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ARS Home » Northeast Area » Ithaca, New York » Robert W. Holley Center for Agriculture & Health » Emerging Pests and Pathogens Research » Research » Publications at this Location » Publication #420204
Research Project: Biology and Management of Invasive Plant Pathogens Affecting Potato and Soybean

Location: Emerging Pests and Pathogens Research

Title: Evaluation of Phytophthora nicotianae race 1 on growth parameters of a highly black shank resistant burley tobacco variety in the greenhouse

Author
item TURNER, ASHTON - University Of Tennessee
item Hansen, Zachariah
item RICHMOND, MITCHELL - University Of Tennessee

Submitted to: Coresta Congress Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 8/2/2024
Publication Date: 10/15/2024
Citation: Turner, A.K., Hansen, Z.R., Richmond, M.D. 2024. Evaluation of Phytophthora nicotianae race 1 on growth parameters of a highly black shank resistant burley tobacco variety in the greenhouse. Coresta Congress Proceedings. CORTESA Congress 2024.

Interpretive Summary:

Technical Abstract: Phytophthora nicotianae, a soilborne oomycete, causes one of the most economically devastating diseases of tobacco known as black shank. In the past several years, burley tobacco growers have reported declining yields. Phytophthora nicotianae has two important races (race 0 and 1) with race 1 being the current predominant race in tobacco growing areas across the U.S. Black shank is managed through a combination of crop rotation,fungicides, and selection of resistant varieties. It was hypothesized that P. nicotianae race 1 could be contributing to burley tobacco yield decline in race 1 resistant varieties despite remaining mostly asymptomatic in the presence of black shank. A greenhouse trial was established to evaluate growth parameters of the resistant variety ‘KT215LC’ which is fully resistant to race 0 (level 10/10 resistance) and highly resistant to race 1 (level 9/10 resistance), and ‘Hybrid 404LC’ which is fully susceptible to black shank races 0 and 1. Preliminary results show ‘KT 215LC’ was negatively impacted in the presence of race 1 in terms of growth parameters such as plant height, stem diameter, leaf length, leaf number, and leaf, stem, and root mass. These results suggest that P. nicotianae is still able to impact plant growth on varieties with high resistance to race 1.