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ARS Home » Pacific West Area » Wapato, Washington » Temperate Tree Fruit and Vegetable Research » Research » Publications at this Location » Publication #394017

Research Project: Developing New Potatoes with Improved Quality, Disease Resistance, and Nutritional Content

Location: Temperate Tree Fruit and Vegetable Research

Title: Understanding Tobacco rattle virus epidemiology in potato through basic and applied assays

item Swisher Grimm, Kylie
item Feldman, Max

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 7/23/2022
Publication Date: 8/4/2022
Citation: Swisher Grimm, K.D., Feldman, M.J. 2022. Understanding Tobacco rattle virus epidemiology in potato through basic and applied assays. Meeting Abstract.

Interpretive Summary:

Technical Abstract: Tobacco rattle virus (genus Tobravirus) is transmitted to potato (Solanum tuberosum) by stubby root nematodes of Trichodorus and Paratrichodorus spp., causing internal tuber necrosis known as corky ringspot disease that results in economic losses for growers. The continuing spread of Tobacco rattle virus and the nematode vector to fields across the U.S., and the reduced availability of nematicides for control of the vector has made management of this disease costly. Improving the overall understanding of corky ringspot disease epidemiology can aid in future development of novel management strategies. Using applied and basic assays, movement of the virus in planta and through seed tubers was assessed, as well as the expression of disease symptoms in plants grown under field conditions with heavy nematode/vector presence and in a greenhouse assay under mock-fumigation conditions. These trials determined that Tobacco rattle virus does not move systemically through a potato root system and that elimination of the pathogen and its vector from soil early in the season will reduce corky ringspot disease symptom development in tubers. Results also indicated that planting seed that does not have corky ringspot disease symptoms is important to prevent quality losses in daughter tuber production, even in the absence of the vector. Overall, these results suggest that growers can decrease economic losses by planting clean seed and by adequate early-season pathogen/vector control.