Effect of Phytoextracts on Alternaria Blight Disease (Alternaria brassicae (Berk.) Sacc.) of Mustard (Brassica juncea L.)

Mustard is the one of the most important oil seed crops among the major Rabi oil seed of India. Alternaria blight disease which is caused by Alternaria brassicae (Berk.) Sacc. is considered to be the most devastating disease of this crop. The general inadequacy of chemical fungicides to tackle alternaria blight in mustard has led to the search for ecofriendly management to this disease. Therefore, present study entitled “Effect of phytoextracts on Alternaria blight disease (Alternaria brassicae (Berk.) Sacc.) of mustard (Brassica juncea L.)” was carried out during Rabi season in the year 2023-24 in - vivo and in situ. Effects of treatments were evaluated on the radial growth (mm) and disease intensity (%) in - vitro and in situ. Among the plant extracts, garlic bulb extract (T2) showed the significant inhibitory effect, reducing the mean colony diameter to 23.12 mm and achieving a radial growth per cent inhibition of 62.54 respectively as compared to control T0. The disease intensity (%) at 45, 60, 75 and 90 DAS was significantly decreased in treatment T2 - garlic bulb extract (16.62), (23.48), (31.72) and (35.63) respectively as compared to control T0.