Abstract
The yield loss and vascular discoloration of potato tubers caused by Pseudomonas solanacearum were surveyed. Susceptible cultivar "Dejima" was grown on field plots whose soil was treated with certain chemicals for their evaluation. A highly significant correlation was found between wilt incidence and yield. Regression lines showed that final wilt incidence could be equated with the percentage of yield loss. With an increase in wilt incidence of the plots, the percentage of discoloration and detection of pathogen from tubers increased.
