Location: Potato, Pulse and Small Grains Quality Research
Project Number: 3060-21430-009-029-S
Project Type: Non-Assistance Cooperative Agreement
Start Date: Sep 1, 2025
End Date: Aug 31, 2027
Objective:
a) determine black dot resistance for market relevant table-stock potato cultivars
b) establish the impact of crop growth duration on black dot tuber blemish incidence and severity in US market relevant table-stock potato cultivars / breeding lines
c) elucidate the potential tolerance/resistance mechanisms of potato tuber to black dot
Approach:
The field study will be conducted using seed tubers obtained commercially and from the NDSU Potato Breeding Program. Tubers and will be planted under pivot irrigation and soil will be in-furrow infested with C. coccodes. Conventional agronomic practices of soil preparation, fertilization, irrigation, and pest management will be applied in this trial. Plots will be assessed weekly for quantification of black dot stem symptoms particularly during the end of the growing period. After harvest, tubers will be cured and stored under controlled environmental conditions. Potato tubers will be evaluated for black dot disease at harvest and during storage, and tuber tissues will be collected for microscopical and biochemical analysis using established protocol of PI’s laboratory. Standard statistical model of field design will be used for the field experiment and mean significant differences between cultivars, treatments, and cultivar × treatment interactions will be compared using the statistical analytical software.