were hosts for G. ellingtonae. These results are significant because knowledge of the plant host range of G. ellingtonae is critical when trying to manage or exclude the nematode from an area. This research will be used by regulators to understand the risk of G. ellingtonae becoming established in new locations.

Technical Abstract: Globodera ellingtonae was first discovered in Oregon and Idaho in 2008, and described as a new species in 2012. Knowledge of the host range of this nematode is limited, with only tomato (Solanum lycopersicum) and potato (S. tuberosum) reported as hosts. This study was conducted to expand the information available on the host range of G. ellingtonae. In greenhouse studies, a range of agricultural Solanaceous and nonsolanaceous crop plants and Solanaceous weeds were inoculated with G. ellingtonae and nematode reproduction was determined after four months. Crops historically grown in rotation with potato at the site where G. ellingtonae was discovered in Oregon, alfalfa (Medicago sativa), wheat (Triticum aestievum), and oat (Avena sativa) were all non-hosts for the nematodes. None of the Solanaceous crop plants evaluated, bell and jalepeno pepper (Capsicum annum), tobacco (Nicotiana tabacum), tomatillo (Physalis philadelphica), or eggplant (Solanum melagena) were hosts for G. ellingtonae; leaving tomato and potato as the only Solanaceous crops demonstrated to be hosts for G. ellingtonae. Of the Solanceous weed species evaluated, S. nigrum, S. dulcamara, and S. rostratum were all hosts for G. ellingtonae with final population density/initial population density (Pf/Pi) values ranging from 1.5 to 27.0. The trap crop S. sisymbriifolium was a non-host for the nematode.