Host Range Determination of Powell Butte Globodera (Pbg)
Horticultural Crops Research
2013 Annual Report
1a.Objectives (from AD-416):
To identify the host range of Powell Butte Globodera.
1b.Approach (from AD-416):
This research will.
1)survey the remainder of the OSU farm to determine the extent of the infestation and to collect additional cysts, and.
2)investigate PBG’s host range including potato.
This research was conducted in support of NP303 objective 2 "Identify plant germplasm and cultivars of small fruits resistant to economically-important soilborne diseases" of the parent project. The potato cyst nematodes (Globodera rostochiensis and Globodera pallida) are of regulatory concern to the United States because of their potential impact on potato production and on the ability of U.S. growers to export potatoes to other countries. Because of these concerns, surveys have been conducted to determine the occurrence and distribution of these nematodes in the U.S. During one such survey in Oregon, an atypical Globodera was found that could not be identified as G. rostochiensis or G. pallida. Based upon morphological and molecular data this nematode was described as new species, Globodera ellingtonae. It is critical to understand more about the biology of this nematode to enable regulatory and management decision. Research was conducted to determine if G. ellingtonae is a pathogen of potato. A field trial was established and potato was inoculated with a range of population densities of G. ellingtonae. Results of this study were inconclusive because the potato plants were struck by a blight disease that did not allow potatoes grown without nematodes to realize yield potential.