Standardization of Chlorination Treatment to Improve Vigour and Viability in TNAU Blackgram Cv.CO 6 (Vigna mungo (L) Hepper)

Studies were undertaken to standardize the chlorination treatments and its dosage and exposure duration of iodine to improve seed vigour and viability in blackgram. Seed invigouration treatments using halogen with two different doses viz., 2 and 4 g of chlorine at three different durations (12, 24, 36h) with and without carrier at 2 g kg¹ of seeds was attempted for fresh, aged treated and treated aged seeds. About 2 mg of chlorine for 12 to 24h duration and with carrier at 2 g kg⁻¹ of seeds could bring the desired advantages in all the three lots and performed better significantly in terms of germination and seedling vigour. Germination improvement was 7, 17 and 14 per cent in fresh seeds, aged treated seeds and treated aged seeds respectively.