Colorado Seed Potato Certification Data Analysis Shows Mosaic and Blackleg are Major Diseases of Seed Potato and Identifies Tolerant Potato Varieties.

Seed potato certification programs aim to limit disease incidence in planting material to levels below a threshold that causes significant losses to seed potato buyers. Records maintained for seed potato certification can be analyzed for trends in seed potato varietal mixture and disease incidences over time. We used logistic regression models to determine effects of year, potato variety, and their interaction on the incidences of potato diseases and disorders based on seed potato certification data collected in Colorado from 2012 to 2016.