EFFECT OF DIFFERENT NITRAOGEN SOURCES ON THE GROWTH OF ALTERNARIA DAUCI CAUSING LEAF BLIGHT OF CARROT

Minimum inhibitory concentration of carbendazim among the 12 isolates of Alternaria dauci (Kuhn) Groves & Skollo causing leaf blight of carrot showed variation. Isolate Ad-11 was most sensitive have MIC 6% and Ad-2 was highly resistant have MIC 20%. The effect of Ammonium nitrate, Calcium nitrate, Sodium nitrate and Zinc nitrate were tested growth rate of Alternaria dauci causing leaf blight of carrot. Sodium nitrate was found to be best source of nitrogen for both isolates.