Abstract
Field experiment was conducted at Regional Agricultural Research Station, Ishurdi, Bangladesh during rabi, 1991-92 to find the effect of number of rovral sprays on incidence of Altemaria blight and yield of mustard cv. Tori 7. One, two, three and four sprays were applied at 10 days interval. The highest seed yield of 1483.3 kg ha-1was obtained from four sprays which was statistically similar to that with three sprays.
