Rogath blight was a disease affecting crops on Bajor. The only way to eradicate the blight was to burn affected fields at the first sign of contamination, and then let the land lie fallow for a year.
Many of the farms in Relliketh were affected by the blight in 2374.
Dukat, posing as the farmer Anjohl Tennan after being surgically altered to appear Bajoran, told Kai Winn a false story about his farm being affected by the blight. The story reminded Winn of Talnot's Prophecy of the Final Days. (DS9: "'Til Death Do Us Part")